Intermittent NullPointerException during reindex after performing an upgrade

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.1.X, 7.2.X, 7.3.X, Master
• Fix Version/s: 7.1.10 DXP FP20, 7.1.10.5 SP5, 7.1.X, 7.2.X, 7.3.1 CE GA2, 7.3.2 CE GA3, 7.3.10 DXP GA1, Master
• Component/s: Search Infrastructure
• Labels:
  • QA-AUTOMATION
  • flaky_test_search
  • liferay-dxp-71-sp5
  • liferay-fixpack-dxp-20-7110
  • liferay-fixpack-dxp-9-7210
• Branch Version/s:
  7.2.x, 7.1.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Epic Link: Flow Forward
• Sprint: Search|S03 Sprint 13| 3.16-4.6, Search|S03 Sprint 14| 4.6-4.27, Search|S03 Sprint 15|4.28-5.18
• Git Pull Request: https://github.com/oliv-yu/liferay-portal/pull/38
• Bug Type: Regression Bug

Incidences:

Date	Test Name	Location	Full Console
2/10/2020	PortalSmokeUpgrade#ViewPortalSmokeArchive70106	EE Pull Request	02102020
2/19/2020	PortalSmokeUpgrade#ViewPortalSmokeArchive730	EE Pull Request	02192020
2/20/2020	PortalSmokeUpgrade#ViewPortalSmokeArchive70106	EE Pull Request	02202020
2/27/2020	PortalSmokeUpgrade#ViewPortalSmokeArchive7110	EE Pull Request	02272020
3/10/2020	PortalSmokeUpgrade#ViewPortalSmokeArchive7110	EE Pull Request	03102020

Some PortalSmokeUpgrades tests run into the following exception when performing a full reindex via search admin. This doesn't seem to have any functional impact as the tests complete without issue and only fail when asserting the logs.

    [exec] 18:30:57,238 ERROR [http-nio-8080-exec-10][IncludeTag:128] Current URL /group/control_panel/manage?p_p_id=com_liferay_portal_search_admin_web_portlet_SearchAdminPortlet&p_p_lifecycle=0&p_p_state=maximized&p_p_mode=view&_com_liferay_portal_search_admin_web_portlet_SearchAdminPortlet_mvcRenderCommandName=%2Fsearch_admin%2Fview&_com_liferay_portal_search_admin_web_portlet_SearchAdminPortlet_tabs1=index-actions generates exception: java.lang.NullPointerException
     [exec] java.lang.NullPointerException
     [exec] 	at com.liferay.portal.kernel.backgroundtask.display.BaseBackgroundTaskDisplay.getBackgroundTaskStatusAttributeLong(BaseBackgroundTaskDisplay.java:146)
     [exec] 	at com.liferay.portal.search.internal.background.task.display.ReindexBackgroundTaskDisplay.getPercentage(ReindexBackgroundTaskDisplay.java:37)
     [exec] 	at com.liferay.portal.kernel.backgroundtask.display.BaseBackgroundTaskDisplay.hasPercentage(BaseBackgroundTaskDisplay.java:90)
     [exec] 	at org.apache.jsp.index_005factions_jsp._jspService(index_005factions_jsp.java:299)
     [exec] 	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:111)
     [exec] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
     [exec] 	at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:411)
     [exec] 	at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:473)
     [exec] 	at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:377)
     [exec] 	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
     [exec] 	at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:373)
     [exec] 	at com.liferay.portal.osgi.web.servlet.jsp.compiler.internal.JspServlet.service(JspServlet.java:385)
     [exec] 	at org.eclipse.equinox.http.servlet.internal.registration.EndpointRegistration.service(EndpointRegistration.java:153)
     [exec] 	at org.eclipse.equinox.http.servlet.internal.servlet.ResponseStateHandler.processRequest(ResponseStateHandler.java:62)
     [exec] 	at org.eclipse.equinox.http.servlet.internal.context.DispatchTargets.doDispatch(DispatchTargets.java:120)
     [exec] 	at org.eclipse.equinox.http.servlet.internal.servlet.RequestDispatcherAdaptor.include(RequestDispatcherAdaptor.java:48)
     [exec] 	at com.liferay.portal.servlet.DirectServletPathRegisterDispatcher.include(DirectServletPathRegisterDispatcher.java:67)
     [exec] 	at com.liferay.portal.servlet.DirectRequestDispatcherFactoryImpl$IndirectRequestDispatcher.include(DirectRequestDispatcherFactoryImpl.java:190)
     [exec] 	at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.doDispatch(ClassLoaderRequestDispatcherWrapper.java:79)
     [exec] 	at com.liferay.portal.servlet.ClassLoaderRequestDispatcherWrapper.include(ClassLoaderRequestDispatcherWrapper.java:53)