[jira] Commented: (HDFS-1550) NPE when listing a file with no location

["dhruba borthakur (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HDFS-1550?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12973926#action_12973926 ] 

dhruba borthakur commented on HDFS-1550:
----------------------------------------

+1, code looks good.

> 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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