Meetings widget is temporarily unavailable

• Type: Bug
• Status: Verified
• Resolution: Unresolved
• Affects Version/s: Master
• Fix Version/s: None
• Component/s: Meetings
• Labels:
  • QA-AUTOMATION
• Fix Priority: 4
• QA Test Name:
  • LocalFile.OAuth2#AssertClientCredentialsIsUserScoped
• QA Test Score: 4

Reproduced on:
Tomcat 9.0.10 + MySQL 5.7. Portal master GIT ID: 066e46e3cf2b8256d2e24d57f13f6db37ffb4af2.

Steps to reproduce:

1. Add a widget page
2. Add a Meetings widget to the page

Expected result:
Widget is added without issue.

Actual result:
Widget is temporarily unavailable and there is a console error.

2019-02-12 21:58:12.932 ERROR [http-nio-8080-exec-6][PortletRequestDispatcherImpl:303] Unable to dispatch request: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
2019-02-12 21:58:12.935 ERROR [http-nio-8080-exec-6][PortletServlet:112] javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:305)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:123)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:592)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:608)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doView(MVCPortlet.java:160)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.doDispatch(LiferayPortlet.java:303)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doDispatch(MVCPortlet.java:492)
        at javax.portlet.GenericPortlet.render(GenericPortlet.java:291)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.render(MVCPortlet.java:316)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:127)
        at com.liferay.portlet.ScriptDataPortletFilter.doFilter(ScriptDataPortletFilter.java:58)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:124)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:71)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.AsyncAttributeAdapterServlet.service(AsyncAttributeAdapterServlet.java:85)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.ServletExceptionAdapter.service(ServletExceptionAdapter.java:76)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:660)
        at com.liferay.portlet.internal.InvokerPortletImpl.render(InvokerPortletImpl.java:357)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.lambda$render$0(MonitoringInvokerPortlet.java:280)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet._render(MonitoringInvokerPortlet.java:383)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.render(MonitoringInvokerPortlet.java:278)
        at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(Unknown Source)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:64)
        at com.liferay.portal.servlet.DirectRequestDispatcherFactoryImpl$IndirectRequestDispatcher.include(DirectRequestDispatcherFactoryImpl.java:202)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:79)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)
        at com.liferay.portal.servlet.TransferHeadersHelperImpl$TransferHeadersRequestDispatcher.include(TransferHeadersHelperImpl.java:162)
        at com.liferay.portlet.internal.PortletContainerImpl._render(PortletContainerImpl.java:870)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$render$2(PortletContainerImpl.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.render(PortletContainerImpl.java:205)
        at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:142)
        at com.liferay.portlet.RestrictPortletContainerWrapper.lambda$render$0(RestrictPortletContainerWrapper.java:126)
        at com.liferay.portlet.RestrictPortletContainerWrapper._render(RestrictPortletContainerWrapper.java:183)
        at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:124)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:212)
        at com.liferay.taglib.portletext.RuntimeTag.doTag(RuntimeTag.java:305)
        at com.liferay.taglib.portletext.RuntimeTag.doEndTag(RuntimeTag.java:342)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.endEvaluation(TagTransformModel.java:400)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.onStart(TagTransformModel.java:344)
        at freemarker.core.Environment.visitAndTransform(Environment.java:422)
        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:107)
        at freemarker.core.Environment.visit(Environment.java:324)
        at freemarker.core.Environment.process(Environment.java:302)
        at freemarker.template.Template.process(Template.java:325)
        at com.liferay.portal.template.freemarker.internal.FreeMarkerTemplate.processTemplate(FreeMarkerTemplate.java:123)
        at com.liferay.portal.template.AbstractSingleResourceTemplate.processTemplate(AbstractSingleResourceTemplate.java:78)
        at com.liferay.fragment.util.FragmentEntryRenderUtil._processTemplate(FragmentEntryRenderUtil.java:190)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:146)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:124)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:113)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:103)
        at com.liferay.layout.content.page.editor.web.internal.portlet.action.AddPortletMVCActionCommand.doProcessAction(AddPortletMVCActionCommand.java:92)
