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From "Esteban Gutierrez (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-17305) Two active HBase Masters can run at the same time under certain circumstances
Date Tue, 13 Dec 2016 18:40:59 GMT
Esteban Gutierrez created HBASE-17305:
-----------------------------------------

             Summary: Two active HBase Masters can run at the same time under certain circumstances

                 Key: HBASE-17305
                 URL: https://issues.apache.org/jira/browse/HBASE-17305
             Project: HBase
          Issue Type: Bug
          Components: master
    Affects Versions: 2.0.0
            Reporter: Esteban Gutierrez
            Assignee: Esteban Gutierrez
            Priority: Critical


This needs a little more investigation, but we found a very edgy case when the active master
is restarted and a stand-by master tries to become active, however the original active master
was able to become the active master again and just before the standby master passed the point
of the transition to become active we ended up with two active masters running at the same
time. Assuming the clock on both masters were accurate to milliseconds, this race happened
in less than 85ms. 



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