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https://issues.apache.org/jira/browse/HDFS-5856?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13887752#comment-13887752
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Hudson commented on HDFS-5856:
------------------------------
SUCCESS: Integrated in Hadoop-Hdfs-trunk #1659 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk/1659/])
HDFS-5856. DataNode.checkDiskError might throw NPE. Contributed by Josh Elser.
(suresh:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1563064)
* /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
*
/hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDiskError.java
> DataNode.checkDiskError might throw NPE
> ---------------------------------------
>
> Key: HDFS-5856
> URL: https://issues.apache.org/jira/browse/HDFS-5856
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Affects Versions: 2.2.0
> Reporter: Josh Elser
> Assignee: Josh Elser
> Priority: Minor
> Fix For: 2.4.0
>
> Attachments: HDFS-5856.diff, HDFS-5856.diff
>
>
> Running a small 2.2.0 cluster with a heavy workload. I noticed in the
> DataNode log that when faced with network exceptions, I would sometimes get a
> NullPointerException from checkDiskError.
> Looking at the code, if the Exception that is handed to checkDiskError
> contains a null message, the checks that try to identify if the Exception is
> network-related will throw a NPE.
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