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From "Nick Dimiduk (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12467) Master joins cluster but never completes initialization
Date Wed, 12 Nov 2014 22:39:33 GMT
Nick Dimiduk created HBASE-12467:
------------------------------------

             Summary: Master joins cluster but never completes initialization
                 Key: HBASE-12467
                 URL: https://issues.apache.org/jira/browse/HBASE-12467
             Project: HBase
          Issue Type: Bug
          Components: master
            Reporter: Nick Dimiduk
            Assignee: Nick Dimiduk
             Fix For: 2.0.0, 0.98.9, 0.99.2


While diagnosing a rare failure in IntegrationTestLoadAndVerify, I discovered this scenario.
Master was restarted by CM. Upon rejoining the cluster it successfully assumes responsibility
as active master, but apparently the finishInitialization method never completes. The last
log line from that thread is

{noformat}
2014-11-10 17:01:29,940 INFO  [master:ip-172-31-9-135:60000] master.HMaster: hbase:meta with
replicaId 0 assigned=0, rit=false, location=ip-172-31-9-136.ec2.internal,60020,1415638551951
{noformat}

I see region states populated from existing znodes. AM inventoried the online regions, acknowledged
that this was master failover. There it sits, responding to RPC's with {{PleaseHoldException:
Master is initializing}}.

For the sake of resiliency, we should detect this scenario and at least release control as
active master.



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