[jira] [Created] (HBASE-17305) Two active HBase Masters can run at the same time under certain circumstances

["Esteban Gutierrez (JIRA)" <ji...@apache.org>]

Esteban Gutierrez created HBASE-17305:
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             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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