Lijie Wang created FLINK-24980:
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             Summary: Collect sizes of result partitions when tasks finish
                 Key: FLINK-24980
                 URL: https://issues.apache.org/jira/browse/FLINK-24980
             Project: Flink
          Issue Type: Sub-task
          Components: Runtime / Metrics
            Reporter: Lijie Wang


The adaptive batch job scheduler needs to know the size of each result 
partition when the task is finished.

This issue will introduce the *numBytesProduced* counter and register it into 
{*}TaskIOMetricGroup{*}, to record the size of each result partition. 



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