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https://issues.apache.org/jira/browse/HDFS-2023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042531#comment-13042531
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Matt Foley commented on HDFS-2023:
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Eli, I asked Bharath to make a separate Jira, because this set of changes isn't 
the same content as the previously existing Jiras.  Granted he could split this 
into the same four chunks as represented by HADOOP-7342, HADOOP-7322, 
HDFS-1934, and HDFS-2019.  But it seemed more efficient to do them together for 
v20, since there is no HADOOP/HDFS split.

Do you prefer to have four patches instead of one?

> Backport of NPE for File.list and File.listFiles
> ------------------------------------------------
>
>                 Key: HDFS-2023
>                 URL: https://issues.apache.org/jira/browse/HDFS-2023
>             Project: Hadoop HDFS
>          Issue Type: Bug
>          Components: data-node
>    Affects Versions: 0.20.205.0
>            Reporter: Bharath Mundlapudi
>            Assignee: Bharath Mundlapudi
>             Fix For: 0.20.205.0
>
>         Attachments: HDFS-2023-1.patch
>
>
> Since we have multiple Jira's in trunk for common and hdfs, I am creating 
> another jira for this issue. 
> This patch addresses the following:
> 1. Provides FileUtil API for list and listFiles which throws IOException for 
> null cases. 
> 2. Replaces most of the code where JDK file API with FileUtil API. 

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