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https://issues.apache.org/jira/browse/FLINK-5903?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15882126#comment-15882126
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Tao Wang commented on FLINK-5903:
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I've located the reason and fix it ASAP.
> taskmanager.numberOfTaskSlots and yarn.containers.vcores did not work well in
> YARN mode
> ---------------------------------------------------------------------------------------
>
> Key: FLINK-5903
> URL: https://issues.apache.org/jira/browse/FLINK-5903
> Project: Flink
> Issue Type: Bug
> Components: YARN
> Reporter: Tao Wang
>
> Now Flink did not respect taskmanager.numberOfTaskSlots and
> yarn.containers.vcores in flink-conf.yaml, but only -s parameter in CLI.
> Details is that taskmanager.numberOfTaskSlots is not working in anyway
> andyarn.containers.vcores is only used in requesting container(TM) resources
> but not aware to TM, which means TM will always think it has default(1) Slots
> if -s is not configured.
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