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