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https://issues.apache.org/activemq/browse/AMQ-1254?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_39235
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David Jencks commented on AMQ-1254:
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Apparently there's a similar problem with a property called
org.apache.activeio.journal.active.lockMap
> Kaha Store puts a non-string into System properties
> ---------------------------------------------------
>
> Key: AMQ-1254
> URL: https://issues.apache.org/activemq/browse/AMQ-1254
> Project: ActiveMQ
> Issue Type: Bug
> Affects Versions: 4.1.2
> Reporter: David Jencks
> Attachments: Kaha-Store.patch
>
>
> KahaStore puts a hashmap into SystemProperties, which causes problems with
> programs that expect only strings as properties. In particular some versions
> of Hibernate assume all system properties are strings: this is causing
> difficulties running roller in geronimo 2.0
> Attached is a proposed solution. I have no idea how to test it. I get the
> same 7 failures and one error building amq with and without the change.
> The proposal stores the list of locked directories in a string and converts
> it back and forth to a map whenever it is accessed. I use a constant string
> as the vm-wide lock monitor formerly provided by the HashSet. According to
> the String javadoc constant strings are intern()ed and the same instance is
> provided in any classloader: this makes it suitable for a vm-wide lock
> monitor.
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