[jboss-user] [Messaging, JMS & JBossMQ] - Unable to browse messages in queue LRUCache error

tnine do-not-reply at jboss.com
Thu Dec 13 09:57:58 EST 2007


Hi all,
  I'm attempting to browse the DLQ in Jboss MQ in order to log the messages for inspection and review by our developers.  I'm getting a very strange error when I try to get an enumeration.  I'm connecting to remote queue via JNDI

Enumeration queueContents = browser.getEnumeration();

Causes the following error below.  I'm assuming this is a duplicate hashcode issue, but how can I change the implementation so that collisions don't occur?


  | org.jboss.mq.SpyJMSException: Cannot browse the Queue; - nested throwable: (java.lang.RuntimeException: Can't add object '2 msg=232 STORED PERSISTENT queue=QUEUE.DLQ priority=4 lateClone=false hashCode=22159791' to LRUCache that is already in cache.)
  | 	at org.jboss.mq.SpyJMSException.getAsJMSException(SpyJMSException.java:66)
  | 	at org.jboss.mq.SpyJMSException.rethrowAsJMSException(SpyJMSException.java:51)
  | 	at org.jboss.mq.Connection.browse(Connection.java:861)
  | 	at org.jboss.mq.SpyQueueBrowser.getEnumeration(SpyQueueBrowser.java:83)
  | 	at com.purdueefcu.statements.writer.jms.QueueInspectorImpl.getQueueContents(QueueInspectorImpl.java:81)
  | 	at com.purdueefcu.statements.writer.jms.QueueInspectorImpl.getFailedProcessMessages(QueueInspectorImpl.java:41)
  | 	at com.purdueefcu.statements.QueueInspectorTest.testGetFailedProcessMessages(QueueInspectorTest.java:16)
  | 	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:585)
  | 	at junit.framework.TestCase.runTest(TestCase.java:154)
  | 	at junit.framework.TestCase.runBare(TestCase.java:127)
  | 	at org.springframework.test.ConditionalTestCase.runBare(ConditionalTestCase.java:69)
  | 	at junit.framework.TestResult$1.protect(TestResult.java:106)
  | 	at junit.framework.TestResult.runProtected(TestResult.java:124)
  | 	at junit.framework.TestResult.run(TestResult.java:109)
  | 	at junit.framework.TestCase.run(TestCase.java:118)
  | 	at junit.framework.TestSuite.runTest(TestSuite.java:208)
  | 	at junit.framework.TestSuite.run(TestSuite.java:203)
  | 	at org.eclipse.jdt.internal.junit.runner.junit3.JUnit3TestReference.run(JUnit3TestReference.java:130)
  | 	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
  | 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:460)
  | 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:673)
  | 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:386)
  | 	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:196)
  | Caused by: java.lang.RuntimeException: Can't add object '2 msg=232 STORED PERSISTENT queue=QUEUE.DLQ priority=4 lateClone=false hashCode=22159791' to LRUCache that is already in cache.
  | 	at org.jboss.mq.server.MessageCache$LRUCache.addMostRecent(MessageCache.java:791)
  | 	at org.jboss.mq.server.MessageCache.messageReferenceUsedEvent(MessageCache.java:401)
  | 	at org.jboss.mq.server.MessageReference.getMessage(MessageReference.java:168)
  | 	at org.jboss.mq.server.MessageReference.getMessageForDelivery(MessageReference.java:147)
  | 	at org.jboss.mq.server.BasicQueue.browse(BasicQueue.java:509)
  | 	at org.jboss.mq.server.JMSQueue.browse(JMSQueue.java:161)
  | 	at org.jboss.mq.server.JMSDestinationManager.browse(JMSDestinationManager.java:597)
  | 	at org.jboss.mq.server.JMSServerInterceptorSupport.browse(JMSServerInterceptorSupport.java:136)
  | 	at org.jboss.mq.security.ServerSecurityInterceptor.browse(ServerSecurityInterceptor.java:99)
  | 	at org.jboss.mq.server.TracingInterceptor.browse(TracingInterceptor.java:418)
  | 	at org.jboss.mq.server.JMSServerInvoker.browse(JMSServerInvoker.java:142)
  | 	at org.jboss.mq.il.uil2.ServerSocketManagerHandler.handleMsg(ServerSocketManagerHandler.java:116)
  | 	at org.jboss.mq.il.uil2.SocketManager$ReadTask.handleMsg(SocketManager.java:395)
  | 	at org.jboss.mq.il.uil2.msgs.BaseMsg.run(BaseMsg.java:398)
  | 	at EDU.oswego.cs.dl.util.concurrent.PooledExecutor$Worker.run(PooledExecutor.java:748)
  | 	at java.lang.Thread.run(Thread.java:595)
  | 
  | 

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