Error thrown when editing a workflow definition node

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: Master
• Fix Version/s: 7.0.0 DXP FP58, 7.0.0 DXP SP9, 7.0.X, 7.1.0 M1, 7.1.X, 7.2.X, Master
• Component/s: Business Productivity, Business Productivity > Kaleo Designer, Business Productivity > Kaleo Workflow Forms
• Labels:
  • QA-AUTOMATION
  • fw_test_poshi
  • liferay-dxp-70-sp9
  • liferay-fixpack-de-58-7010
• Branch Version/s:
  7.2.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal-ee/pull/19352

Steps to Reproduce

1. Go to Control Panel > Configuration > Kaleo Designer
2. Edit Single Approver workflow
3. Click Review node
4. Under Settings tab, double-click the Value box next to Notifications
5. Edit something
6. Click Save
7. Click Update

Expected result : The following should happen:

Success message notifying that the workflow has been updated, and no error

Actual result : The following actually happens:

No message, and the following error in the console logs:

2018-01-15 17:08:15.756 WARN  [http-nio-8080-exec-2][ProxyMessageListener:88] com.liferay.portal.kernel.workflow.WorkflowException: com.liferay.portal.kernel.workflow.WorkflowDefinitionFileException: Unable to parse definition
com.liferay.portal.kernel.workflow.WorkflowException: com.liferay.portal.kernel.workflow.WorkflowDefinitionFileException: Unable to parse definition
	at com.liferay.portal.workflow.kaleo.runtime.internal.DefaultWorkflowEngineImpl.validateWorkflowDefinition(DefaultWorkflowEngineImpl.java:595)
	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.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:163)
	at com.liferay.portal.spring.transaction.DefaultTransactionExecutor.execute(DefaultTransactionExecutor.java:54)
	at com.liferay.portal.spring.transaction.TransactionInterceptor.invoke(TransactionInterceptor.java:58)
	at com.liferay.portal.spring.aop.ServiceBeanMethodInvocation.proceed(ServiceBeanMethodInvocation.java:137)
	at com.liferay.portal.spring.aop.ServiceBeanAopProxy.invoke(ServiceBeanAopProxy.java:169)
	at com.sun.proxy.$Proxy470.validateWorkflowDefinition(Unknown Source)
	at com.liferay.portal.workflow.kaleo.runtime.integration.impl.internal.WorkflowDefinitionManagerImpl.validateWorkflowDefinition(WorkflowDefinitionManagerImpl.java:390)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at com.liferay.portal.kernel.messaging.proxy.ProxyRequest.execute(ProxyRequest.java:82)
	at com.liferay.portal.kernel.messaging.proxy.ProxyMessageListener.receive(ProxyMessageListener.java:58)
	at com.liferay.portal.kernel.messaging.InvokerMessageListener.receive(InvokerMessageListener.java:74)
	at com.liferay.portal.kernel.messaging.SynchronousDestination.send(SynchronousDestination.java:41)
	at com.liferay.portal.messaging.internal.sender.DirectSynchronousMessageSender.send(DirectSynchronousMessageSender.java:59)
	at com.liferay.portal.kernel.messaging.proxy.BaseProxyBean.synchronousSend(BaseProxyBean.java:88)
	at com.liferay.portal.kernel.messaging.proxy.MessagingProxyInvocationHandler.invoke(MessagingProxyInvocationHandler.java:44)
	at com.sun.proxy.$Proxy255.validateWorkflowDefinition(Unknown Source)
	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 org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:190)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:157)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
	at com.liferay.portal.workflow.WorkflowLinkAdvice.invoke(WorkflowLinkAdvice.java:58)
	at sun.reflect.GeneratedMethodAccessor830.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.aspectj.MethodInvocationProceedingJoinPoint.proceed(MethodInvocationProceedingJoinPoint.java:85)
	at com.liferay.portal.workflow.WorkflowLockingAdvice.invoke(WorkflowLockingAdvice.java:65)
	at sun.reflect.GeneratedMethodAccessor829.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethodWithGivenArgs(AbstractAspectJAdvice.java:621)
	at org.springframework.aop.aspectj.AbstractAspectJAdvice.invokeAdviceMethod(AbstractAspectJAdvice.java:610)
	at org.springframework.aop.aspectj.AspectJAroundAdvice.invoke(AspectJAroundAdvice.java:68)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:92)
	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:179)
	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:207)
	at com.sun.proxy.$Proxy256.validateWorkflowDefinition(Unknown Source)
	at com.liferay.portal.workflow.kaleo.designer.web.internal.portlet.action.PublishKaleoDefinitionVersionMVCActionCommand.validateWorkflowDefinition(PublishKaleoDefinitionVersionMVCActionCommand.java:110)
	at com.liferay.portal.workflow.kaleo.designer.web.internal.portlet.action.PublishKaleoDefinitionVersionMVCActionCommand.doProcessAction(PublishKaleoDefinitionVersionMVCActionCommand.java:77)
	at com.liferay.portal.workflow.kaleo.designer.web.internal.portlet.action.AddKaleoDefinitionVersionMVCActionCommand.processAction(AddKaleoDefinitionVersionMVCActionCommand.java:78)
	at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.callActionMethod(MVCPortlet.java:380)
	at com.liferay.portal.kernel.portlet.LiferayPortlet.processAction(LiferayPortlet.java:94)
	at com.liferay.portal.kernel.portlet.bridges.mvc.MVCPortlet.processAction(MVCPortlet.java:260)
	at com.liferay.portlet.FilterChainImpl.doFilter(FilterChainImpl.java:71)
	at com.liferay.portal.kernel.portlet.PortletFilterUtil.doFilter(PortletFilterUtil.java:48)
	at com.liferay.portal.kernel.servlet.PortletServlet.service(PortletServlet.java:108)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	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:117)
