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From "stack (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-5003) If the master is started with a wrong root dir, it gets stuck and can't be killed
Date Sat, 10 Dec 2011 06:15:44 GMT

     [ https://issues.apache.org/jira/browse/HBASE-5003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-5003:
-------------------------

    Labels: noob  (was: )
    
> If the master is started with a wrong root dir, it gets stuck and can't be killed
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-5003
>                 URL: https://issues.apache.org/jira/browse/HBASE-5003
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.90.4
>            Reporter: Jean-Daniel Cryans
>            Priority: Critical
>              Labels: noob
>             Fix For: 0.94.0, 0.92.1, 0.90.6
>
>
> Reported by a new user on IRC who tried to set hbase.rootdir to file:///~/hbase, the
master gets stuck and cannot be killed. I tried something similar on my machine and it spins
while logging:
> {quote}
> 2011-12-09 16:11:17,002 WARN org.apache.hadoop.hbase.util.FSUtils: Unable to create version
file at file:/bin/hbase, retrying: Mkdirs failed to create file:/bin/hbase
> 2011-12-09 16:11:27,002 WARN org.apache.hadoop.hbase.util.FSUtils: Unable to create version
file at file:/bin/hbase, retrying: Mkdirs failed to create file:/bin/hbase
> 2011-12-09 16:11:37,003 WARN org.apache.hadoop.hbase.util.FSUtils: Unable to create version
file at file:/bin/hbase, retrying: Mkdirs failed to create file:/bin/hbase
> {quote}
> The reason it cannot be stopped is that the master's main thread is stuck in there and
will never be notified:
> {quote}
> "Master:0;su-jdcryans-01.local,51116,1323475535684" prio=5 tid=7f92b7a3c000 nid=0x1137ba000
waiting on condition [1137b9000]
>    java.lang.Thread.State: TIMED_WAITING (sleeping)
> 	at java.lang.Thread.sleep(Native Method)
> 	at org.apache.hadoop.hbase.util.FSUtils.setVersion(FSUtils.java:297)
> 	at org.apache.hadoop.hbase.util.FSUtils.setVersion(FSUtils.java:268)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.checkRootDir(MasterFileSystem.java:339)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.createInitialFileSystemLayout(MasterFileSystem.java:128)
> 	at org.apache.hadoop.hbase.master.MasterFileSystem.<init>(MasterFileSystem.java:113)
> 	at org.apache.hadoop.hbase.master.HMaster.finishInitialization(HMaster.java:435)
> 	at org.apache.hadoop.hbase.master.HMaster.run(HMaster.java:314)
> 	at org.apache.hadoop.hbase.master.HMasterCommandLine$LocalHMaster.run(HMasterCommandLine.java:218)
> 	at java.lang.Thread.run(Thread.java:680)
> {quote}
> It seems we should do a better handling of the exceptions we get in there, and die if
we need to. It would make a better user experience.
> Maybe also do a check on hbase.rootdir before even starting the master.

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