UnsupportedOperationException in several DUPs on undeploy --------------------------------------------------------- Key: WFLY-12855 URL: https://issues.redhat.com/browse/WFLY-12855 Project: WildFly Issue Type: Bug Affects Versions: No Release Reporter: Paul Ferraro Assignee: Paul Ferraro Priority: Major Due to changes in the backing collection type for AttachmentLists, removeIf(...) is no longer supported. {noformat} 2019-12-06 12:10:03,346 ERROR [org.jboss.as.server.deployment] (MSC service thread 1-1) WFLYSRV0043: Deployment unit processor org.jboss.as.connector.deployers.ra.processors.CachedConnectionManagerSetupProcessor@4786eb0d unexpectedly threw an exception during undeploy phase POST_MODULE of deployment "SyncCircuitBreakerDisabledTest.war": java.lang.UnsupportedOperationException at java.util.concurrent.CopyOnWriteArrayList$COWIterator.remove(CopyOnWriteArrayList.java:1178) at java.util.Collections$CheckedCollection$1.remove(Collections.java:3079) at java.util.Collection.removeIf(Collection.java:415) at org.jboss.as.connector.deployers.ra.processors.CachedConnectionManagerSetupProcessor.undeploy(CachedConnectionManagerSetupProcessor.java:75) at org.jboss.as.server.deployment.DeploymentUnitPhaseService.safeUndeploy(DeploymentUnitPhaseService.java:245) at org.jboss.as.server.deployment.DeploymentUnitPhaseService.stop(DeploymentUnitPhaseService.java:238) at org.jboss.msc.service.ServiceControllerImpl$StopTask.stopService(ServiceControllerImpl.java:1795) at org.jboss.msc.service.ServiceControllerImpl$StopTask.execute(ServiceControllerImpl.java:1764) at org.jboss.msc.service.ServiceControllerImpl$ControllerTask.run(ServiceControllerImpl.java:1559) at org.jboss.threads.ContextClassLoaderSavingRunnable.run(ContextClassLoaderSavingRunnable.java:35) at org.jboss.threads.EnhancedQueueExecutor.safeRun(EnhancedQueueExecutor.java:1982) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.doRunTask(EnhancedQueueExecutor.java:1486) at org.jboss.threads.EnhancedQueueExecutor$ThreadBody.run(EnhancedQueueExecutor.java:1377) at java.lang.Thread.run(Thread.java:748) {noformat}