Martin Styk created WFLY-10986: ---------------------------------- Summary: Concurrent Modification Exception when starting server with external JMS broker Key: WFLY-10986 URL: https://issues.jboss.org/browse/WFLY-10986 Project: WildFly Issue Type: Bug Components: JMS Affects Versions: 14.0.1.Final Reporter: Martin Styk Assignee: Jeff Mesnil Priority: Blocker Start of a WildFly with resource adapter configured to remote messaging broker sometimes fails with following error. {code} ERROR [org.jboss.msc.service.fail] (MSC service thread 1-4) MSC000001: Failed to start service jboss.resourceadapters.ra."wmq.jmsra".CF: org.jboss.msc.service.StartException in service jboss.resourceadapters.ra."wmq.jmsra".CF: Failed to start service at org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1728) at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1556) at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1985) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1487) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1364) at java.lang.Thread.run(Thread.java:748) Caused by: java.util.ConcurrentModificationException at java.util.ArrayList$Itr.checkForComodification(ArrayList.java:909) at java.util.ArrayList$Itr.next(ArrayList.java:859) at java.util.Collections$UnmodifiableCollection$1.next(Collections.java:1042) at org.jboss.as.connector.metadata.api.resourceadapter.ActivationSecurityUtil.isLegacySecurityRequired(ActivationSecurityUtil.java:41) at org.jboss.as.connector.subsystems.resourceadapters.ConnectionDefinitionService.start(ConnectionDefinitionService.java:68) at org.jboss.msc.service.ServiceControllerImpl$StartTask.startService(ServiceControllerImpl.java:1736) at org.jboss.msc.service.ServiceControllerImpl$StartTask.execute(ServiceControllerImpl.java:1698) ... 6 more {code} This issue was introduced in fix for WFLY-9978 in [this commit |https://github.com/ehsavoie/wildfly/commit/8d35c77130c8ba8c47008e1de1225971fa5d8c2e] -- This message was sent by Atlassian JIRA (v7.5.0#75005)