Sean Owen commented on SPARK-17546:

{{hostname --fqdn}} doesn't work on OS X, so may be specific to some versions 
of Linux et al. However looks like {{hostname -f}} is a synonym on Linux, and 
works on OS X (though doesn't necessarily give more info). Go for it with 
{{-f}} I think.

> start-* scripts should use hostname --fqdn 
> -------------------------------------------
>                 Key: SPARK-17546
>                 URL: https://issues.apache.org/jira/browse/SPARK-17546
>             Project: Spark
>          Issue Type: Bug
>    Affects Versions: 2.0.0
>            Reporter: Kevin Burton
> The ./sbin/start-slaves.sh and ./sbin/start-master.sh scripts use just 
> 'hostname' and if /etc/hostname isn't using a fqdn then you don't get the 
> fully qualified domain name.
> If you upgrade your script to hostname --fqdn the problem is solved. 

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