        at com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand.processAction(BaseMVCActionCommand.java:61)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:378)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:97)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.processAction(MVCPortlet.java:260)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:77)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:50)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:610)
        at com.liferay.portlet.internal.InvokerPortletImpl.processAction(InvokerPortletImpl.java:299)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.processAction(MonitoringInvokerPortlet.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._processAction(PortletContainerImpl.java:490)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$processAction$0(PortletContainerImpl.java:148)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.processAction(PortletContainerImpl.java:141)
        at com.liferay.portlet.SecurityPortletContainerWrapper.processAction(SecurityPortletContainerWrapper.java:95)
        at com.liferay.portlet.RestrictPortletContainerWrapper.processAction(RestrictPortletContainerWrapper.java:78)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.processAction(PortletContainerUtil.java:118)
        at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:344)
        at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:172)
        at com.liferay.portal.struts.PortalRequestProcessor._process(PortalRequestProcessor.java:405)
        at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:154)
        at com.liferay.portal.internal.servlet.MainServlet.doPost(MainServlet.java:208)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
        at com.liferay.portal.internal.servlet.MainServlet.service(MainServlet.java:620)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
        at com.liferay.friendly.url.internal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:372)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.ServletAdapter.service(ServletAdapter.java:98)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:358)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:260)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:263)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)
        at com.liferay.portal.servlet.filters.urlrewrite.UrlRewriteFilter.processFilter(UrlRewriteFilter.java:65)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:440)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:290)
        ... 237 more
Caused by: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:94)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.sun.proxy.$Proxy507.getParticipantPowwowMeetingsCount(Unknown Source)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        ... 253 more
Caused by: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        ... 271 more
2019-02-12 21:58:12.970 ERROR [http-nio-8080-exec-6][render_portlet_jsp:131] null
java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
2019-02-12 21:58:13.035 ERROR [http-nio-8080-exec-3][PortletRequestDispatcherImpl:303] Unable to dispatch request: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
2019-02-12 21:58:13.039 ERROR [http-nio-8080-exec-3][PortletServlet:112] javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:305)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:123)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:592)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:608)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doView(MVCPortlet.java:160)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.doDispatch(LiferayPortlet.java:303)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doDispatch(MVCPortlet.java:492)
        at javax.portlet.GenericPortlet.render(GenericPortlet.java:291)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.render(MVCPortlet.java:316)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:127)
        at com.liferay.portlet.ScriptDataPortletFilter.doFilter(ScriptDataPortletFilter.java:58)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:124)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:71)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.AsyncAttributeAdapterServlet.service(AsyncAttributeAdapterServlet.java:85)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.ServletExceptionAdapter.service(ServletExceptionAdapter.java:76)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:660)
        at com.liferay.portlet.internal.InvokerPortletImpl.render(InvokerPortletImpl.java:357)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.lambda$render$0(MonitoringInvokerPortlet.java:280)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet._render(MonitoringInvokerPortlet.java:383)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.render(MonitoringInvokerPortlet.java:278)
        at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(Unknown Source)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:64)
        at com.liferay.portal.servlet.DirectRequestDispatcherFactoryImpl$IndirectRequestDispatcher.include(DirectRequestDispatcherFactoryImpl.java:202)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:79)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)
        at com.liferay.portal.servlet.TransferHeadersHelperImpl$TransferHeadersRequestDispatcher.include(TransferHeadersHelperImpl.java:162)
