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Posted to jira@kafka.apache.org by "Daniel Wojda (JIRA)" <ji...@apache.org> on 2017/11/06 13:53:01 UTC

[jira] [Created] (KAFKA-6176) numDroppedMessages metric should not be incremented when no data are lost

Daniel Wojda created KAFKA-6176:
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             Summary: numDroppedMessages metric should not be incremented when no data are lost
                 Key: KAFKA-6176
                 URL: https://issues.apache.org/jira/browse/KAFKA-6176
             Project: Kafka
          Issue Type: Bug
          Components: metrics
    Affects Versions: 1.0.0
            Reporter: Daniel Wojda
            Priority: Minor


Mirror Maker can be configured to not lose the data when producing failed. 

However when Mirror Maker is configured correctly and no messages are lost, *numDroppedMessages* metric is increased in case of producer failure. It is misleading for people who monitor Mirror Maker. 

Could we increase that metric when messages are really dropped? Or at least change the name to "numProducerFailuers"?




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