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[jira] [Created] (FLINK-9681) Make sure minRetentionTime not equal to maxRetentionTime


Hequn Cheng created FLINK-9681:
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             Summary: Make sure minRetentionTime not equal to maxRetentionTime
                 Key: FLINK-9681
                 URL: https://issues.apache.org/jira/browse/FLINK-9681
             Project: Flink
          Issue Type: Improvement
            Reporter: Hequn Cheng
            Assignee: Hequn Cheng


Currently, for a group by, if minRetentionTime equals to maxRetentionTime, the group by operator will register a timer for each record causing performance problem.



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