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From "Eric Newton (JIRA)" <j...@apache.org>
Subject [jira] [Created] (ACCUMULO-3084) Delays between calls to logGC causes tserver to fail
Date Tue, 26 Aug 2014 17:41:58 GMT
Eric Newton created ACCUMULO-3084:
-------------------------------------

             Summary: Delays between calls to logGC causes tserver to fail
                 Key: ACCUMULO-3084
                 URL: https://issues.apache.org/jira/browse/ACCUMULO-3084
             Project: Accumulo
          Issue Type: Bug
          Components: tserver
    Affects Versions: 1.6.0, 1.5.1, 1.5.0
            Reporter: Eric Newton
            Assignee: Eric Newton
             Fix For: 1.5.2, 1.6.1


A complex iterator initialization took a long time (hours).

The SimpleTimer cleanup was blocked on the tablet lock.

After the scan was stopped and the SimpleTimer ran the logGCInfo saw a large jump in GC time.
 In this case it was 60s over the course of 2 hours between checks.

The tabletserver determined that GC was causing unacceptable delays and killed itself.

The check should take into account the time difference between checks, and probably log a
warning if the time difference is much larger than expected.




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