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  1. Flink
  2. FLINK-23842

Add log messages for reader registrations and split requests.

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      Currently, there are is nothing logged when source enumerators get reader registration events, or when they receive split requests.

      While some specific source implementations log this in their implementation, for the general case, this information is missing, even though it is super valuable when debugging and understanding the work assignment behavior.

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            sewen Stephan Ewen
            sewen Stephan Ewen
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