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Date: Mon, 22 Aug 2011 22:24:29 +0000 (UTC)
From: "Tsz Wo (Nicholas), SZE (JIRA)" <jira@apache.org>
To: hdfs-issues@hadoop.apache.org
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Subject: [jira] [Commented] (HDFS-2065) Fix NPE in DFSClient.getFileChecksum
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    [ https://issues.apache.org/jira/browse/HDFS-2065?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13089083#comment-13089083 ] 

Tsz Wo (Nicholas), SZE commented on HDFS-2065:
----------------------------------------------

Thanks Bharath, there were some unit tests failed in [build #866|https://issues.apache.org/jira/browse/HDFS-2065?focusedCommentId=13060939&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-13060939] but the test report was no longer available.  I tried to apply the patch manually.  There was some conflict in FSNamesystem.

> Fix NPE in DFSClient.getFileChecksum
> ------------------------------------
>
>                 Key: HDFS-2065
>                 URL: https://issues.apache.org/jira/browse/HDFS-2065
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.23.0
>            Reporter: Bharath Mundlapudi
>            Assignee: Bharath Mundlapudi
>             Fix For: 0.23.0
>
>         Attachments: HDFS-2065-1.patch
>
>
> The following code can throw NPE if callGetBlockLocations returns null.
> If server returns null 
> {code}
>     List<LocatedBlock> locatedblocks
>         = callGetBlockLocations(namenode, src, 0, Long.MAX_VALUE).getLocatedBlocks();
> {code}
> The right fix for this is server should throw right exception.

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