[HBASE-3346] NPE in processRegionInTransition causing master abort

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Cannot Reproduce
• Affects Version/s: 0.90.0
• Component/s: master
• Assignee: Unassigned
• Reporter: Todd Lipcon
• Created: 13/Dec/10 20:59
• Updated: 12/Jun/22 00:37
• Resolved: 30/Oct/12 21:19

Description

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