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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (HBASE-1228) Hang on DFSOS#flushInternal for minutes after regionserver crash
Date Tue, 07 Dec 2010 20:57:09 GMT

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

stack resolved HBASE-1228.
--------------------------

    Resolution: Invalid

Resolving as stale/invalid.  Alot has changed since.  Lets open new issue if we see this again.

> Hang on DFSOS#flushInternal for minutes after regionserver crash
> ----------------------------------------------------------------
>
>                 Key: HBASE-1228
>                 URL: https://issues.apache.org/jira/browse/HBASE-1228
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.19.0
>            Reporter: Ben Maurer
>
> 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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