        at com.liferay.portlet.internal.PortletContainerImpl._render(PortletContainerImpl.java:870)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$render$2(PortletContainerImpl.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.render(PortletContainerImpl.java:205)
        at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:142)
        at com.liferay.portlet.RestrictPortletContainerWrapper.lambda$render$0(RestrictPortletContainerWrapper.java:126)
        at com.liferay.portlet.RestrictPortletContainerWrapper._render(RestrictPortletContainerWrapper.java:183)
        at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:124)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:212)
        at com.liferay.taglib.portletext.RuntimeTag.doTag(RuntimeTag.java:305)
        at com.liferay.taglib.portletext.RuntimeTag.doEndTag(RuntimeTag.java:342)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.endEvaluation(TagTransformModel.java:400)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.onStart(TagTransformModel.java:344)
        at freemarker.core.Environment.visitAndTransform(Environment.java:422)
        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:107)
        at freemarker.core.Environment.visit(Environment.java:324)
        at freemarker.core.Environment.process(Environment.java:302)
        at freemarker.template.Template.process(Template.java:325)
        at com.liferay.portal.template.freemarker.internal.FreeMarkerTemplate.processTemplate(FreeMarkerTemplate.java:123)
        at com.liferay.portal.template.AbstractSingleResourceTemplate.processTemplate(AbstractSingleResourceTemplate.java:78)
        at com.liferay.fragment.util.FragmentEntryRenderUtil._processTemplate(FragmentEntryRenderUtil.java:190)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:146)
        at com.liferay.layout.internal.search.util.LayoutPageTemplateStructureRenderUtil.renderLayoutContent(LayoutPageTemplateStructureRenderUtil.java:97)
        at com.liferay.layout.internal.search.spi.model.index.contributor.LayoutModelDocumentContributor.contribute(LayoutModelDocumentContributor.java:99)
        at com.liferay.layout.internal.search.spi.model.index.contributor.LayoutModelDocumentContributor.contribute(LayoutModelDocumentContributor.java:44)
        at com.liferay.portal.search.internal.indexer.IndexerDocumentBuilderImpl.lambda$getDocument$1(IndexerDocumentBuilderImpl.java:57)
        at java.lang.Iterable.forEach(Iterable.java:75)
        at com.liferay.portal.search.internal.indexer.IndexerDocumentBuilderImpl.getDocument(IndexerDocumentBuilderImpl.java:55)
        at com.liferay.portal.search.internal.indexer.IndexerWriterImpl.reindex(IndexerWriterImpl.java:241)
        at com.liferay.portal.search.internal.indexer.IndexerWriterImpl.lambda$reindex$0(IndexerWriterImpl.java:166)
        at java.util.Optional.ifPresent(Optional.java:159)
        at com.liferay.portal.search.internal.indexer.IndexerWriterImpl.reindex(IndexerWriterImpl.java:166)
        at com.liferay.portal.search.internal.indexer.DefaultIndexer.reindex(DefaultIndexer.java:284)
        at com.liferay.portal.search.buffer.NoAutoCommitIndexer.reindex(NoAutoCommitIndexer.java:275)
        at sun.reflect.GeneratedMethodAccessor371.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.liferay.portal.search.buffer.IndexerRequest.execute(IndexerRequest.java:99)
        at com.liferay.portal.search.internal.buffer.BaseIndexerRequestBufferExecutor.executeIndexerRequest(BaseIndexerRequestBufferExecutor.java:65)
        at com.liferay.portal.search.internal.buffer.DefaultIndexerRequestBufferExecutor.execute(DefaultIndexerRequestBufferExecutor.java:77)
        at com.liferay.portal.search.internal.buffer.BaseIndexerRequestBufferExecutor.execute(BaseIndexerRequestBufferExecutor.java:35)
        at com.liferay.portal.search.internal.buffer.IndexerRequestBufferTransactionLifecycleListener.committed(IndexerRequestBufferTransactionLifecycleListener.java:46)
        at com.liferay.portal.kernel.transaction.TransactionLifecycleNotifier.fireTransactionCommittedEvent(TransactionLifecycleNotifier.java:70)
        at com.liferay.portal.kernel.transaction.TransactionLifecycleNotifier$1.doCommitted(TransactionLifecycleNotifier.java:39)
        at com.liferay.portal.kernel.transaction.NewTransactionLifecycleListener.committed(NewTransactionLifecycleListener.java:29)
        at com.liferay.portal.kernel.transaction.TransactionLifecycleManager.fireTransactionCommittedEvent(TransactionLifecycleManager.java:33)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._commit(DefaultTransactionExecutor.java:108)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:136)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInvokerImpl.invoke(TransactionInvokerImpl.java:39)
        at com.liferay.portal.kernel.transaction.TransactionInvokerUtil.invoke(TransactionInvokerUtil.java:28)
        at com.liferay.layout.content.page.editor.web.internal.portlet.action.UpdateLayoutPageTemplateDataMVCActionCommand.doProcessAction(UpdateLayoutPageTemplateDataMVCActionCommand.java:76)
