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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Updated: (HBASE-1228) Hang after crash
Date Sat, 07 Mar 2009 00:30:56 GMT

     [ https://issues.apache.org/jira/browse/HBASE-1228?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

stack updated HBASE-1228:
-------------------------

    Fix Version/s:     (was: 0.19.1)
                   0.19.2

Moving out (I think Ben said it OK).

> Hang after crash
> ----------------
>
>                 Key: HBASE-1228
>                 URL: https://issues.apache.org/jira/browse/HBASE-1228
>             Project: Hadoop HBase
>          Issue Type: Bug
>    Affects Versions: 0.19.0
>            Reporter: Ben Maurer
>             Fix For: 0.19.2
>
>
> After an exception that forced an HRegionServer to shut down, I'm seeing it hang in the
following method for at least a few minutes:
> "regionserver/0:0:0:0:0:0:0:0:60020" prio=10 tid=0x00002aaaf41a9000 nid=0x10f6 in Object.wait()
[0x00000000422dd000..0x00000000422ddb10]
>    java.lang.Thread.State: WAITING (on object monitor)
> 	at java.lang.Object.wait(Native Method)
> 	at java.lang.Object.wait(Object.java:485)
> 	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.flushInternal(DFSClient.java:3025)
> 	- locked <0x00002aaad8fa2410> (a java.util.LinkedList)
> 	- locked <0x00002aaad8fa2078> (a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream)
> 	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.closeInternal(DFSClient.java:3105)
> 	- locked <0x00002aaad8fa2078> (a org.apache.hadoop.hdfs.DFSClient$DFSOutputStream)
> 	at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.close(DFSClient.java:3054)
> 	at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:61)
> 	at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:86)
> 	at org.apache.hadoop.io.SequenceFile$Writer.close(SequenceFile.java:959)
> 	- locked <0x00002aaad8fa1f10> (a org.apache.hadoop.io.SequenceFile$Writer)
> 	at org.apache.hadoop.hbase.regionserver.HLog.close(HLog.java:431)
> 	- locked <0x00002aaab378b290> (a java.lang.Integer)
> 	at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:498)
> 	at java.lang.Thread.run(Thread.java:619)
> I believe the file system may have been closed and thus there is trouble flushing the
HLog. The HLog should be pro actively closed before shutdown begins, to maximize the chances
of it surviving the crash.

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