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https://issues.apache.org/jira/browse/HADOOP-3519?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12603684#action_12603684
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Lohit Vijayarenu commented on HADOOP-3519:
------------------------------------------
When this happens, I see this stack trace on namenode
{noformat}
tion: java.lang.NullPointerException
java.io.IOException: java.lang.NullPointerException
at org.apache.hadoop.dfs.FSDirectory.updateCount(FSDirectory.java:759)
at org.apache.hadoop.dfs.FSDirectory.addChild(FSDirectory.java:886)
at org.apache.hadoop.dfs.FSDirectory.unprotectedRenameTo(FSDirectory.java:393)
at org.apache.hadoop.dfs.FSDirectory.renameTo(FSDirectory.java:328)
at org.apache.hadoop.dfs.FSNamesystem.renameToInternal(FSNamesystem.java:1420)
at org.apache.hadoop.dfs.FSNamesystem.renameTo(FSNamesystem.java:1397)
at org.apache.hadoop.dfs.NameNode.rename(NameNode.java:401)
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$Server.call(RPC.java:452)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:888)
{noformat}
> NPE in DFS FileSystem rename
> ----------------------------
>
> Key: HADOOP-3519
> URL: https://issues.apache.org/jira/browse/HADOOP-3519
> Project: Hadoop Core
> Issue Type: Bug
> Components: dfs
> Reporter: Tom White
> Priority: Blocker
> Fix For: 0.18.0
>
>
> I think this is a regression:
> {noformat}
> % bin/hadoop fs -mkdir /a/b
> % bin/hadoop fs -mv /a/b /c/d
> mv: java.io.IOException: java.lang.NullPointerException
> {noformat}
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