        at com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand.processAction(BaseMVCActionCommand.java:61)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:378)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:97)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.processAction(MVCPortlet.java:260)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:77)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:50)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:610)
        at com.liferay.portlet.internal.InvokerPortletImpl.processAction(InvokerPortletImpl.java:299)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.processAction(MonitoringInvokerPortlet.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._processAction(PortletContainerImpl.java:490)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$processAction$0(PortletContainerImpl.java:148)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.processAction(PortletContainerImpl.java:141)
        at com.liferay.portlet.SecurityPortletContainerWrapper.processAction(SecurityPortletContainerWrapper.java:95)
        at com.liferay.portlet.RestrictPortletContainerWrapper.processAction(RestrictPortletContainerWrapper.java:78)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.processAction(PortletContainerUtil.java:118)
        at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:344)
        at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:172)
        at com.liferay.portal.struts.PortalRequestProcessor._process(PortalRequestProcessor.java:405)
        at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:154)
        at com.liferay.portal.internal.servlet.MainServlet.doPost(MainServlet.java:208)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
        at com.liferay.portal.internal.servlet.MainServlet.service(MainServlet.java:620)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
        at com.liferay.friendly.url.internal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:372)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.ServletAdapter.service(ServletAdapter.java:98)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:358)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:260)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:263)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)
        at com.liferay.portal.servlet.filters.urlrewrite.UrlRewriteFilter.processFilter(UrlRewriteFilter.java:65)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:440)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:290)
        ... 263 more
Caused by: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:94)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.sun.proxy.$Proxy507.getParticipantPowwowMeetingsCount(Unknown Source)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        ... 279 more
Caused by: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        ... 297 more
2019-02-12 21:58:13.076 ERROR [http-nio-8080-exec-3][render_portlet_jsp:131] null
java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
2019-02-12 21:58:13.132 ERROR [http-nio-8080-exec-1][PortletRequestDispatcherImpl:303] Unable to dispatch request: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
2019-02-12 21:58:13.141 ERROR [http-nio-8080-exec-1][PortletServlet:112] javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
javax.portlet.PortletException: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:305)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.include(PortletRequestDispatcherImpl.java:123)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:592)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.include(MVCPortlet.java:608)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doView(MVCPortlet.java:160)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.doDispatch(LiferayPortlet.java:303)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.doDispatch(MVCPortlet.java:492)
        at javax.portlet.GenericPortlet.render(GenericPortlet.java:291)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.render(MVCPortlet.java:316)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:127)
        at com.liferay.portlet.ScriptDataPortletFilter.doFilter(ScriptDataPortletFilter.java:58)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:124)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:71)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.AsyncAttributeAdapterServlet.service(AsyncAttributeAdapterServlet.java:85)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.ServletExceptionAdapter.service(ServletExceptionAdapter.java:76)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeRender(InvokerPortletImpl.java:660)
        at com.liferay.portlet.internal.InvokerPortletImpl.render(InvokerPortletImpl.java:357)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.lambda$render$0(MonitoringInvokerPortlet.java:280)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet._render(MonitoringInvokerPortlet.java:383)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.render(MonitoringInvokerPortlet.java:278)
        at org.apache.jsp.html.portal.render_005fportlet_jsp._jspService(Unknown Source)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.DirectRequestDispatcher.include(DirectRequestDispatcher.java:64)
        at com.liferay.portal.servlet.DirectRequestDispatcherFactoryImpl$IndirectRequestDispatcher.include(DirectRequestDispatcherFactoryImpl.java:202)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:79)
