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https://issues.apache.org/activemq/browse/AMQ-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Rob Davies reassigned AMQ-1663:
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Assignee: Rob Davies
> Problem in Kaha persistence with file name lengths and collisions during
> persistence
> ------------------------------------------------------------------------------------
>
> Key: AMQ-1663
> URL: https://issues.apache.org/activemq/browse/AMQ-1663
> Project: ActiveMQ
> Issue Type: Bug
> Components: Broker
> Affects Versions: 5.1.0
> Environment: Solaris 10, JDK 1.6
> Reporter: Kevin Yaussy
> Assignee: Rob Davies
> Priority: Blocker
>
> The management of file names within Kaha persistence is such that it may
> create a file with a name that ends up colliding with a file meant for a
> different, but very close, topic name. The file names are ultimately managed
> by org/apache/activemq/util/IOHelper.java, which will trim the file name down
> to a maximum file name size, default of 64. With sufficiently large topic
> names, it is possible to create a collision with this scheme. Ours is large
> enough, that even if I push the max to 200 (attempting to stay under the 256
> max length in Solaris), I can still get a collision.
> What this results in is modifications to a file for two different items
> and/or consumers, which causes corruption and errors.
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