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From "Timothy Bish (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AMQ-2716) ActiveMQConnection leaks memory by caching ActiveMQTempQueue objects
Date Sat, 02 Jul 2011 19:02:22 GMT

     [ https://issues.apache.org/jira/browse/AMQ-2716?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Timothy Bish resolved AMQ-2716.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 5.6.0
         Assignee: Timothy Bish

Patch from AMQ-2349 applied with mods cleans up temp destinations when the PooledConnection
is closed.

> ActiveMQConnection leaks memory by caching ActiveMQTempQueue objects
> --------------------------------------------------------------------
>
>                 Key: AMQ-2716
>                 URL: https://issues.apache.org/jira/browse/AMQ-2716
>             Project: ActiveMQ
>          Issue Type: Improvement
>          Components: Broker, Geronimo Integration, JMS client, Transport
>    Affects Versions: 5.3.0
>         Environment: 64bit, SuSE 11, Sun Java 1.6.0_17, Geronimo 2.2, embedded AMQ 5.3,
TCP Tranport
>            Reporter: TH L.
>            Assignee: Timothy Bish
>             Fix For: 5.6.0
>
>
> After running messaging several hours with more than 2,000,000 asynchronous send and
more than1,000,000 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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