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From "TH L. (JIRA)" <j...@apache.org>
Subject [jira] Created: (AMQ-2716) ActiveMQConnection leaks memory by caching ActiveMQTempQueue objects
Date Thu, 29 Apr 2010 08:27:31 GMT
ActiveMQConnection leaks memory by caching ActiveMQTempQueue objects
--------------------------------------------------------------------

                 Key: AMQ-2716
                 URL: https://issues.apache.org/activemq/browse/AMQ-2716
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker, Geronimo Integration, JMS client, Transport
    Affects Versions: 5.3.0
         Environment: 64bit, SuSE 10, Sun Java 1.6.0_17, Geronimo 2.2, embedded AMQ 5.3
            Reporter: TH L.
            Priority: Critical


After running messaging several hours with about 2,000,000 asynchronous send and about 1,000,000
synchronous send/reply (with temp Queue), I found about 1.5G ActiveMQConnection objects in
my whole 2G memory heap (inspected with jmap and Eclipse Memory Analyzer).

The 1.5G ActiveMQConnection objects and their referencing objects stay in heap old generation
and cannot be cleaned by GC.

By looking into those ActiveMQConnections, I found there are a huge amount of HashMaps holding
temp Queue information (e.g. ActiveMQTempQueue with different sequenceId, physicalName, etc.)

Since the ActiveMQConnections are pooled, however, why those ActiveMQTempQueues are always
kept in ActiveMQConnections?

is that a bug? or did I do something wrong (wrong setup, wrong client code)?

My client code
{{{
        QueueConnection connection = null;
        QueueSession session = null;
        Queue requestQueue = null;
        Queue replyQueue = null;
        QueueReceiver receiver = null;
        QueueSender sender = null;

        try {
            connection = aConnFactory.createQueueConnection();
            connection.start();
            session = connection.createQueueSession(false, Session.AUTO_ACKNOWLEDGE);
            requestQueue = getDestinationQueue();
            sender = session.createSender(requestQueue);
            replyQueue = session.createTemporaryQueue(); // using temp queue
            aRequestMessage.setJMSReplyTo(replyQueue);
            sender.send(aRequestMessage, DeliveryMode.NON_PERSISTENT, Message.DEFAULT_PRIORITY,
timeToLive);
            receiver = session.createReceiver(replyQueue);
            receiver.receive();
        } catch (Exception e) {
              ...
        } finally {
            try { receiver.close(); } catch (Exception ignored) {}
            try { sender.close(); } catch (Exception ignored) {}
            try { session.close(); } catch (Exception ignored) {}
            try { connection.close(); } catch (Exception ignored) {}            
        }
}}}


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