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https://issues.apache.org/jira/browse/FLINK-21844?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Austin Cawley-Edwards updated FLINK-21844:
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Description:
I believe we should not automatically change the maxParallelism when the
"scheduler-mode" is set to "reactive", because:
* it magically breaks savepoint compatibility, when you switch between default
and reactive scheduler mode
* the maximum parallelism is an orthogonal concern that in my opinion should
not be mixed with the scheduler mode. The reactive scheduler should respect the
maxParallelism, but it should not set/ change its default value.
was:
I believe we should not automatically change the maxParallelism when the
"scheduler-mode" is set to "reactive", because:
* it magically breaks savepoint compatibility, when you switch between default
and reactive scheduler mode
* the maximum parallelism is an orthogonal concern that in my opinion should
not be mixed with the scheduler mode. The reactive scheduler should respect the
maxParallelism, but it should not set change its default value.
> Do not auto-configure maxParallelism when setting "scheduler-mode: reactive"
> ----------------------------------------------------------------------------
>
> Key: FLINK-21844
> URL: https://issues.apache.org/jira/browse/FLINK-21844
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Coordination
> Reporter: Konstantin Knauf
> Assignee: Austin Cawley-Edwards
> Priority: Major
> Fix For: 1.13.0
>
>
> I believe we should not automatically change the maxParallelism when the
> "scheduler-mode" is set to "reactive", because:
> * it magically breaks savepoint compatibility, when you switch between
> default and reactive scheduler mode
> * the maximum parallelism is an orthogonal concern that in my opinion should
> not be mixed with the scheduler mode. The reactive scheduler should respect
> the maxParallelism, but it should not set/ change its default value.
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