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https://issues.apache.org/jira/browse/FLINK-33743?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yuxin Tan reassigned FLINK-33743:
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Assignee: (was: Yuxin Tan)
> Support consuming multiple subpartitions on a single channel
> ------------------------------------------------------------
>
> Key: FLINK-33743
> URL: https://issues.apache.org/jira/browse/FLINK-33743
> Project: Flink
> Issue Type: Sub-task
> Components: Runtime / Network
> Reporter: Yuxin Tan
> Priority: Major
>
> In Flink jobs that use the AdaptiveBatchScheduler and enable adaptive
> parallelism, a downstream operator might consume multiple subpartitions from
> an upstream operator. While downstream operators would create an InputChannel
> for each upstream subpartition in Flink's current implementation, The many
> InputChannels created in this situation may consume more memory resources
> than needed, affecting the usability of Hybrid Shuffle and
> AdaptiveBatchScheduler. In order to solve this problem, we plan to allow one
> InputChannel to consume multiple subpartitions.
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