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From "Weiwei Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-6355) [Umbrella] Preprocessor framework for AM and Client interactions with the RM
Date Tue, 05 Dec 2017 09:21:00 GMT

    [ https://issues.apache.org/jira/browse/YARN-6355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16278262#comment-16278262

Weiwei Yang commented on YARN-6355:

Hi [~asuresh]

Thanks for the explanation, if this is the design, can we elaborate this in {{yarn-default.xml}}
by adding more concrete description to property {{yarn.resourcemanager.application-master-service.processors}}?
As this is the only doc user could count on, so it will be very helpful to explain briefly
how it works. Does that make sense?


> [Umbrella] Preprocessor framework for AM and Client interactions with the RM
> ----------------------------------------------------------------------------
>                 Key: YARN-6355
>                 URL: https://issues.apache.org/jira/browse/YARN-6355
>             Project: Hadoop YARN
>          Issue Type: Improvement
>            Reporter: Arun Suresh
>            Assignee: Arun Suresh
>              Labels: amrmproxy, resourcemanager
>         Attachments: YARN-6355-one-pager.pdf, YARN-6355.001.patch, YARN-6355.002.patch,
YARN-6355.003.patch, YARN-6355.004.patch, YARN-6355.005.patch, YARN-6355.006.patch, YARN-6355.007.patch
> Currently on the NM, we have the {{AMRMProxy}} framework to intercept the AM <->
RM communication and enforce policies. This is used both by YARN federation (YARN-2915) as
well as Distributed Scheduling (YARN-2877).
> This JIRA proposes to introduce a similar framework on the the RM side, so that pluggable
policies can be enforced on ApplicationMasterService centrally as well.
> This would be similar in spirit to a Java Servlet Filter Chain. Where the order of the
interceptors can declared externally.
> Once possible usecase would be:
> the {{OpportunisticContainerAllocatorAMService}} is implemented as a wrapper over the
{{ApplicationMasterService}}. It would probably be better to implement it as an Interceptor.

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