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From "Rob Davies (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (AMQ-1115) Memory Leak: OutOfMemoryException throws if TopicSubscriber.receive(timeout) is used to pull JMS messages
Date Sat, 29 Aug 2009 05:57:16 GMT

     [ https://issues.apache.org/activemq/browse/AMQ-1115?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Rob Davies resolved AMQ-1115.
-----------------------------

       Resolution: Fixed
    Fix Version/s:     (was: 5.4.0)
                   5.3.0
         Assignee: Rob Davies

Set a suitable pre-fetch policy for the subscriber

> Memory Leak: OutOfMemoryException throws if TopicSubscriber.receive(timeout) is used
to pull JMS messages
> ---------------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-1115
>                 URL: https://issues.apache.org/activemq/browse/AMQ-1115
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: JMS client
>    Affects Versions: 4.1.0
>         Environment: Windows XP Professional, JDK 1.5
>            Reporter: Sam Zhou
>            Assignee: Rob Davies
>             Fix For: 5.3.0
>
>         Attachments: ActiveMq Tester.zip
>
>
> Attached sources can generate OutOfMemoryException when ActiveMQ pulls messages by using
TopicSubscriber.receive(timeout), on the other hand, if I use callback TopicSubscriber.onMessage(),
all the messages are received without any problem. Please see README.TXT for detail usage
of the program.
> Assume I set prefetch=50, publisherCount=10, subscriberCount=10, each publisher publishs
500 messages, and each message size is 100kb,
> If I use callback (option -msgcallback given in command line), e.g., TopicSubscriber.onMessage(),
all 50,000 messages are received without error. 
> if I don't use callback (option -msgcallback not given in command line), e.g., TopicSubscriber.receive(timeout),
after receiving about a thousand of messages, OutOfMemory error occurs, and the program starts
to throw Exception.

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