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https://issues.apache.org/jira/browse/HADOOP-11565?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14315029#comment-14315029
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Allen Wittenauer commented on HADOOP-11565:
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slaves specifically means "use the slaves" file. We reference it like this
throughout large chunks of the documentation. Without --slaves, it is
(effectively) the local host, i.e., no ssh and is the current functionality.
> Add --slaves shell option
> -------------------------
>
> Key: HADOOP-11565
> URL: https://issues.apache.org/jira/browse/HADOOP-11565
> Project: Hadoop Common
> Issue Type: New Feature
> Components: scripts
> Reporter: Allen Wittenauer
> Attachments: HADOOP-11565-00.patch
>
>
> Add a --slaves shell option to hadoop-config.sh to trigger the given command
> on slave nodes. This is required to deprecate hadoop-daemons.sh and
> yarn-daemons.sh.
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