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https://issues.apache.org/jira/browse/HBASE-5279?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13193393#comment-13193393
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Tobias Herbert commented on HBASE-5279:
---------------------------------------
unfortunately I have no scan from .META. from before the upgrade.
but with this patch I am up now :-)
> NPE in Master after upgrading to 0.92.0
> ---------------------------------------
>
> Key: HBASE-5279
> URL: https://issues.apache.org/jira/browse/HBASE-5279
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.92.0
> Reporter: Tobias Herbert
> Priority: Critical
> Attachments: HBASE-5279.patch
>
>
> I have upgraded my environment from 0.90.4 to 0.92.0
> after the table migration I get the following error in the master (permanent)
> {noformat}
> 2012-01-25 18:23:48,648 FATAL master-namenode,60000,1327512209588
> org.apache.hadoop.hbase.master.HMaster - Unhandled exception. Starting
> shutdown.
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.AssignmentManager.rebuildUserRegions(AssignmentManager.java:2190)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.joinCluster(AssignmentManager.java:323)
> at
> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:501)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:326)
> at java.lang.Thread.run(Thread.java:662)
> 2012-01-25 18:23:48,650 INFO namenode,60000,1327512209588
> org.apache.hadoop.hbase.master.HMaster - Aborting
> {noformat}
> I think that's because I had a hard crash in the cluster a while ago - and
> the following WARN since then
> {noformat}
> 2012-01-25 21:20:47,121 WARN namenode,60000,1327513078123-CatalogJanitor
> org.apache.hadoop.hbase.master.CatalogJanitor - REGIONINFO_QUALIFIER is empty
> in keyvalues={emails,,xxx./info:server/1314336400471/Put/vlen=38,
> emails,,1314189353300.xxx./info:serverstartcode/1314336400471/Put/vlen=8}
> {noformat}
> my patch was simple to go around the NPE (as the other code around the lines)
> but I don't know if that's correct
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