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https://issues.apache.org/jira/browse/GEARPUMP-359?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Manu Zhang resolved GEARPUMP-359.
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Resolution: Fixed
Fix Version/s: 0.8.5
Issue resolved by pull request 234
[https://github.com/apache/incubator-gearpump/pull/234]
> 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
> Fix For: 0.8.5
>
>
> {{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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