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https://issues.apache.org/jira/browse/HDFS-165?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12862338#action_12862338
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Jakob Homan commented on HDFS-165:
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bq. I will merge [this patch] into the lifecycle patch rather than split out 
(as I have done here) 
Steve, I read this to mean this patch is no longer necessary and can be closed 
as WontFix?  Does this sound good to you?


> NPE in datanode.handshake()
> ---------------------------
>
>                 Key: HDFS-165
>                 URL: https://issues.apache.org/jira/browse/HDFS-165
>             Project: Hadoop HDFS
>          Issue Type: Bug
>    Affects Versions: 0.20.1
>            Reporter: Steve Loughran
>            Assignee: Steve Loughran
>            Priority: Minor
>             Fix For: 0.22.0
>
>         Attachments: HDFS-165.patch
>
>
> It appears possible to raise an NPE in DataNode.handshake() if the startup 
> protocol gets interrupted or fails in some manner

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