ConcurrentModificationException in OrbeonSessionListenerDelegate.sessionDestroyed

I'm seeing random occurrences of the exception (stack trace below) under high load conditions. I see that this same error was discussed as part of another issue in April 2011 (http://discuss.orbeon.com/Got-unexpected-request-sequence-number-td3424308.html) but a resolution wasn't posted.

Is this something that has been fixed? We are running 3.9.0.post.201409260454 PE.

thanks,
brian...

2015-04-02 07:19:42,896 497240293 ERROR [ajp-0.0.0.0-8209-1349] webapp.OrbeonSessionListener - Session Listener - Exception when running session destruction processor.
java.util.ConcurrentModificationException
at java.util.AbstractList$Itr.checkForComodification(AbstractList.java:372)
at java.util.AbstractList$Itr.next(AbstractList.java:343)
at org.orbeon.oxf.webapp.OrbeonSessionListenerDelegate.sessionDestroyed(OrbeonSessionListenerDelegate.java:64)
at org.apache.catalina.session.StandardSession.expire(StandardSession.java:686)
at org.apache.catalina.session.StandardSession.isValid(StandardSession.java:581)
at org.apache.catalina.core.ApplicationHttpRequest.getSession(ApplicationHttpRequest.java:555)
at javax.servlet.http.HttpServletRequestWrapper.getSession(HttpServletRequestWrapper.java:255)
at org.orbeon.oxf.servlet.ServletExternalContext.getSession(ServletExternalContext.java:793)
at org.orbeon.oxf.util.Connection.loadHttpState(Connection.java:309)
at org.orbeon.oxf.util.Connection.open(Connection.java:87)
at org.orbeon.oxf.processor.URIProcessorOutputImpl.readURLToStateIfNeeded(URIProcessorOutputImpl.java:399)
at org.orbeon.oxf.xforms.processor.XFormsURIResolver.resolve(XFormsURIResolver.java:96)
at org.orbeon.oxf.xforms.processor.XFormsURIResolver.readAsDom4j(XFormsURIResolver.java:123)
at org.orbeon.oxf.xforms.XFormsModel.loadInstance(XFormsModel.java:888)
at org.orbeon.oxf.xforms.XFormsModel.loadExternalInstance(XFormsModel.java:773)
at org.orbeon.oxf.xforms.XFormsModel.loadInstance(XFormsModel.java:688)
at org.orbeon.oxf.xforms.XFormsModel.doModelConstruct(XFormsModel.java:606)
at org.orbeon.oxf.xforms.XFormsModel.performDefaultAction(XFormsModel.java:511)
at org.orbeon.oxf.xforms.xbl.XBLContainer.dispatchEvent(XBLContainer.java:1060)
at org.orbeon.oxf.xforms.XFormsContainingDocument.dispatchEvent(XFormsContainingDocument.java:875)
at org.orbeon.oxf.xforms.xbl.XBLContainer.initializeModels(XBLContainer.java:362)
at org.orbeon.oxf.xforms.xbl.XBLContainer.initializeModels(XBLContainer.java:343)
at org.orbeon.oxf.xforms.XFormsContainingDocument.initialize(XFormsContainingDocument.java:1210)
at org.orbeon.oxf.xforms.XFormsContainingDocument.<init>(XFormsContainingDocument.java:216)
at org.orbeon.oxf.xforms.processor.XFormsToXHTML$3.read(XFormsToXHTML.java:167)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:365)
at org.orbeon.oxf.xforms.processor.XFormsToXHTML.doIt(XFormsToXHTML.java:147)
at org.orbeon.oxf.xforms.processor.XFormsToXHTML.access$000(XFormsToXHTML.java:53)
at org.orbeon.oxf.xforms.processor.XFormsToXHTML$1.readImpl(XFormsToXHTML.java:74)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.xinclude.XIncludeProcessor$1$2.read(XIncludeProcessor.java:120)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:365)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:330)
at org.orbeon.oxf.processor.xinclude.XIncludeProcessor$1.readImpl(XIncludeProcessor.java:114)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.xforms.processor.ResourcesAggregator$$anon$1.readImpl(ResourcesAggregator.scala:43)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor$1.readImpl(ConcreteChooseProcessor.java:126)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput$1.run(PipelineProcessor.java:574)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeParents(PipelineProcessor.java:743)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$400(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput.readImpl(PipelineProcessor.java:570)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput$1.run(PipelineProcessor.java:574)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeParents(PipelineProcessor.java:743)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$400(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput.readImpl(PipelineProcessor.java:570)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.TeeProcessor$TeeProcessorOutputImpl.readImpl(TeeProcessor.java:89)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsTinyTree(ProcessorImpl.java:286)
at org.orbeon.oxf.processor.ProcessorImpl$3.read(ProcessorImpl.java:315)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:365)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsObject(ProcessorImpl.java:330)
