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From "Nigel Daley (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HADOOP-5389) NullPointerException in fairshare PoolManager
Date Wed, 04 Mar 2009 15:09:56 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-5389?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12678755#action_12678755
] 

Nigel Daley commented on HADOOP-5389:
-------------------------------------

Although it's hard to assure there were no other side effects, I was able to submit jobs.

> NullPointerException in fairshare PoolManager
> ---------------------------------------------
>
>                 Key: HADOOP-5389
>                 URL: https://issues.apache.org/jira/browse/HADOOP-5389
>             Project: Hadoop Core
>          Issue Type: Bug
>          Components: contrib/fair-share
>    Affects Versions: 0.20.0
>            Reporter: Nigel Daley
>            Assignee: Vinod K V
>
> Found this NPE in a Hadoop 0.20.0 JobTracker log:
> {code}
> 2009-03-03 23:55:22,824 ERROR org.apache.hadoop.mapred.PoolManager: Failed to reload
allocations file - will use existing allocations.
> java.lang.NullPointerException
>         at java.io.File.<init>(File.java:222)
>         at org.apache.hadoop.mapred.PoolManager.reloadAllocsIfNecessary(PoolManager.java:119)
>         at org.apache.hadoop.mapred.FairScheduler.assignTasks(FairScheduler.java:226)
>         at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:2340)
>         at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>         at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)
> {code}

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