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https://issues.apache.org/jira/browse/AMQ-5942?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben O'Day updated AMQ-5942:
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Attachment: MessageGroupFactoryRouteTest.java
> CachedMessageGroupMapFactory fails with large key sets
> ------------------------------------------------------
>
> Key: AMQ-5942
> URL: https://issues.apache.org/jira/browse/AMQ-5942
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 5.11.1
> Reporter: Ben O'Day
> Attachments: MessageGroupFactoryRouteTest.java
>
>
> the current default factory is the CachedMessageGroupMapFactory which uses an
> LRUMap with a maxSize of 1024 keys. If you use this with more than 1024 keys
> and fail to explicitly increase the maxSize, then the message groups fails to
> ensure ordering by group, same thread processing by group and overlapping
> execution.
> I have reproduced this behavior in the attached unit test...if you switch to
> the SimpleMessageGroupMapFactory or increase the max size of the cache above
> the number of keys...the issues go away
> two suggestions
> -throw an error when the maxSize is exceeded if using the
> CachedMessageGroupMapFactory
> -make the SimpleMessageGroupMapFactory the default (unlimited)
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