[jira] [Created] (HBASE-10257) [0.94] Master aborts due to assignment race

["Lars Hofhansl (JIRA)" <ji...@apache.org>]

Lars Hofhansl created HBASE-10257:
-------------------------------------

             Summary: [0.94] Master aborts due to assignment race
                 Key: HBASE-10257
                 URL: https://issues.apache.org/jira/browse/HBASE-10257
             Project: HBase
          Issue Type: Sub-task
            Reporter: Lars Hofhansl
            Assignee: Lars Hofhansl
             Fix For: 0.94.16


# When a region server attempts to open a region and fails it takes the resp. znode to PENDING_OPEN followed by FAILED_OPEN in quick succession.
# The HMaster  now gets two notifications from ZK.
# If the znode transitioned to FAILED_OPEN before the HMaster could react to PENDING_OPEN. There will be two ClosedRegionHandler running.

That races causes this condition:
{code}
java.lang.IllegalStateException: Unexpected state : testRetrying,jjj,1372891751115.9b828792311001062a5ff4b1038fe33b. state=PENDING_OPEN, ts=1372891751912, server=hemera.apache.org,39064,1372891746132 .. Cannot transit it to OFFLINE.
	at org.apache.hadoop.hbase.master.AssignmentManager.setOfflineInZooKeeper(AssignmentManager.java:1879)
	at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1688)
	at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1424)
	at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1399)
	at org.apache.hadoop.hbase.master.AssignmentManager.assign(AssignmentManager.java:1394)
	at org.apache.hadoop.hbase.master.handler.ClosedRegionHandler.process(ClosedRegionHandler.java:105)
	at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:175)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
	at java.lang.Thread.run(Thread.java:662)
{code}




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