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https://issues.apache.org/jira/browse/HDFS-7884?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14353029#comment-14353029
]
Vinayakumar B commented on HDFS-7884:
-------------------------------------
I think some problem with the cleaning of the jenkins workspace.
{noformat}[ERROR] Failed to execute goal
org.apache.maven.plugins:maven-clean-plugin:2.5:clean (default-clean) on
project hadoop-hdfs: Failed to clean project: Failed to delete
/home/jenkins/jenkins-slave/workspace/PreCommit-HDFS-Build/hadoop-hdfs-project/hadoop-hdfs/target/test/data/dfs/data/data3
-> [Help 1]{noformat}
> 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
> Attachments: HDFS-7884.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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