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Date: Fri, 9 Oct 2009 14:42:31 -0700 (PDT)
From: "Suresh Srinivas (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
Subject: [jira] Commented: (HDFS-676) NPE in
 FSDataset.updateReplicaUnderRecovery(..)
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    [ https://issues.apache.org/jira/browse/HDFS-676?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12764214#action_12764214 ] 

Suresh Srinivas commented on HDFS-676:
--------------------------------------

After discussing with Konstantin, I understand that the problem is fixed by changes in FSDataSet.updateReplicaUnderRecovery(). +1 for the patch.

> NPE in FSDataset.updateReplicaUnderRecovery(..)
> -----------------------------------------------
>
>                 Key: HDFS-676
>                 URL: https://issues.apache.org/jira/browse/HDFS-676
>             Project: Hadoop HDFS
>          Issue Type: Sub-task
>          Components: data-node
>    Affects Versions: 0.21.0
>            Reporter: Tsz Wo (Nicholas), SZE
>            Assignee: Konstantin Shvachko
>             Fix For: 0.21.0
>
>         Attachments: h676_20091005.patch, updateRUR.patch
>
>
> {noformat}
> java.io.IOException: java.lang.NullPointerException
> 	at org.apache.hadoop.hdfs.server.datanode.FSDataset.updateReplicaUnderRecovery(FSDataset.java:2089)
> 	at org.apache.hadoop.hdfs.server.datanode.DataNode.updateReplicaUnderRecovery(DataNode.java:1598)
> 	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:516)
> 	...
> {noformat}
> The problem can be reproduced by calling updateReplicaUnderRecovery(blockid) with blockid not in the volumeMap.

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