Found one Java-level deadlock: ============================= "Thread-20": waiting for ownable synchronizer 0xb22a2e58, (a java.util.concurrent.locks.ReentrantLock$NonfairSync), which is held by "http-127.0.0.1-8080-1" "http-127.0.0.1-8080-1": waiting to lock monitor 0x4e200ef4 (object 0xaa937ab0, a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction), which is held by "Thread-20" Java stack information for the threads listed above: =================================================== "Thread-20": at sun.misc.Unsafe.park(Native Method) - parking to wait for <0xb22a2e58> (a java.util.concurrent.locks.ReentrantLock$NonfairSync) at java.util.concurrent.locks.LockSupport.park(LockSupport.java:158) at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:747) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireQueued(AbstractQueuedSynchronizer.java:778) at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquire(AbstractQueuedSynchronizer.java:1114) at java.util.concurrent.locks.ReentrantLock$NonfairSync.lock(ReentrantLock.java:186) at java.util.concurrent.locks.ReentrantLock.lock(ReentrantLock.java:262) at org.jboss.resource.adapter.jdbc.BaseWrapperManagedConnection.lock(BaseWrapperManagedConnection.java:253) at org.jboss.resource.adapter.jdbc.local.LocalManagedConnection.rollback(LocalManagedConnection.java:87) at org.jboss.resource.connectionmanager.TxConnectionManager$LocalXAResource.rollback(TxConnectionManager.java:1182) at com.arjuna.ats.internal.jta.resources.arjunacore.XAOnePhaseResource.rollback(XAOnePhaseResource.java:138) at com.arjuna.ats.arjuna.LastResourceRecord.topLevelAbort(LastResourceRecord.java:143) at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:3270) at com.arjuna.ats.arjuna.coordinator.BasicAction.doAbort(BasicAction.java:3248) at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1933) - locked <0xaa937ab0> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction) at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:114) at com.arjuna.ats.arjuna.AtomicAction.cancel(AtomicAction.java:213) at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.rollback(TransactionImple.java:332) at knrc.db.TestDeadlockConnectionHandler$1.run(TestDeadlockConnectionHandler.java:50) at java.lang.Thread.run(Thread.java:619) "http-127.0.0.1-8080-1": at com.arjuna.ats.arjuna.coordinator.BasicAction.Abort(BasicAction.java:1881) - waiting to lock <0xaa937ab0> (a com.arjuna.ats.internal.jta.transaction.arjunacore.AtomicAction) at com.arjuna.ats.arjuna.coordinator.TwoPhaseCoordinator.cancel(TwoPhaseCoordinator.java:114) at com.arjuna.ats.arjuna.AtomicAction.abort(AtomicAction.java:184) at com.arjuna.ats.internal.jta.transaction.arjunacore.TransactionImple.rollbackAndDisassociate(TransactionImple.java:1505) at com.arjuna.ats.internal.jta.transaction.arjunacore.BaseTransaction.rollback(BaseTransaction.java:165) at com.arjuna.ats.jbossatx.BaseTransactionManagerDelegate.rollback(BaseTransactionManagerDelegate.java:114) at knrc.deadlock.TriggerDeadlockService.triggerDeadlock(TriggerDeadlockService.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157) at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96) at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:264) at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:668) at org.jboss.jmx.adaptor.control.Server.invokeOpByName(Server.java:258) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet$4.run(HtmlAdaptorServlet.java:391) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet$4.run(HtmlAdaptorServlet.java:388) at java.security.AccessController.doPrivileged(Native Method) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOpByName(HtmlAdaptorServlet.java:387) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.invokeOpByName(HtmlAdaptorServlet.java:312) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.processRequest(HtmlAdaptorServlet.java:106) at org.jboss.jmx.adaptor.html.HtmlAdaptorServlet.doGet(HtmlAdaptorServlet.java:81) at javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.jboss.web.tomcat.filters.ReplyHeaderFilter.doFilter(ReplyHeaderFilter.java:96) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206) at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:235) at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at org.jboss.web.tomcat.security.SecurityAssociationValve.invoke(SecurityAssociationValve.java:183) at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:525) at org.jboss.web.tomcat.security.JaccContextValve.invoke(JaccContextValve.java:95) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.process(SecurityContextEstablishmentValve.java:126) at org.jboss.web.tomcat.security.SecurityContextEstablishmentValve.invoke(SecurityContextEstablishmentValve.java:70) at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127) at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at org.jboss.web.tomcat.service.jca.CachedConnectionValve.invoke(CachedConnectionValve.java:158) at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:330) at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:829) at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:598) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:451) at java.lang.Thread.run(Thread.java:619) Found 1 deadlock.