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https://issues.apache.org/jira/browse/BEAM-5713?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16646847#comment-16646847
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Thomas Weise commented on BEAM-5713:
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Just to confirm my observation: We have 16 task slots per TM. The pipeline has
5 operators and parallelism 8. What I see it that only 8 task slots on a single
task manager are used.
> 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
>
> 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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