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From: "Jean-Daniel Cryans (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-7766) master cannot go from 94 to 96 due
 to zookeeper data
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    [ https://issues.apache.org/jira/browse/HBASE-7766?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13744263#comment-13744263 ] 

Jean-Daniel Cryans commented on HBASE-7766:
-------------------------------------------

IMO HBASE-8348 can't be considered done unless it covers that.
                
> master cannot go from 94 to 96 due to zookeeper data
> ----------------------------------------------------
>
>                 Key: HBASE-7766
>                 URL: https://issues.apache.org/jira/browse/HBASE-7766
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Sergey Shelukhin
>            Assignee: rajeshbabu
>
> After running a 94 cluster and then updating it to 96, master cannot start due to the following:
> 2013-02-04 19:59:15,494 FATAL org.apache.hadoop.hbase.master.HMaster: Unhandled exception. Starting shutdown.
> org.apache.zookeeper.KeeperException$DataInconsistencyException: KeeperErrorCode = DataInconsistency
> at org.apache.hadoop.hbase.zookeeper.ZKUtil.convert(ZKUtil.java:1705)
> at org.apache.hadoop.hbase.zookeeper.ZKTableReadOnly.getTableState(ZKTableReadOnly.java:158)
> at org.apache.hadoop.hbase.zookeeper.ZKTable.populateTableStates(ZKTable.java:82)
> at org.apache.hadoop.hbase.zookeeper.ZKTable.<init>(ZKTable.java:69)
> at org.apache.hadoop.hbase.master.AssignmentManager.<init>(AssignmentManager.java:199)
> at org.apache.hadoop.hbase.master.HMaster.initializeZKBasedSystemTrackers(HMaster.java:550)
> at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:671)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:476)
> at java.lang.Thread.run(Thread.java:662)
> Caused by: org.apache.hadoop.hbase.DeserializationException: Missing pb magic PBUF prefix
> at org.apache.hadoop.hbase.protobuf.ProtobufUtil.expectPBMagicPrefix(ProtobufUtil.java:196)
> at org.apache.hadoop.hbase.zookeeper.ZKTableReadOnly.getTableState(ZKTableReadOnly.java:148)
> ... 7 more
> It should probably nuke the data and start as with blanks.

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