Jark Wu created FLINK-26077:
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Summary: Support operators send request to Coordinator and return
a response
Key: FLINK-26077
URL: https://issues.apache.org/jira/browse/FLINK-26077
Project: Flink
Issue Type: New Feature
Reporter: Jark Wu
Currently, the communitcation between Operator and Coordiator is sigle-way.
That means, after Operator sending a message to Coordiator, it can't wait to
get the response message. In some senarios, the Operator may need to retrieve
some information stored in the Coordinator. Thus, it would be great if we can
have a two-way communication.
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