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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5542) YARN client incorrectly uses local YARN config to check vcore capacity
Date Tue, 09 Oct 2018 07:46:00 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5542?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16642916#comment-16642916
] 

ASF GitHub Bot commented on FLINK-5542:
---------------------------------------

leanken commented on issue #6775: [FLINK-5542] use YarnCluster vcores setting to do MaxVCore
validation
URL: https://github.com/apache/flink/pull/6775#issuecomment-428093652
 
 
   @GJL Kindly remind. Build is ready to go.

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> YARN client incorrectly uses local YARN config to check vcore capacity
> ----------------------------------------------------------------------
>
>                 Key: FLINK-5542
>                 URL: https://issues.apache.org/jira/browse/FLINK-5542
>             Project: Flink
>          Issue Type: Bug
>          Components: YARN
>    Affects Versions: 1.1.4, 1.5.3, 1.6.0, 1.7.0
>            Reporter: Shannon Carey
>            Priority: Major
>              Labels: pull-request-available
>             Fix For: 1.7.0
>
>
> See http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/1-1-4-on-YARN-vcores-change-td11016.html
> When using bin/yarn-session.sh, AbstractYarnClusterDescriptor line 271 in 1.1.4 is comparing
the user's selected number of vcores to the vcores configured in the local node's YARN config
(from YarnConfiguration eg. yarn-site.xml and yarn-default.xml). It incorrectly prevents Flink
from launching even if there is sufficient vcore capacity on the cluster.
> That is not correct, because the application will not necessarily run on the local node.
For example, if running the yarn-session.sh client from the AWS EMR master node, the vcore
count there may be different from the vcore count on the core nodes where Flink will actually
run.
> A reasonable way to fix this would probably be to reuse the logic from "yarn-session.sh
-q" (FlinkYarnSessionCli line 550) which knows how to get vcore information from the real
worker nodes.  Alternatively, perhaps we could remove the check entirely and rely on YARN's
Scheduler to determine whether sufficient resources exist.



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