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https://issues.apache.org/jira/browse/HBASE-3346?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13081298#comment-13081298
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Alex Newman commented on HBASE-3346:
------------------------------------
Is this possible to replicate?
> NPE in processRegionInTransition causing master abort
> -----------------------------------------------------
>
> Key: HBASE-3346
> URL: https://issues.apache.org/jira/browse/HBASE-3346
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.90.0
> Reporter: Todd Lipcon
> Priority: Blocker
>
> After the abort in HBASE-3345, I restarted the master, and it crashed again
> during startup
> 2010-12-13 12:57:00,367 DEBUG
> org.apache.hadoop.hbase.master.handler.ClosedRegionHandler: Handling CLOSED
> event for c5005ca650c7e3bdbab4c8d3e9b7c618
> 2010-12-13 12:57:00,367 DEBUG
> org.apache.hadoop.hbase.master.AssignmentManager: Table being disabled so
> deleting ZK node and removing from regions in transition, skipping assignment
> of region usertable
> 2010-12-13 12:57:00,367 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> master:60000-0x12c780205200116 Deleting existing unassigned node for
> c5005ca650c7e3bdbab4c8d3e9b7c618 that is in expected state
> 2010-12-13 12:57:00,367 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
> master:60000-0x12c780205200116 Retrieved 127 byte(s) of data from znode
> /hbase/unassigned/c5005ca650c7e3bdbab4c8d3e9b7c618; data=
> 2010-12-13 12:57:00,373 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher:
> master:60000-0x12c780205200116 Received ZooKeeper Event, type=NodeDeleted,
> state=SyncConnected, path=/hbase/unassigned/
> 2010-12-13 12:57:00,374 DEBUG
> org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher:
> master:60000-0x12c780205200116 Received ZooKeeper Event,
> type=NodeChildrenChanged, state=SyncConnected, path=/hbase/una
> 2010-12-13 12:57:00,374 DEBUG org.apache.hadoop.hbase.zookeeper.ZKAssign:
> master:60000-0x12c780205200116 Successfully deleted unassigned node for
> region c5005ca650c7e3bdbab4c8d3e9b7c618 in expected sta
> 2010-12-13 12:57:00,374 DEBUG org.apache.hadoop.hbase.zookeeper.ZKUtil:
> master:60000-0x12c780205200116 Retrieved 114 byte(s) of data from znode
> /hbase/unassigned/3dc9df76f111271c150c853716ce1f07 and se
> 2010-12-13 12:57:00,376 FATAL org.apache.hadoop.hbase.master.HMaster:
> Unhandled exception. Starting shutdown.
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.master.AssignmentManager.processRegionInTransition(AssignmentManager.java:263)
> at
> org.apache.hadoop.hbase.master.AssignmentManager.processFailover(AssignmentManager.java:222)
> at
> org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:392)
> at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:274)
> 2010-12-13 12:57:00,377 INFO org.apache.hadoop.hbase.master.HMaster: Aborting
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