        at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)
        at com.liferay.portal.servlet.TransferHeadersHelperImpl$TransferHeadersRequestDispatcher.include(TransferHeadersHelperImpl.java:162)
        at com.liferay.portlet.internal.PortletContainerImpl._render(PortletContainerImpl.java:870)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$render$2(PortletContainerImpl.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.render(PortletContainerImpl.java:205)
        at com.liferay.portlet.SecurityPortletContainerWrapper.render(SecurityPortletContainerWrapper.java:142)
        at com.liferay.portlet.RestrictPortletContainerWrapper.lambda$render$0(RestrictPortletContainerWrapper.java:126)
        at com.liferay.portlet.RestrictPortletContainerWrapper._render(RestrictPortletContainerWrapper.java:183)
        at com.liferay.portlet.RestrictPortletContainerWrapper.render(RestrictPortletContainerWrapper.java:124)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.render(PortletContainerUtil.java:212)
        at com.liferay.taglib.portletext.RuntimeTag.doTag(RuntimeTag.java:305)
        at com.liferay.taglib.portletext.RuntimeTag.doEndTag(RuntimeTag.java:342)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.endEvaluation(TagTransformModel.java:400)
        at freemarker.ext.jsp.TagTransformModel$TagWriter.onStart(TagTransformModel.java:344)
        at freemarker.core.Environment.visitAndTransform(Environment.java:422)
        at freemarker.core.UnifiedCall.accept(UnifiedCall.java:107)
        at freemarker.core.Environment.visit(Environment.java:324)
        at freemarker.core.Environment.process(Environment.java:302)
        at freemarker.template.Template.process(Template.java:325)
        at com.liferay.portal.template.freemarker.internal.FreeMarkerTemplate.processTemplate(FreeMarkerTemplate.java:123)
        at com.liferay.portal.template.AbstractSingleResourceTemplate.processTemplate(AbstractSingleResourceTemplate.java:78)
        at com.liferay.fragment.util.FragmentEntryRenderUtil._processTemplate(FragmentEntryRenderUtil.java:190)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:146)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:124)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:113)
        at com.liferay.fragment.util.FragmentEntryRenderUtil.renderFragmentEntryLink(FragmentEntryRenderUtil.java:103)
        at com.liferay.layout.content.page.editor.web.internal.portlet.action.RenderFragmentEntryMVCActionCommand.doProcessAction(RenderFragmentEntryMVCActionCommand.java:65)
        at com.liferay.portal.kernel.portlet.bridges.mvc.BaseMVCActionCommand.processAction(BaseMVCActionCommand.java:61)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:378)
        at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:97)
        at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.processAction(MVCPortlet.java:260)
        at com.liferay.portlet.internal.FilterChainImpl.doFilter(FilterChainImpl.java:77)
        at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:50)
        at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.InvokerPortletImpl.invoke(InvokerPortletImpl.java:564)
        at com.liferay.portlet.internal.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:610)
        at com.liferay.portlet.internal.InvokerPortletImpl.processAction(InvokerPortletImpl.java:299)
        at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.processAction(MonitoringInvokerPortlet.java:216)
        at com.liferay.portlet.internal.PortletContainerImpl._processAction(PortletContainerImpl.java:490)
        at com.liferay.portlet.internal.PortletContainerImpl.lambda$processAction$0(PortletContainerImpl.java:148)
        at com.liferay.portlet.internal.PortletContainerImpl._preserveGroupIds(PortletContainerImpl.java:395)
        at com.liferay.portlet.internal.PortletContainerImpl.processAction(PortletContainerImpl.java:141)
        at com.liferay.portlet.SecurityPortletContainerWrapper.processAction(SecurityPortletContainerWrapper.java:95)
        at com.liferay.portlet.RestrictPortletContainerWrapper.processAction(RestrictPortletContainerWrapper.java:78)
        at com.liferay.portal.kernel.portlet.PortletContainerUtil.processAction(PortletContainerUtil.java:118)
        at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:344)
        at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:172)
        at com.liferay.portal.struts.PortalRequestProcessor._process(PortalRequestProcessor.java:405)
        at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:154)
        at com.liferay.portal.internal.servlet.MainServlet.doPost(MainServlet.java:208)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:660)
        at com.liferay.portal.internal.servlet.MainServlet.service(MainServlet.java:620)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:712)
        at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:459)
        at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:384)
        at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:312)
        at com.liferay.friendly.url.internal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:372)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.servlet.ServletAdapter.service(ServletAdapter.java:98)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:103)
