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Posted to issues@cloudstack.apache.org by "Kelven Yang (JIRA)" <ji...@apache.org> on 2014/05/22 01:18:39 UTC

[jira] [Commented] (CLOUDSTACK-6743) Race condition situation in MessageDetector may cause a outer tight loop to spin

    [ https://issues.apache.org/jira/browse/CLOUDSTACK-6743?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14005371#comment-14005371 ] 

Kelven Yang commented on CLOUDSTACK-6743:
-----------------------------------------

commit e3bb8b98bd9055115004da2ec67b29271a3974c5
Author: Kelven Yang <ke...@gmail.com>
Date:   Wed May 21 16:14:14 2014 -0700

    CLOUDSTACK-5485: Use edge-triggering in MessageDetector to handle bogus wakeup gracefully. Level triggering plus bogus wakeup can cause a tight loop to spin



> Race condition situation in MessageDetector may cause a outer tight loop to spin
> --------------------------------------------------------------------------------
>
>                 Key: CLOUDSTACK-6743
>                 URL: https://issues.apache.org/jira/browse/CLOUDSTACK-6743
>             Project: CloudStack
>          Issue Type: Bug
>      Security Level: Public(Anyone can view this level - this is the default.) 
>          Components: Management Server
>    Affects Versions: 4.3.0, 4.4.0
>            Reporter: Kelven Yang
>            Assignee: Kelven Yang
>            Priority: Critical
>             Fix For: 4.4.0
>
>
> MessageDetector current uses level-triggering to wait for messages from message bus, a bogus wakeup may cause outside loop to become spinning.



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