Naganarasimha G R commented on YARN-4529:

Thanks [~linyiqun] for providing the patches,
IMO it would be better to get opinion from other community members and then 
make some progress as it would avoid some unnecessary rework effort. And its 
just in initial stage, may be it would be better to discuss what would be the 
right approach for the scenarios which we are coming across and then come up 
with jira's and work for it. Thoughts? 
In btw wanted to know whats the scenario you want to address by providing a 
batch kill ? One scenario which we had encountered was lot of application had 
got recovered and the applications were hanging and finally we had to write 
some script to get all the apps of particular state and kill. Hence i was 
thinking providing an admin option should be better to kill in such scenarios. 
And IMO it would be good to have in combination like {{kill applications in 
particular state of particular user in particular queue}} and thought it would 
be better be in {{rmadmin}} cli, thoughts?
cc/ [~ozawa] & [~sunilg]

> Yarn CLI killing applications in batch
> --------------------------------------
>                 Key: YARN-4529
>                 URL: https://issues.apache.org/jira/browse/YARN-4529
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: applications, client
>    Affects Versions: 2.7.1
>            Reporter: Lin Yiqun
>            Assignee: Lin Yiqun
>         Attachments: YARN-4529.001.patch
> We have not a good way to kill applications conveniently when starting some 
> apps unexpected. At present, we have to kill them one by one. We can add some 
> kill command that can kill apps in batch, like these:
> {code}
> -killByAppStates <States>       The states of application that will be killed.
> -killByUser <User name>         Kill running-state applications of specific 
> user.
> {code}

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