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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-5512) RabbitMQ documentation should inform that exactly-once holds for RMQSource only when parallelism is 1
Date Wed, 18 Jan 2017 10:14:26 GMT

    [ https://issues.apache.org/jira/browse/FLINK-5512?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15827779#comment-15827779
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ASF GitHub Bot commented on FLINK-5512:
---------------------------------------

Github user alpinegizmo commented on the issue:

    https://github.com/apache/flink/pull/3136
  
    Very helpful. But I did stumble on this sentence -- I'm not sure what "of a queue" is
telling me. 
    
    > This limitation is mainly due to RabbitMQ's approach to dispatching messages of a
queue across multiple consumers.
    
    Would it be accurate to say "... dispatching messages from a single queue to multiple
consumers" ?



> RabbitMQ documentation should inform that exactly-once holds for RMQSource only when
parallelism is 1  
> -------------------------------------------------------------------------------------------------------
>
>                 Key: FLINK-5512
>                 URL: https://issues.apache.org/jira/browse/FLINK-5512
>             Project: Flink
>          Issue Type: Improvement
>          Components: Documentation
>            Reporter: Tzu-Li (Gordon) Tai
>            Assignee: Tzu-Li (Gordon) Tai
>             Fix For: 1.2.0
>
>
> See here for the reasoning: FLINK-2624. We should add an informative warning about this
limitation in the docs.



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