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[jira] [Created] (FLINK-9868) Expose channel id to ProcessFunction

Hequn Cheng created FLINK-9868:

             Summary: Expose channel id to ProcessFunction
                 Key: FLINK-9868
                 URL: https://issues.apache.org/jira/browse/FLINK-9868
             Project: Flink
          Issue Type: New Feature
          Components: Local Runtime
            Reporter: Hequn Cheng

Currently, channel id has not been exposed from {{StreamInputProcessor}} to the {{ProcessOperator}} and {{ProcessFunction}}. There are some cases that users want the channel id(), as discovered [here(mailing list)|http://apache-flink-user-mailing-list-archive.2336050.n4.nabble.com/Parallelism-and-keyed-streams-td21501.html].

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