Description

java.util.ConcurrentModificationException

Exception Class

java.util.ConcurrentModificationException

(root cause)
Type java.util.ConcurrentModificationException

Message java.util.ConcurrentModificationException

Stack at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:901)
at java.util.ArrayList$Itr.next(ArrayList.java:851)
at com.pega.pegarules.data.internal.clipboard.ClipboardPageImpl.checkNamedPageForwardLinks(ClipboardPageImpl.java:5323)
at com.pega.pegarules.session.internal.mgmt.base.ThreadPageDir$PageReferenceListener.onBeforeRemove(ThreadPageDir.java:354)
at com.pega.pegarules.session.internal.mgmt.base.handler.AbstractPageHandler.onBeforeRemove(AbstractPageHandler.java:160)
at com.pega.pegarules.session.internal.mgmt.base.handler.UserPageHandler.removePage(UserPageHandler.java:77)
at com.pega.pegarules.session.internal.mgmt.base.AbstractPageDirectory.removeUserPageInCurrentDir(AbstractPageDirectory.java:343)
at com.pega.pegarules.session.internal.mgmt.base.AbstractPageDirectory.removePage(AbstractPageDirectory.java:245)
at com.pega.pegarules.session.internal.mgmt.base.AbstractPageDirectory.removePage(AbstractPageDirectory.java:383)
at com.pega.pegarules.session.internal.mgmt.base.AbstractPageDirectory.removeAllPages(AbstractPageDirectory.java:424)
at com.pega.pegarules.session.internal.mgmt.base.ThreadData.clearForReuse(ThreadData.java:505)
at com.pega.pegarules.session.internal.mgmt.PRThreadFactory.clearObject(PRThreadFactory.java:67)
at com.pega.pegarules.priv.factory.AbstractObjectFactory.releaseObject(AbstractObjectFactory.java:457)
at com.pega.pegarules.priv.factory.AbstractObjectFactory.releaseObject(AbstractObjectFactory.java:438)
at com.pega.pegarules.session.internal.mgmt.PRThreadFactory.release(PRThreadFactory.java:59)
at com.pega.pegarules.session.internal.mgmt.base.ThreadPassivation.cleanup(ThreadPassivation.java:390)
at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.cleanup(PRThreadImpl.java:211)
at com.pega.pegarules.session.internal.mgmt.base.RequestorPassivation.cleanupThread(RequestorPassivation.java:790)
at com.pega.pegarules.session.internal.mgmt.base.RequestorPassivation.removeInactiveThread(RequestorPassivation.java:713)
at com.pega.pegarules.session.internal.mgmt.PRRequestorImpl.removeInactiveThread(PRRequestorImpl.java:786)
at com.pegarules.generated.activity.ra_action_removethead_3cf854ac07d0f8da83930ce82cc407bf.step2_circum0(ra_action_removethead_3cf854ac07d0f8da83930ce82cc407bf.java:250)
at com.pegarules.generated.activity.ra_action_removethead_3cf854ac07d0f8da83930ce82cc407bf.perform(ra_action_removethead_3cf854ac07d0f8da83930ce82cc407bf.java:86)
at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:3505)
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:3362)
at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:385)
at sun.reflect.GeneratedMethodAccessor145.invoke(Unknown:Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
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:854)
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.GeneratedMethodAccessor141.invoke(Unknown:Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:370)
at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:411)
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 com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:92)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:622)
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 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:509)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1104)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:684)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.doRun(AprEndpoint.java:2508)
at org.apache.tomcat.util.net.AprEndpoint$SocketProcessor.run(AprEndpoint.java:2497)
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)

found related link Product version: pega 7.2 https://pdn.pega.com/support-articles/javautilconcurrentmodificationexception

we are using Pega version: 7.1.9, let us know we need to raise SR for this.

Thanks in Advance

Regards,

Vishnu