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From " (JIRA)" <>
Subject [jira] Created: (AMQ-1083) Heap overflow when durable consumer closes
Date Fri, 01 Dec 2006 03:47:02 GMT
Heap overflow when durable consumer closes

                 Key: AMQ-1083
             Project: ActiveMQ
          Issue Type: Bug
          Components: Message Store
    Affects Versions: 4.2.0

(Not sure if bug is in broker or store, but my best guess is in the store, so that is how
I have assigned the bug.  I have attempted to track down in the code where the leak is occurring,
but have not yet been successful.)

This is with the Kaha store and the store durable pending cursor.  Messages size is 10 kilobytes.
 Heap size set to 512MB.  activemq.xml configured for 100 MB. Using example producer and consumer

1. Start a consumer for a durable topic and stop it immediately. 
2. Start the producer for the durable topic (leave it running for remainder of test). 
3. Wait until 50000 messages have been enqueued. 
4. Restart the consumer from Step #1, have it consume 8000 messages. 
5. Once the consumer has ended (producer still running), heap usage will rise until out of
heap (forcing GC does not affect). 

Heap usage was about 80 MB at the time the consumer closed, and rose to > 500 MB within
one minute of the consumer closing.

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