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From "Michael Wall (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-4615) ThreadPool timeout when checking tserver stats is confusing
Date Tue, 28 Mar 2017 19:39:41 GMT
Michael Wall created ACCUMULO-4615:
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             Summary: ThreadPool timeout when checking tserver stats is confusing
                 Key: ACCUMULO-4615
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-4615
             Project: Accumulo
          Issue Type: Bug
          Components: master
    Affects Versions: 1.8.1
            Reporter: Michael Wall
            Priority: Minor


If it takes longer than the configured time to gather information from all the tablet servers,
the thread pool stops and processing continues with whatever has been collected.  Code is
https://github.com/apache/accumulo/blob/1.8/server/master/src/main/java/org/apache/accumulo/master/Master.java#L1120,
default timeout is 6s.  Does not appear to be an issue prior to 1.8.

Best case, this was really confusing.  The monitor page would have 30 tservers, then 5 tservers.
 Didn't really see any other negative effects, no migrations and no balancing appeared to
be affected.  Worse case though, I missed something and the master is making decisions based
on incomplete information.

[~dlmarion@comcast.net] please add more info if needed.



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