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From Gergely Novák (JIRA) <j...@apache.org>
Subject [jira] [Assigned] (HADOOP-14818) Can not show help message of namenode/datanode/nodemanager when process started.
Date Mon, 18 Sep 2017 13:37:00 GMT

     [ https://issues.apache.org/jira/browse/HADOOP-14818?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gergely Novák reassigned HADOOP-14818:
--------------------------------------

    Assignee: Gergely Novák

> Can not show help message of namenode/datanode/nodemanager when process started.
> --------------------------------------------------------------------------------
>
>                 Key: HADOOP-14818
>                 URL: https://issues.apache.org/jira/browse/HADOOP-14818
>             Project: Hadoop Common
>          Issue Type: Improvement
>          Components: bin
>    Affects Versions: 3.0.0-beta1
>            Reporter: Wenxin He
>            Assignee: Gergely Novák
>            Priority: Minor
>         Attachments: HADOOP-14818.001.patch
>
>
> We should always get the help message whenever the process is started or not.
> But now,
> when datanode starts, we get an error message:
> {noformat}
> hadoop# bin/hdfs datanode -h
> datanode is running as process 1701.  Stop it first.
> {noformat}
> when datanode stops, we get what we want:
> {noformat}
> hadoop# bin/hdfs --daemon stop datanode
> hadoop# bin/hdfs datanode -h
> Usage: hdfs datanode [-regular | -rollback | -rollingupgrade rollback ]
>     -regular                 : Normal DataNode startup (default).
> ...
> {noformat}



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