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From "Thomas Weise (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (BEAM-5713) Flink portable runner schedules all tasks of streaming job on same task manager
Date Thu, 11 Oct 2018 23:22:00 GMT

    [ https://issues.apache.org/jira/browse/BEAM-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16647169#comment-16647169
] 

Thomas Weise commented on BEAM-5713:
------------------------------------

With parallelism 4, *almost* same

!image-2018-10-11-16-20-45-221.png|width=100%!

> Flink portable runner schedules all tasks of streaming job on same task manager
> -------------------------------------------------------------------------------
>
>                 Key: BEAM-5713
>                 URL: https://issues.apache.org/jira/browse/BEAM-5713
>             Project: Beam
>          Issue Type: Bug
>          Components: runner-flink
>    Affects Versions: 2.8.0
>            Reporter: Thomas Weise
>            Assignee: Maximilian Michels
>            Priority: Major
>              Labels: portability, portability-flink
>         Attachments: Different SlotSharingGroup.png, With RichParallelSourceFunction
and parallelism 5.png, image-2018-10-11-11-43-50-333.png, image-2018-10-11-16-20-45-221.png
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> The cluster has 9 task managers and 144 task slots total. A simple streaming pipeline
with parallelism of 8 will get all tasks scheduled on the same task manager, causing the host
to be fully booked and the remaining cluster idle.



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