Allen Wittenauer updated HADOOP-13673:
    Attachment: HADOOP-13673.01.patch

* some basic docs
* hdfs/yarn/hadoop now support accoutn switching
* various bugs

> Update sbin/start-* and sbin/stop-* to be smarter
> -------------------------------------------------
>                 Key: HADOOP-13673
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13673
>             Project: Hadoop Common
>          Issue Type: Bug
>          Components: scripts
>    Affects Versions: 3.0.0-alpha1, 3.0.0-alpha2
>            Reporter: Allen Wittenauer
>            Assignee: Allen Wittenauer
>         Attachments: HADOOP-13673.00.patch, HADOOP-13673.01.patch
> As work continues on HADOOP-13397, it's become evident that we need better 
> hooks to start daemons as specifically configured users.  Via the 
> (command)_(subcommand)_USER environment variables in 3.x, we actually have a 
> standardized way to do that.  This in turn means we can make the sbin scripts 
> super functional with a bit of updating:
> * Consolidate start-dfs.sh and start-secure-dns.sh into one script
> * Make start-\*.sh and stop-\*.sh know how to switch users when run as root
> * Undeprecate start/stop-all.sh so that it could be used as root for 
> production purposes and as a single user for non-production users

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