	at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
	at com.liferay.portlet.InvokerPortletImpl.invoke(InvokerPortletImpl.java:535)
	at com.liferay.portlet.InvokerPortletImpl.invokeAction(InvokerPortletImpl.java:581)
	at com.liferay.portlet.InvokerPortletImpl.processAction(InvokerPortletImpl.java:335)
	at com.liferay.portal.monitoring.internal.portlet.MonitoringInvokerPortlet.processAction(MonitoringInvokerPortlet.java:189)
	at com.liferay.portlet.PortletContainerImpl._processAction(PortletContainerImpl.java:394)
	at com.liferay.portlet.PortletContainerImpl.processAction(PortletContainerImpl.java:120)
	at com.liferay.portlet.SecurityPortletContainerWrapper.processAction(SecurityPortletContainerWrapper.java:94)
	at com.liferay.portlet.RestrictPortletContainerWrapper.processAction(RestrictPortletContainerWrapper.java:75)
	at com.liferay.portal.kernel.portlet.PortletContainerUtil.processAction(PortletContainerUtil.java:114)
	at com.liferay.portal.action.LayoutAction.processLayout(LayoutAction.java:295)
	at com.liferay.portal.action.LayoutAction.execute(LayoutAction.java:159)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:425)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:228)
	at com.liferay.portal.struts.PortalRequestProcessor.process(PortalRequestProcessor.java:170)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1913)
	at org.apache.struts.action.ActionServlet.doPost(ActionServlet.java:462)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:648)
	at com.liferay.portal.servlet.MainServlet.callParentService(MainServlet.java:604)
	at com.liferay.portal.servlet.MainServlet.service(MainServlet.java:581)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	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.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:100)
	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.SecureFilter.processFilter(SecureFilter.java:337)
	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:181)
	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:100)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:720)
	at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:466)
	at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:391)
	at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:318)
	at com.liferay.friendly.url.internal.servlet.FriendlyURLServlet.service(FriendlyURLServlet.java:355)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at com.liferay.portal.servlet.ServletAdapter.service(ServletAdapter.java:98)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:729)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:292)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	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.servlet.filters.uploadservletrequest.UploadServletRequestFilter.processFilter(UploadServletRequestFilter.java:100)
	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.gzip.GZipFilter.processFilter(GZipFilter.java:125)
	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.SecureFilter.processFilter(SecureFilter.java:337)
	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:364)
	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:86)
	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:261)
	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:270)
	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:181)
	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:394)
	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:100)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:240)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:207)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:212)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:106)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:141)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:88)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1500)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1456)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: com.liferay.portal.kernel.workflow.WorkflowDefinitionFileException: Unable to parse definition
	at com.liferay.portal.workflow.kaleo.definition.internal.parser.XMLWorkflowModelParser.parse(XMLWorkflowModelParser.java:85)
	at com.liferay.portal.workflow.kaleo.runtime.internal.DefaultWorkflowEngineImpl.validateWorkflowDefinition(DefaultWorkflowEngineImpl.java:588)
	... 211 more
Caused by: com.liferay.portal.kernel.xml.DocumentException: Error on line 121 of document  : cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'. Nested exception: cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'.
	at com.liferay.portal.xml.SAXReaderImpl.read(SAXReaderImpl.java:375)
	at com.liferay.portal.kernel.xml.SAXReaderUtil.read(SAXReaderUtil.java:151)
	at com.liferay.portal.workflow.kaleo.definition.internal.parser.XMLWorkflowModelParser.parse(XMLWorkflowModelParser.java:80)
	... 212 more
Caused by: org.dom4j.DocumentException: Error on line 121 of document  : cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'. Nested exception: cvc-datatype-valid.1.2.1: '' is not a valid value for 'integer'.
	at org.dom4j.io.SAXReader.read(SAXReader.java:482)
	at org.dom4j.io.SAXReader.read(SAXReader.java:343)
	at com.liferay.portal.xml.SAXReaderImpl.read(SAXReaderImpl.java:372)
	... 214 more

Reproduced on :
 Tomcat 8.0 + MySQL 5.7
Portal master GIT ID commit bae0a0696f5ad12d1b77676de512bdd30f883cae

Portal master-private GIT ID commit 1dc5f432b11477c91e0e02795165c7f73a5523c2