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From "omkar vinit joshi (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-99) Jobs fail during resource localization when directories in file cache reaches to unix directory limit
Date Tue, 12 Mar 2013 18:45:13 GMT

    [ https://issues.apache.org/jira/browse/YARN-99?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13600312#comment-13600312
] 

omkar vinit joshi commented on YARN-99:
---------------------------------------

I am creating a yarn-467 for public cache issue. Private cache fix will be committed here.
                
> Jobs fail during resource localization when directories in file cache reaches to unix
directory limit
> -----------------------------------------------------------------------------------------------------
>
>                 Key: YARN-99
>                 URL: https://issues.apache.org/jira/browse/YARN-99
>             Project: Hadoop YARN
>          Issue Type: Bug
>          Components: nodemanager
>    Affects Versions: 3.0.0, 2.0.0-alpha
>            Reporter: Devaraj K
>            Assignee: Devaraj K
>
> If we have multiple jobs which uses distributed cache with small size of files, the directory
limit reaches before reaching the cache size and fails to create any directories in file cache.
The jobs start failing with the below exception.
> {code:xml}
> java.io.IOException: mkdir of /tmp/nm-local-dir/usercache/root/filecache/1701886847734194975
failed
> 	at org.apache.hadoop.fs.FileSystem.primitiveMkdir(FileSystem.java:909)
> 	at org.apache.hadoop.fs.DelegateToFileSystem.mkdir(DelegateToFileSystem.java:143)
> 	at org.apache.hadoop.fs.FilterFs.mkdir(FilterFs.java:189)
> 	at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:706)
> 	at org.apache.hadoop.fs.FileContext$4.next(FileContext.java:703)
> 	at org.apache.hadoop.fs.FileContext$FSLinkResolver.resolve(FileContext.java:2325)
> 	at org.apache.hadoop.fs.FileContext.mkdir(FileContext.java:703)
> 	at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:147)
> 	at org.apache.hadoop.yarn.util.FSDownload.call(FSDownload.java:49)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
> 	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
> 	at java.util.concurrent.FutureTask.run(FutureTask.java:138)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
> 	at java.lang.Thread.run(Thread.java:662)
> {code}
> We should have a mechanism to clean the cache files if it crosses specified number of
directories like cache size.

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