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Posted to dev@oozie.apache.org by "Robert Kanter (JIRA)" <ji...@apache.org> on 2014/07/03 21:08:33 UTC

[jira] [Created] (OOZIE-1916) Use Curator leader latch instead of checking the order of Oozie servers

Robert Kanter created OOZIE-1916:
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             Summary: Use Curator leader latch instead of checking the order of Oozie servers
                 Key: OOZIE-1916
                 URL: https://issues.apache.org/jira/browse/OOZIE-1916
             Project: Oozie
          Issue Type: Improvement
          Components: HA
    Affects Versions: trunk
            Reporter: Robert Kanter
            Priority: Minor


We currently have a few tasks (e.g. Purging old jobs) that we only want to do in one Oozie server.  We currently simply check which Oozie server is first in ZooKeeper's list of servers (i.e. the order they connected).  We haven't seen any problems with this, but it might be a good idea to replace this with Curator's leader-latch, which sounds more robust.  

Once this is done, we also no longer need the internal leader-latch used by the ChildReaper in OOZIE-1906.


http://curator.apache.org/curator-recipes/leader-latch.html



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