at org.orbeon.oxf.processor.ProcessorImpl.readCacheInputAsTinyTree(ProcessorImpl.java:313)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:185)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:247)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:247)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:247)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.getInput(PipelineProcessor.java:142)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:85)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor$1.readImpl(ConcreteChooseProcessor.java:126)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.IdentityProcessor$1.readImpl(IdentityProcessor.java:34)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.IdentityProcessor$1.readImpl(IdentityProcessor.java:34)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.IdentityProcessor$1.readImpl(IdentityProcessor.java:34)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor$1.readImpl(ConcreteChooseProcessor.java:126)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.IdentityProcessor$1.readImpl(IdentityProcessor.java:34)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor$1.readImpl(ConcreteChooseProcessor.java:126)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.IdentityProcessor$1.readImpl(IdentityProcessor.java:34)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1$1.run(PipelineProcessor.java:94)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$000(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$1.readImpl(PipelineProcessor.java:92)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor$1.readImpl(ConcreteChooseProcessor.java:126)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput$1.run(PipelineProcessor.java:574)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeParents(PipelineProcessor.java:743)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.access$400(PipelineProcessor.java:61)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$InternalTopOutput.readImpl(PipelineProcessor.java:570)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl$TopLevelOutputFilter.read(ProcessorOutputImpl.java:263)
at org.orbeon.oxf.processor.impl.ProcessorOutputImpl.read(ProcessorOutputImpl.java:406)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:260)
at org.orbeon.oxf.processor.ProcessorImpl.readInputAsSAX(ProcessorImpl.java:264)
at org.orbeon.oxf.processor.NullSerializer.start(NullSerializer.java:28)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.pipeline.choose.ConcreteChooseProcessor.start(ConcreteChooseProcessor.java:247)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor$5.run(PipelineProcessor.java:661)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.executeChildren(PipelineProcessor.java:726)
at org.orbeon.oxf.processor.pipeline.PipelineProcessor.start(PipelineProcessor.java:658)
at org.orbeon.oxf.processor.PageFlowControllerProcessor.start(PageFlowControllerProcessor.java:476)
at org.orbeon.oxf.pipeline.InitUtils.runProcessor(InitUtils.java:99)
at org.orbeon.oxf.webapp.ProcessorService.service(ProcessorService.java:97)
at org.orbeon.oxf.servlet.OrbeonServletDelegate.service(OrbeonServletDelegate.java:133)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:324)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
at org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:734)
at org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:541)
at org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:479)
at org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:407)
at org.orbeon.oxf.servlet.OrbeonXFormsFilter.doFilter(OrbeonXFormsFilter.java:123)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
at au.com.infomedix.eforms.CpfSSOSessionValidationFilter.doFilter(CpfSSOSessionValidationFilter.java:62)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
at au.com.infomedix.cpflogin.CpfSSOSessionIdFilter.doFilter(CpfSSOSessionIdFilter.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:274)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:242)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:181)
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.event(CatalinaContext.java:285)
at org.jboss.modcluster.catalina.CatalinaContext$RequestListenerValve.invoke(CatalinaContext.java:261)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:593)
at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:88)
at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:100)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:159)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.jboss.web.tomcat.service.sso.ClusteredSingleSignOn.invoke(ClusteredSingleSignOn.java:735)
at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.jboss.web.tomcat.service.request.ActiveRequestResponseCacheValve.invoke(ActiveRequestResponseCacheValve.java:53)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:362)
at org.apache.coyote.ajp.AjpProcessor.process(AjpProcessor.java:504)
at org.apache.coyote.ajp.AjpProtocol$AjpConnectionHandler.process(AjpProtocol.java:437)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:951)
at java.lang.Thread.run(Thread.java:662)

Brian,

Its is the same exception but under different conditions. Curiously I don't recall seeing this since 2011.

I can see how, in theory this could happen if a session expires just as some listeners are being added to that list. I would say that this would require a patch.

-Erik

FYI we entered an issue with some comments:

    https://github.com/orbeon/orbeon-forms/issues/2171

-Erik

This issue is now fixed and the fix will be included in Orbeon Forms 4.10.

-Erik