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From "Hairong Kuang (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HDFS-1550) NPE when listing a file with no location
Date Tue, 21 Dec 2010 21:52:02 GMT

    [ https://issues.apache.org/jira/browse/HDFS-1550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973925#action_12973925
] 

Hairong Kuang commented on HDFS-1550:
-------------------------------------

     [exec] +1 overall.  
     [exec] 
     [exec]     +1 @author.  The patch does not contain any @author tags.
     [exec] 
     [exec]     +1 tests included.  The patch appears to include 3 new or modified tests.
     [exec] 
     [exec]     +1 javadoc.  The javadoc tool did not generate any warning messages.
     [exec] 
     [exec]     +1 javac.  The applied patch does not increase the total number of javac compiler
warnings.
     [exec] 
     [exec]     +1 findbugs.  The patch does not introduce any new Findbugs (version 1.3.9)
warnings.
     [exec] 
     [exec]     +1 release audit.  The applied patch does not increase the total number of
release au
     [exec] dit warnings.
     [exec] 
     [exec]     +1 system test framework.  The patch passed system test framework compile.


> NPE when listing a file with no location
> ----------------------------------------
>
>                 Key: HDFS-1550
>                 URL: https://issues.apache.org/jira/browse/HDFS-1550
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: hdfs client
>    Affects Versions: 0.22.0
>            Reporter: Hairong Kuang
>            Assignee: Hairong Kuang
>            Priority: Blocker
>             Fix For: 0.22.0
>
>         Attachments: nullLocatedBlocks.patch
>
>
> Lines listed below will caused a NullPointerException in DFSUtil.locatedBlocks2Locations
(line 208) because EMPTY_BLOCK_LOCS  will return null when calling blocks.getLocatedBlocks()
> {noformat}
>    /** a default LocatedBlocks object, its content should not be changed */
>    private final static LocatedBlocks EMPTY_BLOCK_LOCS = new LocatedBlocks();
> {noformat}

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