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From "Giovanni Matteo Fumarola (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (YARN-3116) [Collector wireup] We need an assured way to determine if a container is an AM container on NM
Date Thu, 09 Jul 2015 19:08:05 GMT

    [ https://issues.apache.org/jira/browse/YARN-3116?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14621089#comment-14621089
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Giovanni Matteo Fumarola commented on YARN-3116:
------------------------------------------------

[~kkaranasos], thanks for the observation. As [~zjshen] rightly pointed out, YARN-2882 and
YARN-3116 are complementary. We are adding the container type enum to notify the NM whether
its an AM container or not. This is purely internal and we deliberately don't want to expose
it to the Application for security reasons while in YARN-2882, you want to expose the container
type to the application.

> [Collector wireup] We need an assured way to determine if a container is an AM container
on NM
> ----------------------------------------------------------------------------------------------
>
>                 Key: YARN-3116
>                 URL: https://issues.apache.org/jira/browse/YARN-3116
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>          Components: nodemanager, timelineserver
>            Reporter: Zhijie Shen
>            Assignee: Giovanni Matteo Fumarola
>         Attachments: YARN-3116.patch, YARN-3116.v2.patch, YARN-3116.v3.patch, YARN-3116.v4.patch,
YARN-3116.v5.patch, YARN-3116.v6.patch, YARN-3116.v7.patch, YARN-3116.v8.patch
>
>
> In YARN-3030, to start the per-app aggregator only for a started AM container,  we need
to determine if the container is an AM container or not from the context in NM (we can do
it on RM). This information is missing, such that we worked around to considered the container
with ID "xxxx_01" as the AM container. Unfortunately, this is neither necessary or sufficient
condition. We need to have a way to determine if a container is an AM container on NM. We
can add flag to the container object or create an API to do the judgement. Perhaps the distributed
AM information may also be useful to YARN-2877.



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