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From "Martin Haslinger (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-1995) Exception "The Consumer is closed" in multithreaded environment
Date Wed, 05 Nov 2008 14:31:06 GMT
Exception "The Consumer is closed" in multithreaded environment
---------------------------------------------------------------

                 Key: AMQ-1995
                 URL: https://issues.apache.org/activemq/browse/AMQ-1995
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.2.0, 5.1.0
         Environment: Windows XP, JRE 1.5.0_12, 2GB Memory, Dual-core
            Reporter: Martin Haslinger


I got the following exception when running the TempQueueMemoryTest and increasing number of
producer, consumers and messages:

javax.jms.IllegalStateException: The Consumer is closed
	at org.apache.activemq.ActiveMQMessageConsumer.checkClosed(ActiveMQMessageConsumer.java:699)
	at org.apache.activemq.ActiveMQMessageConsumer.getMessageListener(ActiveMQMessageConsumer.java:339)
	at org.apache.activemq.ActiveMQSession.checkMessageListener(ActiveMQSession.java:1864)
	at org.apache.activemq.ActiveMQMessageConsumer.checkMessageListener(ActiveMQMessageConsumer.java:717)
	at org.apache.activemq.ActiveMQMessageConsumer.receive(ActiveMQMessageConsumer.java:457)
	at TempQueueMemoryTest$1Producer.run(TempQueueMemoryTest.java:94)

The error happens at "Message reply = consumer.receive();", the message is not received.

I increased the number of consumers and produceres to 2 and the number of messages to 5000.
When using larger numbers the exception is thrown more often (unpredictable how often exactly).
It definitly seems to be a multithreading-related problem because it only happens with multiple
threads producing/consuming and the more threads you have the more often it happens.

Tested with 5.2 RC2.

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