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Posted to dev@hbase.apache.org by "Karthik Palanisamy (Jira)" <ji...@apache.org> on 2019/11/25 04:00:14 UTC

[jira] [Created] (HBASE-23338) Prevent NPE running rsgroup balancer

Karthik Palanisamy created HBASE-23338:
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             Summary: Prevent NPE running rsgroup balancer
                 Key: HBASE-23338
                 URL: https://issues.apache.org/jira/browse/HBASE-23338
             Project: HBase
          Issue Type: Bug
          Components: rsgroup
    Affects Versions: 3.0.0
            Reporter: Karthik Palanisamy
            Assignee: Karthik Palanisamy


I think we should prevent NPE even if user trigger balancer on rsgroup that contains only a single regionserver.  Sometimes users trigger balancer on all groups even without knowing group info.
{code:java}
2019-11-24
22:50:29,868 ERROR [RpcServer.default.FPBQ.Fifo.handler=22,queue=1,port=16000]
ipc.RpcServer: Unexpected throwable object
java.lang.NullPointerException
{code}
{code:java}
hbase(main):002:0> balance_rsgroup 'shva'
ERROR: java.io.IOException at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:433) at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:133) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:338) at org.apache.hadoop.hbase.ipc.RpcExecutor$Handler.run(RpcExecutor.java:318)Caused by: java.lang.NullPointerException
For usage try 'help "balance_rsgroup"'{code}



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