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https://issues.apache.org/jira/browse/YARN-2518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14123816#comment-14123816
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BoYang commented on YARN-2518:
------------------------------

We tried to use a custom Container Executor implementation, and hook it up with 
YARN. It seems working. But it would be still nice if YARN can provide native 
support for in-process container executor.

> Support in-process container executor
> -------------------------------------
>
>                 Key: YARN-2518
>                 URL: https://issues.apache.org/jira/browse/YARN-2518
>             Project: Hadoop YARN
>          Issue Type: New Feature
>          Components: nodemanager
>    Affects Versions: 2.5.0
>         Environment: Linux, Windows
>            Reporter: BoYang
>            Priority: Minor
>              Labels: container, dispatch, in-process, job, node
>
> Node Manage always creates a new process for a new application. We have hit a 
> scenario where we want the node manager to execute the application inside its 
> own process, so we get fast response time. It would be nice if Node Manager 
> or YARN can provide native support for that.
> In general, the scenario is that we have a long running process which can 
> accept requests and process the requests inside its own process. Since YARN 
> is good at scheduling jobs, we want to use YARN to dispatch jobs (e.g. 
> requests in JSON) to the long running process. In that case, we do not want 
> YARN container to spin up a new process for each request. Instead, we want 
> YARN container to send the request to the long running process for further 
> processing.



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