IllegalStateException: java.util.ConcurrentModificationException ---------------------------------------------------------------- Key: WFLY-10920 URL: https://issues.jboss.org/browse/WFLY-10920 Project: WildFly Issue Type: Bug Components: MP Config Affects Versions: 14.0.1.Final, 14.0.0.Final Reporter: tommaso borgato Assignee: Jeff Mesnil Attachments: clusterbench-ee7-shared-sessions.ear, clusterbench-ee7.ear, perf18-consoleText.txt One of the many affected scenarios is [perflab_eap-7x-failover-http-session-shutdown-dist-sync-shared-sessions|h...]: it is a 4 nodes (running with the standalone-ha.xml configuration) fail-over scenario where the deployed EAR contains two WAR sharing http sessions: {{clusterbench-ee7-shared-sessions.ear/META-INF/jboss-all.xml}}: {noformat} <jboss umlns="urn:jboss:1.0"> <shared-session-config xmlns="urn:jboss:shared-session-config:1.0"> <session-config> <cookie-config> <path>/</path> </cookie-config> </session-config> </shared-session-config> </jboss> {noformat} During server shut-down the EAR is stopped and we observe the following error: {noformat} [JBossINF] 05:49:46,803 INFO [org.jboss.as.clustering.infinispan] (ServerService Thread Pool -- 99) WFLYCLINF0003: Stopped clusterbench-ee7-shared-sessions.ear cache from web container [JBossINF] 05:49:46,805 INFO [org.infinispan.remoting.transport.jgroups.JGroupsTransport] (MSC service thread 1-1) ISPN000080: Disconnecting JGroups channel ejb [JBossINF] 05:49:46,813 ERROR [org.jboss.as.server.deployment] (MSC service thread 1-6) WFLYSRV0043: Deployment unit processor org.wildfly.extension.microprofile.config.smallrye.deployment.SubsystemDeploymentProcessor@6953f688 unexpectedly threw an exception during undeploy phase POST_MODULE of subdeployment "clusterbench-ee7-web-default-2.war" of deployment "clusterbench-ee7-shared-sessions.ear": java.util.ConcurrentModificationException [JBossINF] at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) [JBossINF] at java.util.HashMap$EntryIterator.next(HashMap.java:1476) [JBossINF] at java.util.HashMap$EntryIterator.next(HashMap.java:1474) [JBossINF] at io.smallrye.config.SmallRyeConfigProviderResolver.releaseConfig(SmallRyeConfigProviderResolver.java:71) [JBossINF] at org.wildfly.extension.microprofile.config.smallrye.deployment.SubsystemDeploymentProcessor.undeploy(SubsystemDeploymentProcessor.java:102) [JBossINF] at org.jboss.as.server.deployment.DeploymentUnitPhaseService.safeUndeploy(DeploymentUnitPhaseService.java:211) [JBossINF] at org.jboss.as.server.deployment.DeploymentUnitPhaseService.stop(DeploymentUnitPhaseService.java:204) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1792) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$StopTask.execute(ServiceControllerImpl.java:1761) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1556) [JBossINF] at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378) [JBossINF] at java.lang.Thread.run(Thread.java:748) [JBossINF] [JBossINF] 05:49:46,812 ERROR [org.jboss.as.server.deployment] (MSC service thread 1-4) WFLYSRV0043: Deployment unit processor org.wildfly.extension.microprofile.config.smallrye.deployment.SubsystemDeploymentProcessor@6953f688 unexpectedly threw an exception during undeploy phase POST_MODULE of subdeployment "clusterbench-ee7-web-default-1.war" of deployment "clusterbench-ee7-shared-sessions.ear": java.util.ConcurrentModificationException [JBossINF] at java.util.HashMap$HashIterator.nextNode(HashMap.java:1442) [JBossINF] at java.util.HashMap$EntryIterator.next(HashMap.java:1476) [JBossINF] at java.util.HashMap$EntryIterator.next(HashMap.java:1474) [JBossINF] at io.smallrye.config.SmallRyeConfigProviderResolver.releaseConfig(SmallRyeConfigProviderResolver.java:71) [JBossINF] at org.wildfly.extension.microprofile.config.smallrye.deployment.SubsystemDeploymentProcessor.undeploy(SubsystemDeploymentProcessor.java:102) [JBossINF] at org.jboss.as.server.deployment.DeploymentUnitPhaseService.safeUndeploy(DeploymentUnitPhaseService.java:211) [JBossINF] at org.jboss.as.server.deployment.DeploymentUnitPhaseService.stop(DeploymentUnitPhaseService.java:204) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1792) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$StopTask.execute(ServiceControllerImpl.java:1761) [JBossINF] at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1556) [JBossINF] at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487) [JBossINF] at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1378) [JBossINF] at java.lang.Thread.run(Thread.java:748) {noformat} Also other scenarios like [perflab_eap-7x-failover-http-session-shutdown-dist-sync-nb-state-transfer...] and [perflab_eap-7x-failover-remote-jdg-session-shutdown-invalidation-sync-hot...] exhibits the same error: I assume it does not depend on the shared sessions configuration mentioned above; Find attached: - the complete server log (perf18-consoleText.txt) - the EAR used for the shared-sessions scenario (clusterbench-ee7-shared-sessions.ear) - the EAR used for the [perflab_eap-7x-failover-http-session-shutdown-dist-sync-nb-state-transfer...] scenario (clusterbench-ee7.ear)