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https://issues.apache.org/jira/browse/UIMA-4263?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marshall Schor resolved UIMA-4263.
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Resolution: Fixed
fixed in revision 1665331
> thread safety problem in uimaj-core code causing occasional hang
> ----------------------------------------------------------------
>
> Key: UIMA-4263
> URL: https://issues.apache.org/jira/browse/UIMA-4263
> Project: UIMA
> Issue Type: Bug
> Components: Core Java Framework
> Reporter: Marshall Schor
> Assignee: Marshall Schor
> Priority: Minor
> Fix For: 2.7.1SDK
>
>
> The class AnalysisEngineManagementImpl (which implements JMX instrumentation)
> uses a static set to remember what names have been used for "root" MBeans.
> Access to this set is not synchronized, so it's possible for two threads to
> try and simultaneously update this set. Check for other static sets/maps
> with this problem, too. Either convert this to a synchronized access, or use
> one of the concurrent maps/sets.
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