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Posted to dev@qpid.apache.org by "Alan Conway (JIRA)" <ji...@apache.org> on 2012/07/23 17:31:35 UTC

[jira] [Created] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Alan Conway created QPID-4163:
---------------------------------

             Summary: Deadlock between LinkRegistry and TimerTask locks
                 Key: QPID-4163
                 URL: https://issues.apache.org/jira/browse/QPID-4163
             Project: Qpid
          Issue Type: Bug
          Components: C++ Broker
    Affects Versions: 0.17
            Reporter: Alan Conway
            Assignee: Alan Conway
             Fix For: 0.18


Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Resolved] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Alan Conway (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Conway resolved QPID-4163.
-------------------------------

    Resolution: Fixed

Comitted to 0.18 branch r1365045
                
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Commented] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Alan Conway (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420742#comment-13420742 ] 

Alan Conway commented on QPID-4163:
-----------------------------------

Code review of fix:  https://reviews.apache.org/r/6093/
Request merge to 0.18 
                
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Commented] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Alan Conway (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420977#comment-13420977 ] 

Alan Conway commented on QPID-4163:
-----------------------------------

Comitted to trunk r1364805

                
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Commented] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Justin Ross (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420769#comment-13420769 ] 

Justin Ross commented on QPID-4163:
-----------------------------------

Reviewed by Gordon and Andrew.  Approved for 0.18.
                
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Comment Edited] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Alan Conway (JIRA)" <ji...@apache.org>.
    [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13420742#comment-13420742 ] 

Alan Conway edited comment on QPID-4163 at 7/23/12 4:16 PM:
------------------------------------------------------------

Code review of fix:  https://reviews.apache.org/r/6092
Request merge to 0.18 
                
      was (Author: aconway):
    Code review of fix:  https://reviews.apache.org/r/6093/
Request merge to 0.18 
                  
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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[jira] [Updated] (QPID-4163) Deadlock between LinkRegistry and TimerTask locks

Posted by "Alan Conway (JIRA)" <ji...@apache.org>.
     [ https://issues.apache.org/jira/browse/QPID-4163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Alan Conway updated QPID-4163:
------------------------------

    Attachment: ha-timer-hang.pstack

Stack trace of hung broker
                
> Deadlock between LinkRegistry and TimerTask locks
> -------------------------------------------------
>
>                 Key: QPID-4163
>                 URL: https://issues.apache.org/jira/browse/QPID-4163
>             Project: Qpid
>          Issue Type: Bug
>          Components: C++ Broker
>    Affects Versions: 0.17
>            Reporter: Alan Conway
>            Assignee: Alan Conway
>             Fix For: 0.18
>
>         Attachments: ha-timer-hang.pstack
>
>
> Very occasionally (about 2% of runs), when running ha_tests.py in a long loop one of the brokers deadlocks with the attached stack trace. The problem is a call to TimerTask::cancel with the LinkRegsitry lock held, while another thread is in TimerTask::fire and waiting for the LinkRegistry lock.

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