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From Michael Dürig (JIRA) <j...@apache.org>
Subject [jira] [Updated] (OAK-5521) CommunicationObserver and its MBeans need proper synchronization
Date Mon, 16 Oct 2017 11:35:00 GMT

     [ https://issues.apache.org/jira/browse/OAK-5521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Michael Dürig updated OAK-5521:
-------------------------------
    Fix Version/s:     (was: 1.7.12)
                   1.7.11

> CommunicationObserver and its MBeans need 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: 1.8, 1.7.11
>
>
> 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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