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From "Arun C Murthy (JIRA)" <j...@apache.org>
Subject [jira] [Closed] (MAPREDUCE-4467) IndexCache failures due to missing synchronization
Date Thu, 11 Oct 2012 17:50:49 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Arun C Murthy closed MAPREDUCE-4467.
------------------------------------

    
> IndexCache failures due to missing synchronization
> --------------------------------------------------
>
>                 Key: MAPREDUCE-4467
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4467
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 0.23.2
>            Reporter: Andrey Klochkov
>            Assignee: Kihwal Lee
>            Priority: Critical
>             Fix For: 0.23.3, 2.0.2-alpha
>
>         Attachments: mapreduce-4467.patch.txt, mapreduce-4467.patch.txt
>
>
> TestMRJobs.testSleepJob fails randomly due to synchronization error in IndexCache:
> {code}
> 2012-07-20 19:32:34,627 ERROR [New I/O server worker #2-1] mapred.ShuffleHandler (ShuffleHandler.java:exceptionCaught(528))
- Shuffle error: 
> java.lang.IllegalMonitorStateException
> 	at java.lang.Object.wait(Native Method)
> 	at org.apache.hadoop.mapred.IndexCache.getIndexInformation(IndexCache.java:74)
> 	at org.apache.hadoop.mapred.ShuffleHandler$Shuffle.sendMapOutput(ShuffleHandler.java:471)
> 	at org.apache.hadoop.mapred.ShuffleHandler$Shuffle.messageReceived(ShuffleHandler.java:397)
> 	at org.jboss.netty.handler.stream.ChunkedWriteHandler.handleUpstream(ChunkedWriteHandler.java:148)
> 	at org.jboss.netty.handler.codec.http.HttpChunkAggregator.messageReceived(HttpChunkAggregator.java:116)
> 	at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:302)
> 	at org.jboss.netty.handler.codec.replay.ReplayingDecoder.unfoldAndfireMessageReceived(ReplayingDecoder.java:522)
> 	at org.jboss.netty.handler.codec.replay.ReplayingDecoder.callDecode(ReplayingDecoder.java:506)
> 	at org.jboss.netty.handler.codec.replay.ReplayingDecoder.messageReceived(ReplayingDecoder.java:443)
> 	at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:274)
> 	at org.jboss.netty.channel.Channels.fireMessageReceived(Channels.java:261)
> 	at org.jboss.netty.channel.socket.nio.NioWorker.read(NioWorker.java:349)
> 	at org.jboss.netty.channel.socket.nio.NioWorker.processSelectedKeys(NioWorker.java:280)
> 	at org.jboss.netty.channel.socket.nio.NioWorker.run(NioWorker.java:200)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {code}
> A related issue is MAPREDUCE-4384. The change introduced there removed "synchronized"
keyword and hence "info.wait()" call fails. Tbis needs to be wrapped into a "synchronized"
block.

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