Nishanth Shajahan created HBASE-12426:
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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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