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https://issues.apache.org/jira/browse/HDFS-6047?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13920917#comment-13920917
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Hudson commented on HDFS-6047:
------------------------------
SUCCESS: Integrated in Hadoop-Mapreduce-trunk #1717 (See
[https://builds.apache.org/job/Hadoop-Mapreduce-trunk/1717/])
HDFS-6047 TestPread NPE inside in DFSInputStream hedgedFetchBlockByteRange
(stack) (stack:
http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1574205)
* /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/DFSInputStream.java
> TestPread NPE inside in DFSInputStream hedgedFetchBlockByteRange
> ----------------------------------------------------------------
>
> Key: HDFS-6047
> URL: https://issues.apache.org/jira/browse/HDFS-6047
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.4.0
> Reporter: stack
> Assignee: stack
> Fix For: 2.4.0
>
> Attachments: HDFS-6047.txt, HDFS-6047.txt, HDFS-6047.txt
>
>
> Our [~andrew.wang] saw this on internal test cluster running trunk:
> {code}
> java.lang.NullPointerException: null
> at
> org.apache.hadoop.hdfs.DFSInputStream.hedgedFetchBlockByteRange(DFSInputStream.java:1181)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:1296)
> at org.apache.hadoop.fs.FSInputStream.readFully(FSInputStream.java:78)
> at
> org.apache.hadoop.fs.FSDataInputStream.readFully(FSDataInputStream.java:108)
> at org.apache.hadoop.hdfs.TestPread.pReadFile(TestPread.java:151)
> at
> org.apache.hadoop.hdfs.TestPread.testMaxOutHedgedReadPool(TestPread.java:292)
> {code}
> TestPread was failing.
> The NPE comes of our presuming there always a chosenNode as we set up hedged
> reads inside in hedgedFetchBlockByteRange (chosenNode is null'd each time
> through the loop). Usually there is a chosenNode but need to allow for case
> where there is not.
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