[HBASE-7616] NPE in ZKProcedureCoordinator$1.nodeCreated

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: hbase-7290
• Fix Version/s: 0.95.0
• Component/s: snapshots
• Hadoop Flags: Reviewed
• Assignee: Jonathan Hsieh
• Reporter: Jonathan Hsieh
• Created: 17/Jan/13 19:46
• Updated: 23/Sep/13 18:31
• Resolved: 18/Jan/13 21:26

Description

In a unit test run we saw this in an unrelated test. (testReplication)

2013-01-15 13:07:47,337 DEBUG [pool-1-thread-1-EventThread] zookeeper.ZKUtil(1611): master:32835-0x13c4009e99f0003 Retrieved 28 byte(s) of data from znode /1/shutdown and set watcher; Tue Jan 15 13:07:47 PST 2013
2013-01-15 13:07:47,339 ERROR [pool-1-thread-1-EventThread] zookeeper.ClientCnxn$EventThread(521): Error while calling watcher 
java.lang.NullPointerException
	at org.apache.hadoop.hbase.procedure.ZKProcedureCoordinatorRpcs$1.nodeCreated(ZKProcedureCoordinatorRpcs.java:168)
	at org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher.process(ZooKeeperWatcher.java:294)
	at org.apache.zookeeper.ClientCnxn$EventThread.processEvent(ClientCnxn.java:519)
	at org.apache.zookeeper.ClientCnxn$EventThread.run(ClientCnxn.java:495)

This is likely due to an initialization race.