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From "Steve Loughran (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (MAPREDUCE-4135) MRAppMaster throws IllegalStateException while shutting down
Date Wed, 11 Apr 2012 09:50:24 GMT

    [ https://issues.apache.org/jira/browse/MAPREDUCE-4135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13251441#comment-13251441
] 

Steve Loughran commented on MAPREDUCE-4135:
-------------------------------------------

The problem is that the FS shutdown process is being triggered by the app master shutdown
hook -at which point it is too late to remove other shutdown hooks.

{{FileSystem.Cache.remove()}} should just catch any {{IllegalStateException}} and not worry
so much about shutdown hook state failures as the system is usually in an odd state at this
point.
                
> MRAppMaster throws IllegalStateException while shutting down
> ------------------------------------------------------------
>
>                 Key: MAPREDUCE-4135
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4135
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 3.0.0
>            Reporter: Devaraj K
>
> Always MRAppMaster throws IllegalStateException in the stderr while shutting down. It
doesn't look good having this exception in the stderr file of MRAppMaster container.
> {code:xml}
> WARNING: org.apache.hadoop.metrics.jvm.EventCounter is deprecated. Please use org.apache.hadoop.log.metrics.EventCounter
in all the log4j.properties files.
> Exception in thread "Thread-1" java.lang.IllegalStateException: Shutdown in progress
> 	at java.lang.ApplicationShutdownHooks.remove(ApplicationShutdownHooks.java:55)
> 	at java.lang.Runtime.removeShutdownHook(Runtime.java:220)
> 	at org.apache.hadoop.fs.FileSystem$Cache.remove(FileSystem.java:2148)
> 	at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2180)
> 	at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2157)
> 	at org.apache.hadoop.fs.FileSystem.closeAll(FileSystem.java:361)
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$MRAppMasterShutdownHook.run(MRAppMaster.java:1014)
> {code}

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