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From "stack (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-5594) Unable to stop a master that's waiting on -ROOT- during initialization
Date Wed, 21 Mar 2012 20:20:38 GMT

    [ https://issues.apache.org/jira/browse/HBASE-5594?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13234978#comment-13234978
] 

stack commented on HBASE-5594:
------------------------------

Not necessary.  I want to get it into trunk though, hbase-5328 that is (which fixes this)
                
> Unable to stop a master that's waiting on -ROOT- during initialization
> ----------------------------------------------------------------------
>
>                 Key: HBASE-5594
>                 URL: https://issues.apache.org/jira/browse/HBASE-5594
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.92.1
>            Reporter: Jean-Daniel Cryans
>             Fix For: 0.92.2, 0.94.0, 0.96.0
>
>
> We just had a case where the master (that was just restarted) was having a hard time
assigning -ROOT- (all the PRI handlers were full already) so we tried to shutdown the cluster
and even though all the RS closed down properly the master kept running being blocked on:
> {noformat}
> "master-sv4r20s12,10302,1331916142866" prio=10 tid=0x00007f3708008800 nid=0x4b20 in Object.wait()
[0x00007f370d1d0000]
>    java.lang.Thread.State: WAITING (on object monitor)
> 	at java.lang.Object.wait(Native Method)
> 	- waiting on <0x00000006030be3f8> (a org.apache.hadoop.hbase.zookeeper.RootRegionTracker)
> 	at java.lang.Object.wait(Object.java:485)
> 	at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.blockUntilAvailable(ZooKeeperNodeTracker.java:131)
> 	- locked <0x00000006030be3f8> (a org.apache.hadoop.hbase.zookeeper.RootRegionTracker)
> 	at org.apache.hadoop.hbase.zookeeper.ZooKeeperNodeTracker.blockUntilAvailable(ZooKeeperNodeTracker.java:104)
> 	- locked <0x00000006030be3f8> (a org.apache.hadoop.hbase.zookeeper.RootRegionTracker)
> 	at org.apache.hadoop.hbase.catalog.CatalogTracker.waitForRoot(CatalogTracker.java:313)
> 	at org.apache.hadoop.hbase.master.HMaster.assignRootAndMeta(HMaster.java:571)
> 	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:501)
> 	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:336)
> 	at java.lang.Thread.run(Thread.java:662)
> {noformat}
> I haven't checked the 0.90 code, we got this on 0.92.1

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