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https://issues.apache.org/jira/browse/FLINK-10462?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhijiang closed FLINK-10462.
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Resolution: Not A Problem
Close it now for cleanup unless we find it necessary to reopen it future.
> Remove ConnectionIndex for further sharing tcp connection in credit-based
> mode
> -------------------------------------------------------------------------------
>
> Key: FLINK-10462
> URL: https://issues.apache.org/jira/browse/FLINK-10462
> Project: Flink
> Issue Type: Improvement
> Components: Runtime / Network
> Affects Versions: 1.5.0, 1.5.1, 1.5.2, 1.5.3, 1.5.4, 1.6.0, 1.6.1
> Reporter: Zhijiang
> Assignee: Zhijiang
> Priority: Minor
>
> Every {{IntermediateResult}} generates a random {{ConnectionIndex}} which
> will be included in {{ConnectionID}}.
> The {{RemoteInputChannel}} requests to establish tcp connection via
> {{ConnectionID}}. That means one tcp connection may be shared by multiple
> {{RemoteInputChannel}} {{s which have the same ConnectionID}}. To do so, we
> can reduce the physical connections between two \{{TaskManager}} s, and it
> brings benefits for large scale jobs.
> But this sharing is limited only for the same {{IntermediateResult}}, and I
> think it is mainly because we may temporarily switch off {{autoread}} for the
> channel during back pressure in previous network flow control. For
> credit-based mode, the channel is always open for transporting different
> intermediate data, so we can further share the tcp connection for different
> {{IntermediateResults}} to remove the limit.
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