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https://issues.apache.org/jira/browse/HDFS-7533?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14275256#comment-14275256
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Hudson commented on HDFS-7533:
------------------------------
FAILURE: Integrated in Hadoop-Hdfs-trunk-Java8 #69 (See
[https://builds.apache.org/job/Hadoop-Hdfs-trunk-Java8/69/])
HDFS-7533. Datanode sometimes does not shutdown on receiving upgrade shutdown
command. Contributed by Eric Payne. (kihwal: rev
6bbf9fdd041d2413dd78e2bce51abae15f3334c2)
* hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
*
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeExit.java
*
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java
> Datanode sometimes does not shutdown on receiving upgrade shutdown command
> --------------------------------------------------------------------------
>
> Key: HDFS-7533
> URL: https://issues.apache.org/jira/browse/HDFS-7533
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Kihwal Lee
> Assignee: Eric Payne
> Fix For: 2.7.0
>
> Attachments: HDFS-7533.v1.txt
>
>
> When datanode is told to shutdown via the dfsadmin command during rolling
> upgrade, it may not shutdown. This is because not all writers have responder
> running, but sendOOB() tries anyway. This causes NPE and the shutdown thread
> dies, halting the shutdown after only shutting down DataXceiverServer.
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