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https://issues.apache.org/activemq/browse/SM-1234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=43664#action_43664
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Trevor Pounds commented on SM-1234:
-----------------------------------
I noticed that there is a way to disable caching of message attributes when
using the Spring based jms:consumer endpoint with the "stateless" attribute set
to true.
> ServiceMix JMS MultiplexingConsumerProcessor memory bloat due to hung/delayed
> exchanges
> ---------------------------------------------------------------------------------------
>
> Key: SM-1234
> URL: https://issues.apache.org/activemq/browse/SM-1234
> Project: ServiceMix
> Issue Type: Bug
> Components: servicemix-jms
> Affects Versions: 3.2.1
> Reporter: Trevor Pounds
> Fix For: 3.3
>
>
> There is a pendingMessages data structure which holds onto JMS Message object
> references until the exchange is returned. If the asynchronous exchanges are
> hung or delayed the pendingMessages can grow quite large resulting in heap
> allocation errors if the messages are large. A heap dump on one of our data
> sets showed > 700MB of messages being referenced due to this data structure.
> As far as I can tell the JMS Message reference pulled from the map is only
> used to retrieve certain JMS Message properties (getJMSReplyTo,
> getJMSMessageID, getJMSCorrelationID).
> Possible fixes:
> 1) On InOnly exchanges do not store the Message since the method exits
> without using any of the message attributes
> 2) Store only the attributes needed for exchanges needing a reply
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