[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-1685) jboss messaging / memory leak on session.rollback() operation

[Howard Gao (JIRA)]

    [ https://jira.jboss.org/jira/browse/JBMESSAGING-1685?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12478012#action_12478012 ] 

Howard Gao commented on JBMESSAGING-1685:
-----------------------------------------

Hi Martin,

If I didn't understand wrong, the problem is that there is too much messages in the DLQ and this caused OOM. The DLQ is just like any other queues in JBM, which will holds messages that are sent to it. To control the memory usage of a queue, you can limit the number of messages that reside in memory by specifying fullSize/pageSize/downCacheSize attributes of the queue. Any more messages that exceed the fullSize will be stored to DB and later will be loaded as the messages are being delivered off. 

The properties are described in the JBM doc. Please try it and see if the OOM is gone.

> jboss messaging / memory leak on session.rollback() operation
> -------------------------------------------------------------
>
>                 Key: JBMESSAGING-1685
>                 URL: https://jira.jboss.org/jira/browse/JBMESSAGING-1685
>             Project: JBoss Messaging
>          Issue Type: Bug
>          Components: Messaging Core
>    Affects Versions: 1.4.3.GA
>         Environment: Windows Server 2003/SP2
>            Reporter: Martin Gysel
>            Assignee: Howard Gao
>             Fix For: 1.4.0.SP3.CP09, 1.4.5.GA
>
>         Attachments: QueueExample.java, QueueExampleLong.java, QueueExampleLong2.java, Test100K.jpg, Test10K.jpg
>
>
> we run a transacted jms application using jboss 5.1.0.GA and jboss messaging 1.4.3.GA. if a received message could not be successfully processed, e.g. because another subsystem is not available, the application issues a rollback() operation on the session. by default it is presented again 10 times until it is discarded/removed. as the jms workload is quite high sooner or later the application server ends up in out of memory conditions in heap space.
> the case can easily be reproduced with a small test application (one program sending messages, the other one receiving). the following cases/setups have been tested and ran into this memory leak
> - close session/connection after this many rollback() operations, e.g. 100
> - close session/connection after all messages have been received (and removed)
> - clustered vs. not clustered makes no difference
> - hypersonic vs. db2 makes no difference
> - adding a DLQ makes no difference
> - DeliveryMode.NON_PERSISTENT makes no difference
> the same problem can also be seen with jboss 4.2.3.GA and jboss messaging 1.4.2.GA.
> session.commit() operations (x thousands and more) do not lead to a leak
> we do not use XA.
> thanks for your help.

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