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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-15066) Spurious error stopping secure datanode
Date Wed, 22 Nov 2017 21:52:00 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-15066?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16263409#comment-16263409
] 

Arpit Agarwal commented on HADOOP-15066:
----------------------------------------

That's a good question. I am not sure why the daemon pid file deletion is attempted twice.

If you setup a secure cluster and try to stop the secure DN the error shows up twice.

> Spurious error stopping secure datanode
> ---------------------------------------
>
>                 Key: HADOOP-15066
>                 URL: https://issues.apache.org/jira/browse/HADOOP-15066
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 3.0.0
>            Reporter: Arpit Agarwal
>            Assignee: Bharat Viswanadham
>         Attachments: HADOOP-15066.00.patch, HADOOP-15066.01.patch
>
>
> There is a spurious error when stopping a secure datanode.
> {code}
> # hdfs --daemon stop datanode
> cat: /var/run/hadoop/hdfs//hadoop-hdfs-root-datanode.pid: No such file or directory
> WARNING: pid has changed for datanode, skip deleting pid file
> cat: /var/run/hadoop/hdfs//hadoop-hdfs-root-datanode.pid: No such file or directory
> WARNING: daemon pid has changed for datanode, skip deleting daemon pid file
> {code}
> The error appears benign. The service was stopped correctly.



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