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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3683) Scanner retry time does not back off or include jitter
Date Wed, 18 Mar 2015 21:08:40 GMT
Eric Newton created ACCUMULO-3683:
-------------------------------------

             Summary: Scanner retry time does not back off or include jitter
                 Key: ACCUMULO-3683
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3683
             Project: Accumulo
          Issue Type: Improvement
          Components: client
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.7.0


When a tablet server goes down, scans will begin failing. The {{ThriftScanner}} has a hardcoded
100ms pause between retries.

There are two things that would improve this: an exponential back-off, and some jitter, so
the tservers aren't hammering the metadata table with requests for the new location at the
same time the master is trying to re-assign the tablets.




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