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https://issues.apache.org/jira/browse/SLIDER-430?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14135239#comment-14135239
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Steve Loughran commented on SLIDER-430:
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done, though as the validate() operation still raises an exception if it thinks
the command is invalid, some sets of arguments will still raise exceptions
> provide usage message on invalid registry arguments
> ---------------------------------------------------
>
> Key: SLIDER-430
> URL: https://issues.apache.org/jira/browse/SLIDER-430
> Project: Slider
> Issue Type: Improvement
> Components: client
> Affects Versions: Slider 0.60
> Reporter: Steve Loughran
> Assignee: Steve Loughran
> Original Estimate: 0.5h
> Remaining Estimate: 0.5h
>
> when bad params (e.g. no --list or --getconf) arg, the {{slider registry}}
> doesn't provide a usage message, just a stack trace.
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