[jira] [Created] (UIMA-4263) thread safety problem in uimaj-core code causing occasional hang

["Marshall Schor (JIRA)" <de...@uima.apache.org>]

Marshall Schor created UIMA-4263:
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             Summary: 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
    Affects Versions: 2.7.0SDK
            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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