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From "Tsz Wo (Nicholas), SZE (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HDFS-1782) FSNamesystem.startFileInternal(..) throws NullPointerException
Date Wed, 30 Mar 2011 22:39:05 GMT

     [ https://issues.apache.org/jira/browse/HDFS-1782?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Tsz Wo (Nicholas), SZE updated HDFS-1782:
-----------------------------------------

    Resolution: Fixed
        Status: Resolved  (was: Patch Available)

I have committed this.  Thanks, John!

> FSNamesystem.startFileInternal(..) throws NullPointerException
> --------------------------------------------------------------
>
>                 Key: HDFS-1782
>                 URL: https://issues.apache.org/jira/browse/HDFS-1782
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: name-node
>    Affects Versions: 0.22.0
>            Reporter: John George
>            Assignee: John George
>             Fix For: 0.22.0, 0.23.0
>
>         Attachments: HDFS-1782.patch
>
>
> I'm observing when there is one balancer running trying to run another one results in
> "Java.lang.NullPointerException" error. I was hoping to see message "Another balancer
is running. 
> Exiting....  Exiting ...". This is a reproducible issue.
> Details
> ========
> 1) Cluster ->elrond
> [hdfs@]$ hadoop version
> 2) Run first balancer
> [hdfs]$ hdfs balancer
> 1
> through XX.XX.XX.XX:1004 is succeeded.
> [hdfs@]$ hdfs balancer
> 11/03/09 16:34:32 INFO balancer.Balancer: namenodes = 
> java.io.IOException: java.lang.NullPointerException
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFileInternal(FSNamesystem.java:1400)
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.startFile(FSNamesystem.java:1284)
>         at org.apache.hadoop.hdfs.server.namenode.NameNode.create(NameNode.java:779)
>         at sun.reflect.GeneratedMethodAccessor46.invoke(Unknown Source)
>         at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>         at java.lang.reflect.Method.invoke(Method.java:597)
>         at org.apache.hadoop.ipc.WritableRpcEngine$Server.call(WritableRpcEngine.java:346)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1399)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1395)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:396)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1094)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1393)
> .  Exiting ...
> Balancing took 1.366 seconds		

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