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https://issues.apache.org/jira/browse/HDFS-4134?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13493515#comment-13493515
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Suresh Srinivas commented on HDFS-4134:
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+1 for the patch.
> hadoop namenode & namenode entry points should return -1 exit code on bad
> arguments
> -----------------------------------------------------------------------------------
>
> Key: HDFS-4134
> URL: https://issues.apache.org/jira/browse/HDFS-4134
> Project: Hadoop HDFS
> Issue Type: Bug
> Components: name-node
> Affects Versions: 1.0.4
> Reporter: Steve Loughran
> Priority: Minor
> Attachments: HDFS-4134.patch
>
>
> When you go {{hadoop namenode start}} (or some other bad argument to the
> namenode), a usage message is generated -but the script returns 0.
> This stops it being a robust command to invoke from other scripts -and is
> inconsistent with the JT & TT entry points, that do return -1 on a usage
> message
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