SA-31149

Summary

'Cannot render section' is being displayed on screen when trying to open a work object on review screen.

Error Messages

2016-12-02 00:41:23,750 [00.140.78-80-exec-13] [TABTHREAD1] [                    ] [:01.01.01] () ERROR  - Section 'FormErrorMarker' execution error on page 'pyWorkPage' of  class XYZ-ABC-CLASSNAME.
java.util.ConcurrentModificationException
    at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
    at java.util.HashMap$ValueIterator.next(Unknown Source)
    at com.pega.pegarules.data.internal.clipboard.ClipboardPageImpl.getMessageCountAll(ClipboardPageImpl.java:4463)
    at com.pegarules.generated.html.ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.include_3(ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.java:737)
    at com.pegarules.generated.html.ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.choose_1(ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.java:868)
    at com.pegarules.generated.html.ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.execute(ra_stream_reloadsection_b7c78526ceb0d576103225edbd299900.java:275)
    at com.pega.pegarules.session.internal.mgmt.Executable.getStream(Executable.java:4033)
    at com.pega.pegarules.session.internal.mgmt.Executable.getStream(Executable.java:3861)
    at com.pega.pegarules.pub.runtime.AbstractActivity.showHtml(AbstractActivity.java:247)
    at com.pegarules.generated.activity.ra_action_reloadsection_528baa0655d12e4912f2a7ffb644bfdb.step8_circum0(ra_action_reloadsection_528baa0655d12e4912f2a7ffb644bfdb.java:894)
    at com.pegarules.generated.activity.ra_action_reloadsection_528baa0655d12e4912f2a7ffb644bfdb.perform(ra_action_reloadsection_528baa0655d12e4912f2a7ffb644bfdb.java:188)
    at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:3500)
    at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(ThreadRunner.java:646)
    at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivitiesAlt(PRThreadImpl.java:461)
    at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.runActivities(HttpAPI.java:3322)
    at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:385)
    at sun.reflect.GeneratedMethodAccessor78.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1270)
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1008)
    at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:841)
    at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:331)
    at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:850)
    at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:315)
    at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:263)
    at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:240)
    at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:278)
    at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:223)
    at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:574)
    at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:374)
    at sun.reflect.GeneratedMethodAccessor77.invoke(Unknown Source)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
    at java.lang.reflect.Method.invoke(Unknown Source)
    at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:367)
    at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:408)
    at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:223)
    at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:272)
    at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:121)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:646)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:503)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:170)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:421)
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
    at java.lang.Thread.run(Unknown Source)

Steps to Reproduce

Unknown

Root Cause

In ClipboardPageImpl.getMessageCountAll() API, user is iterating on mContent and somehow changing the mContent itself , due to this it is throwing ConcurrentModificationException. 

Instead of iterating on mContent directly , one can create a copy of it by using toArray() API and then iterate on the array. This will avoid ConcurrentModifcationException. 

Resolution

Apply HFix-22829.