        at com.liferay.portal.apio.internal.architect.servlet.filter.APIDocumentationFilter.processFilter(APIDocumentationFilter.java:74)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:111)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.strip.StripFilter.processFilter(StripFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.i18n.I18nFilter.processFilter(I18nFilter.java:358)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.servlet.filters.password.modified.PasswordModifiedFilter.processFilter(PasswordModifiedFilter.java:58)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.secure.BaseAuthFilter.processFilter(BaseAuthFilter.java:340)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.etag.ETagFilter.processFilter(ETagFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.autologin.AutoLoginFilter.processFilter(AutoLoginFilter.java:260)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.sharepoint.SharepointFilter.processFilter(SharepointFilter.java:88)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.servlet.filters.virtualhost.VirtualHostFilter.processFilter(VirtualHostFilter.java:263)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.BaseFilter.processFilter(BaseFilter.java:144)
        at com.liferay.portal.monitoring.internal.servlet.filter.MonitoringFilter.processFilter(MonitoringFilter.java:178)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)
        at org.tuckey.web.filters.urlrewrite.UrlRewriteFilter.doFilter(UrlRewriteFilter.java:389)
        at com.liferay.portal.servlet.filters.urlrewrite.UrlRewriteFilter.processFilter(UrlRewriteFilter.java:65)
        at com.liferay.portal.kernel.servlet.BaseFilter.doFilter(BaseFilter.java:49)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDoFilter(InvokerFilterChain.java:207)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:112)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:168)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.processDirectCallFilter(InvokerFilterChain.java:188)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:96)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:491)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:764)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1388)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
Caused by: org.apache.jasper.JasperException: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:440)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:50)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilterChain.doFilter(InvokerFilterChain.java:119)
        at com.liferay.portal.kernel.servlet.filters.invoker.InvokerFilter.doFilter(InvokerFilter.java:101)
        at com.liferay.portal.osgi.web.wab.extender.internal.adapter.FilterExceptionAdapter.doFilter(FilterExceptionAdapter.java:46)
        at org.eclipse.equinox.http.servlet.internal.registration.FilterRegistration.doFilter(FilterRegistration.java:121)
        at org.eclipse.equinox.http.servlet.internal.servlet.FilterChainImpl.doFilter(FilterChainImpl.java:45)
        at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:70)
        at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
        at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
        at com.liferay.portlet.internal.PortletRequestDispatcherImpl.dispatch(PortletRequestDispatcherImpl.java:290)
        ... 237 more
Caused by: com.liferay.portal.kernel.exception.SystemException: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:94)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.sun.proxy.$Proxy507.getParticipantPowwowMeetingsCount(Unknown Source)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        ... 253 more
Caused by: java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        ... 271 more
2019-02-12 21:58:13.177 ERROR [http-nio-8080-exec-1][render_portlet_jsp:131] null
java.lang.NullPointerException
        at com.liferay.powwow.service.persistence.impl.PowwowMeetingFinderImpl.countByU_S(PowwowMeetingFinderImpl.java:60)
        at com.liferay.powwow.service.impl.PowwowMeetingLocalServiceImpl.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceImpl.java:198)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:44)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.lambda$invoke$0(TransactionInterceptor.java:61)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor._execute(DefaultTransactionExecutor.java:128)
        at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:51)
        at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:59)
        at com.liferay.portal.spring.aop.AopMethodInvocation.proceed(AopMethodInvocation.java:51)
        at com.liferay.portal.spring.aop.AopInvocationHandler.invoke(AopInvocationHandler.java:44)
        at com.liferay.powwow.service.PowwowMeetingLocalServiceUtil.getParticipantPowwowMeetingsCount(PowwowMeetingLocalServiceUtil.java:229)
        at org.apache.jsp.meetings.view_jsp._jspService(view_jsp:491)
        at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
        at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
        at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:321)
        at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:332)
        at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)