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https://issues.apache.org/jira/browse/HBASE-7723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13568395#comment-13568395
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Kevin Odell commented on HBASE-7723:
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Himanshu,

  I don't think it is a big deal to manually remove the znodes once.  We should 
just get the steps in the Apache book under moving to HA and removing HA(HDFS):

1.) Make sure HBase is still shutdown
2.) go to ZK node
3.) run /usr/lib/zookeeper/bin/zkCli.sh
4.) run ls /hbase/splitlogs
5.) if there is content run rmr /hbase/splitlogs
                
> Remove NN URI from ZK splitlogs.
> --------------------------------
>
>                 Key: HBASE-7723
>                 URL: https://issues.apache.org/jira/browse/HBASE-7723
>             Project: HBase
>          Issue Type: Bug
>          Components: hadoop2, master
>    Affects Versions: 0.92.0
>            Reporter: Kevin Odell
>            Assignee: Himanshu Vashishtha
>         Attachments: HBASE-7723-94.patch
>
>
> When moving to HDFS HA or removing HA we end up changing the NN namespace.  
> This can cause the HMaster not to start up fully due to trying to split 
> phantom HLogs pointing to the wrong FS - java.lang.IllegalArgumentException: 
> Wrong FS: error messages.  The HLogs in question might not even be on HDFS 
> anymore.  You have to go in a manually clear out the ZK splitlogs directory 
> to get HBase to properly boot up.

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