[logback-dev] [JIRA] Commented: (LBCLASSIC-234) CLONE -Excessive synchronization in ReconfigureOnChangeFilter.decide

[Ceki Gulcu (JIRA)]

    [ http://jira.qos.ch/browse/LBCLASSIC-234?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12396#action_12396 ] 

Ceki Gulcu commented on LBCLASSIC-234:
--------------------------------------

I am happy to report that I am now able to reproduce this problem. Changing the root level from DEBUG to ERROR was key. As explained by Uri Unger, if logging is enabled, then I/O times dominate everything else.

A fix is on the way.



> CLONE -Excessive synchronization in ReconfigureOnChangeFilter.decide
> --------------------------------------------------------------------
>
>                 Key: LBCLASSIC-234
>                 URL: http://jira.qos.ch/browse/LBCLASSIC-234
>             Project: logback-classic
>          Issue Type: Bug
>    Affects Versions: 0.917
>            Reporter: uri unger
>            Assignee: Ceki Gulcu
>            Priority: Critical
>         Attachments: screenshot-1.jpg
>
>
> The synchronization in ReconfigureOnChangeFilter.decide hurts scalability.
> It seems unnecessary to serialize the code in changeDetected -- it should be possible to use atomic updates of nextCheck and lastModified and only serialize the actual reconfiguration.

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