You are viewing a plain text version of this content. The canonical link for it is here.

Posted to mapreduce-dev@hadoop.apache.org by "Todd Lipcon (JIRA)" <ji...@apache.org> on 2012/06/21 19:27:42 UTC

[jira] [Created] (MAPREDUCE-4359) Potential deadlock in Counters

Todd Lipcon created MAPREDUCE-4359:
--------------------------------------

             Summary: Potential deadlock in Counters
                 Key: MAPREDUCE-4359
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4359
             Project: Hadoop Map/Reduce
          Issue Type: Bug
    Affects Versions: 1.0.3
            Reporter: Todd Lipcon


jcarder identified this deadlock in branch-1 (though it may also be present in trunk):
- Counters.size() is synchronized and locks Counters before Group
- Counters.Group.getCounterForName() is synchronized and calls through to Counters.size()

This creates a potential cycle which could cause a deadlock (though probably quite rare in practice)

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira