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From "Nishanth Shajahan (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-12426) Dead Region Servers after Decommissioning
Date Tue, 04 Nov 2014 19:22:34 GMT
Nishanth Shajahan created HBASE-12426:
-----------------------------------------

             Summary: Dead Region Servers after Decommissioning 
                 Key: HBASE-12426
                 URL: https://issues.apache.org/jira/browse/HBASE-12426
             Project: HBase
          Issue Type: Bug
          Components: Balancer
    Affects Versions: 0.96.1.1
         Environment: RHEL 6.5
            Reporter: Nishanth Shajahan
            Priority: Minor


I initially had a set of  5 region servers  which had a single table  which was pre split
into 30 regions and was evenly distributed to all the regions with data.I then went ahead
and removed/decommissioned a coupe of region servers,so in the end I have 3 region servers.Ran
 hbase hbck and verified there were 0 inconsistencies.However when  'status' command is issued
is from  hbase shell it shows a dead region server and the same is displayed in master UI
as well.Fail over of hbase master did not fix the issue.On investigation we could see some
WAL entries which was still pointing to the old region server.
/hbase/WALs/myserver,60020,1406745344969-splitting

After removing these orphan entries from  hdfs and  master failover the dead region servers
went away.I wonder if this  could have  caused any replication issues in the cluster.



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