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Posted to issues@flink.apache.org by tzulitai <gi...@git.apache.org> on 2017/01/20 18:29:29 UTC

[GitHub] flink pull request #3185: [FLINK-5375] [doc] Fix Watermark Semantics

GitHub user tzulitai opened a pull request:

    https://github.com/apache/flink/pull/3185

    [FLINK-5375] [doc] Fix Watermark Semantics

    Fix watermark semantics in documenation to be correctly aligned with implementation: a Watermark _t_ declares that event time has reached time _t_ in that stream, meaning that there should be no more elements from the stream with a timestamp **t' <= t** (i.e. events with timestamps older or equal to the watermark).
    
    Also proof-read and corrected some mistakes in event-time / watermark related docs.


You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/tzulitai/flink FLINK-5375

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/flink/pull/3185.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #3185
    
----
commit a9469b982f58a37f395fb53fc7b762b557437e4f
Author: Tzu-Li (Gordon) Tai <tz...@apache.org>
Date:   2017-01-20T18:12:27Z

    [FLINK-5375] [doc] Fix Watermark Semantics

----


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[GitHub] flink issue #3185: [FLINK-5375] [doc] Fix watermark semantics in documentati...

Posted by tzulitai <gi...@git.apache.org>.
Github user tzulitai commented on the issue:

    https://github.com/apache/flink/pull/3185
  
    @aljoscha thank you for the review. I'll address the inline comment and merge this to `master` and `release-1.2`


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[GitHub] flink pull request #3185: [FLINK-5375] [doc] Fix watermark semantics in docu...

Posted by asfgit <gi...@git.apache.org>.
Github user asfgit closed the pull request at:

    https://github.com/apache/flink/pull/3185


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[GitHub] flink pull request #3185: [FLINK-5375] [doc] Fix watermark semantics in docu...

Posted by aljoscha <gi...@git.apache.org>.
Github user aljoscha commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3185#discussion_r97507114
  
    --- Diff: docs/dev/event_time.md ---
    @@ -142,7 +143,7 @@ to use timestamp assignment and watermark generation in the Flink DataStream API
     
     # Event Time and Watermarks
     
    -*Note: Flink implements many techniques from the Dataflow Model. For a good introduction to Event Time and, have also a look at these articles*
    +*Note: Flink implements many techniques from the Dataflow Model. For a good introduction to Event Time and Watermarks, have also a look at these articles -*
    --- End diff --
    
    Is there a superfluous dash at the end?


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