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https://issues.apache.org/jira/browse/KAFKA-1762?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14205233#comment-14205233
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Jay Kreps commented on KAFKA-1762:
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Can you elaborate on how this happens? Also are you proposing changing the
default in the producer or just for mirror maker?
> Set MAX_IN_FLIGHT_REQUESTS_PER_CONNECTION default to 1
> ------------------------------------------------------
>
> Key: KAFKA-1762
> URL: https://issues.apache.org/jira/browse/KAFKA-1762
> Project: Kafka
> Issue Type: Bug
> Reporter: Guozhang Wang
> Assignee: Guozhang Wang
>
> The new Producer client introduces a config for the max # of inFlight
> messages. When it is set > 1 on MirrorMaker, however, there is a risk for
> data loss even after KAFKA-1650.
> Changes:
> 1. Set max # of inFlight messages = 1 by default
> 2. Leave comments explaining what the risks are of changing
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