Gilbert Song commented on MESOS-6398:

Agree. Thanks [~Makman2]. I found this huge help text annoying once before, 
since the only valid information is printed on the top. We need to scroll up to 
find out what exactly is wrong from the arguments.

We should improvement the way printing the help text.

> mesos-agent executable: Failing commands display full help text
> ---------------------------------------------------------------
>                 Key: MESOS-6398
>                 URL: https://issues.apache.org/jira/browse/MESOS-6398
>             Project: Mesos
>          Issue Type: Bug
>    Affects Versions: 1.0.1
>         Environment: DC/OS cluster on AWS, 1-master-2-agents (1 public and 1 
> private node) configuration.
>            Reporter: Mischa Kr├╝ger
>            Priority: Minor
> When trying to execute a command (in shell) with `mesos-agent` binary that 
> fails for some reason (in my case it was setting 
> `--executor_environment_variables=config_file.json` which didn't work ^^), 
> the full (insanely huge) help text gets displayed again, and the little 
> information at the beginning of the command stays on top of output.
> This should be definitely changed to display the help text only if 
> `mesos-agent` is started without any command or with `--help`.

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