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From "Huafeng Wang (JIRA)" <j...@apache.org>
Subject [jira] [Created] (GEARPUMP-359) The premature OutputWatermark advancing logic in Subscription is not right
Date Thu, 26 Oct 2017 05:50:00 GMT
Huafeng Wang created GEARPUMP-359:
-------------------------------------

             Summary: The premature OutputWatermark advancing logic in Subscription is not
right
                 Key: GEARPUMP-359
                 URL: https://issues.apache.org/jira/browse/GEARPUMP-359
             Project: Apache Gearpump
          Issue Type: Bug
            Reporter: Huafeng Wang
            Assignee: Huafeng Wang


{{Subscription}} will update processingWatermark when sending a message and update outputWatermark
when receiving an Ack message. It will cause prematurely updating the outputWatermark in such
scenario: the {{Subscription}} already sent 200 messages to downstream and now the processingWatermark
is 200th message's watermark, then it receives the first 100 messages' Ack and it will advance
the outputWatermark to 200th message's watermark, not the 100th one, which is wrong.



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