Use of EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap.toArray() is not thread safe and should be replace with java.util.concurrent.ConcurrentHashMap when using MQ transactions. ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ Key: JBAS-4697 URL: http://jira.jboss.com/jira/browse/JBAS-4697 Project: JBoss Application Server Issue Type: Bug Security Level: Public (Everyone can see) Components: JMS service Affects Versions: JBossAS-4.2.0.GA Reporter: Jay Howell Assigned To: Adrian Brock Fix For: JBossAS-4.2.2.GA Custom Transaction engine throws the following exception... SEVERE: TransactionManager org.jboss.mq.SpyXAException: Resource manager error during recover; - nested throwable: (org.jboss.mq.SpyJMSException: Cannot recover; - nested throwable: (java.util.NoSuchElementException)) at org.jboss.mq.SpyXAException.getAsXAException(SpyXAException.java:72) at org.jboss.mq.SpyXAResource.recover(SpyXAResource.java:166) at org.jboss.resource.connectionmanager.xa.JcaXAResourceWrapper.recover(JcaXAResourceWrapper.java:98) at com.gs.fw.aig.ljtm.LJTMTransactionManager.tryToRecover(LJTMTransactionManager.java:941) Caused by: org.jboss.mq.SpyJMSException: Cannot recover; - nested throwable: (java.util.NoSuchElementException) at org.jboss.mq.SpyJMSException.getAsJMSException(SpyJMSException.java:72) at org.jboss.mq.SpyJMSException.rethrowAsJMSException(SpyJMSException.java:57) at org.jboss.mq.Connection.recover(Connection.java:1142) at org.jboss.mq.SpyXAResourceManager.recover(SpyXAResourceManager.java:325) at org.jboss.mq.SpyXAResource.recover(SpyXAResource.java:162) ... 76 more Caused by: java.util.NoSuchElementException at EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap$HashIterator.next(ConcurrentHashMap.java:1131) at java.util.AbstractCollection.toArray(AbstractCollection.java:176) at org.jboss.mq.pm.TxManager.recover(TxManager.java:317) at org.jboss.mq.server.JMSDestinationManager.recover(JMSDestinationManager.java:502) at org.jboss.mq.server.JMSServerInterceptorSupport.recover(JMSServerInterceptorSupport.java:197) at org.jboss.mq.server.JMSServerInterceptorSupport.recover(JMSServerInterceptorSupport.java:197) at org.jboss.mq.server.TracingInterceptor.recover(TracingInterceptor.java:769) at org.jboss.mq.server.JMSServerInvoker.recover(JMSServerInvoker.java:203) at org.jboss.mq.il.jvm.JVMServerIL.recover(JVMServerIL.java:188) at org.jboss.mq.Connection.recover(Connection.java:1137) ... 78 more The EDU.oswego.cs.dl.util.concurrent.ConcurrentHashMap.toArray() calls values() which is not thread safe. This needs to be switched to java.util.concurrent.ConcurrentHashMap. The class org.jboss.mq.pm.TxManager needs to be changed to use java.util.concurrent.ConcurrentHashMap. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.jboss.com/jira/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira