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https://issues.apache.org/jira/browse/HDFS-1934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13042743#comment-13042743
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Hudson commented on HDFS-1934:
------------------------------
Integrated in Hadoop-Hdfs-trunk #685 (See
[https://builds.apache.org/hudson/job/Hadoop-Hdfs-trunk/685/])
HDFS-1934. Fix NullPointerException when certain File APIs return null.
Contributed by Bharath Mundlapudi.
mattf : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1130262
Files :
*
/hadoop/hdfs/trunk/src/java/org/apache/hadoop/hdfs/server/datanode/DirectoryScanner.java
*
/hadoop/hdfs/trunk/src/java/org/apache/hadoop/hdfs/server/datanode/FSDataset.java
* /hadoop/hdfs/trunk/CHANGES.txt
> Fix NullPointerException when File.listFiles() API returns null
> ---------------------------------------------------------------
>
> Key: HDFS-1934
> URL: https://issues.apache.org/jira/browse/HDFS-1934
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 0.23.0
> Reporter: Bharath Mundlapudi
> Assignee: Bharath Mundlapudi
> Fix For: 0.23.0
>
> Attachments: HDFS-1934-1.patch, HDFS-1934-2.patch, HDFS-1934-3.patch,
> HDFS-1934-4.patch, HDFS-1934-5.patch
>
>
> While testing Disk Fail Inplace, We encountered the NPE from this part of the
> code.
> File[] files = dir.listFiles();
> for (File f : files) {
> ...
> }
> This is kinda of an API issue. When a disk is bad (or name is not a
> directory), this API (listFiles, list) return null rather than throwing an
> exception. This 'for loop' throws a NPE exception. And same applies to
> dir.list() API.
> Fix all the places where null condition was not checked.
>
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