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Posted to oak-issues@jackrabbit.apache.org by "Francesco Mari (JIRA)" <ji...@apache.org> on 2017/01/26 10:01:24 UTC

[jira] [Created] (OAK-5521) CommunicationObserver and its MBeans needs proper synchronization

Francesco Mari created OAK-5521:
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             Summary: CommunicationObserver and its MBeans needs proper synchronization
                 Key: OAK-5521
                 URL: https://issues.apache.org/jira/browse/OAK-5521
             Project: Jackrabbit Oak
          Issue Type: Bug
          Components: segment-tar
            Reporter: Francesco Mari
            Assignee: Francesco Mari
             Fix For: 1.6


The {{CommunicationObserver}} used in Cold Standby might be called concurrently by multiple threads. The implementation of {{CommunicationObserver}} doesn't currently use any form of synchronization to protect its state.

Moreover, the MBeans published by the {{CommunicationObserver}} might be concurrently read via JMX and updated via the {{CommunicationObserver}}. As such, further synchronization is also needed in the MBeans to protect concurrent access to shared data.



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