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https://issues.apache.org/jira/browse/HDFS-7884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14377650#comment-14377650
]
Hudson commented on HDFS-7884:
------------------------------
FAILURE: Integrated in Hadoop-Yarn-trunk #876 (See
[https://builds.apache.org/job/Hadoop-Yarn-trunk/876/])
HDFS-7884. Fix NullPointerException in BlockSender when the generation stamp
provided by the client is larger than the one stored in the datanode.
Contributed by Brahma Reddy Battula (szetszwo: rev
d7e3c3364eb904f55a878bc14c331952f9dadab2)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java
> NullPointerException in BlockSender
> -----------------------------------
>
> Key: HDFS-7884
> URL: https://issues.apache.org/jira/browse/HDFS-7884
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: datanode
> Reporter: Tsz Wo Nicholas Sze
> Assignee: Brahma Reddy Battula
> Priority: Blocker
> Fix For: 2.7.0
>
> Attachments: HDFS-7884-002.patch, HDFS-7884.patch,
> h7884_20150313.patch,
> org.apache.hadoop.hdfs.TestAppendSnapshotTruncate-output.txt
>
>
> {noformat}
> java.lang.NullPointerException
> at
> org.apache.hadoop.hdfs.server.datanode.BlockSender.<init>(BlockSender.java:264)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:506)
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:116)
> at
> org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:71)
> at
> org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:249)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
> BlockSender.java:264 is shown below
> {code}
> this.volumeRef = datanode.data.getVolume(block).obtainReference();
> {code}
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