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https://issues.apache.org/jira/browse/HDFS-1782?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13022516#comment-13022516
]
Hudson commented on HDFS-1782:
------------------------------
Integrated in Hadoop-Hdfs-trunk #643 (See
[https://builds.apache.org/hudson/job/Hadoop-Hdfs-trunk/643/])
> 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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