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From "Devaraj K (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (MAPREDUCE-4137) MRAppMaster shutdown hook should not call FileSystem.closeAll()
Date Wed, 11 Apr 2012 14:43:18 GMT

     [ https://issues.apache.org/jira/browse/MAPREDUCE-4137?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Devaraj K resolved MAPREDUCE-4137.
----------------------------------

    Resolution: Duplicate
    
> MRAppMaster shutdown hook should not call FileSystem.closeAll()
> ---------------------------------------------------------------
>
>                 Key: MAPREDUCE-4137
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-4137
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: mrv2
>    Affects Versions: 2.0.0
>            Reporter: Alejandro Abdelnur
>             Fix For: 2.0.0
>
>
> Filesystem.closeAll() attempts to remove the FileSystem shutdown hook.
> This triggers an exception
> {code}
> 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$Cache.remove(FileSystem.java:2101)
> 	at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2133)
> 	at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2110)
> 	at org.apache.hadoop.fs.FileSystem.closeAll(FileSystem.java:361)
> 	at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$MRAppMasterShutdownHook.run(MRAppMaster.java:1013)
> {code}
> Besides, because the FileSystem has its own shutdown hook that does a closeAll() the
call from MRAppMaster is not needed.

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