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https://issues.apache.org/jira/browse/BEAM-2571?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16084001#comment-16084001
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ASF GitHub Bot commented on BEAM-2571:
--------------------------------------
GitHub user aljoscha opened a pull request:
https://github.com/apache/beam/pull/3550
[BEAM-2571] CombineTest.testSlidingWindowsCombineWithContext
R: @kennknowles @JingsongLi
You can merge this pull request into a Git repository by running:
$ git pull https://github.com/aljoscha/beam
jira-2571-fix-flink-watermark-issues
Alternatively you can review and apply these changes as the patch at:
https://github.com/apache/beam/pull/3550.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 #3550
----
commit dee393b2a4f287509a0af5b44841216804cae3b2
Author: Aljoscha Krettek <[email protected]>
Date: 2017-07-12T12:35:58Z
[BEAM-2571] Add check for output watermark in DoFnOperator on close()
commit 39e47d973a243dfdf154b3be3e234e7bc598d4c5
Author: Aljoscha Krettek <[email protected]>
Date: 2017-07-12T12:39:58Z
[BEAM-2571] Clarify pushedback variable name in DoFnOperator
commit 31791beca9d58a24cf0d851d137a1c1526221c32
Author: Aljoscha Krettek <[email protected]>
Date: 2017-07-12T12:42:37Z
[BEAM-2571] Change DoFnOperator to use Long.MAX_VALUE as max watermark
This is in line with what Flink does and what BoundesSourceWrapper and
UnboundedSourceWrapper do.
commit d0aee3d08e44de6587daa209592b766aced810bf
Author: Aljoscha Krettek <[email protected]>
Date: 2017-07-12T13:38:06Z
[BEAM-2571] Respect watermark contract in Flink DoFnOperator
In Flink, a watermark T specifies that there will be no elements with a
timestamp <= T in the future. In Beam, a watermark T specifies that
there will not be element with a timestamp < T in the future. This leads
to problems when the watermark is exactly "on the timer timestamp", most
prominently, this happened with Triggers, where Flink would fire the
Trigger too early and the Trigger would determine (based on the
watermark) that it is not yet time to fire the window while Flink
thought it was time.
This also adds a test that specifially tests the edge case.
----
> Flink ValidatesRunner failing CombineTest.testSlidingWindowsCombineWithContext
> ------------------------------------------------------------------------------
>
> Key: BEAM-2571
> URL: https://issues.apache.org/jira/browse/BEAM-2571
> Project: Beam
> Issue Type: Bug
> Components: runner-flink
> Reporter: Kenneth Knowles
> Assignee: Aljoscha Krettek
> Fix For: 2.1.0
>
>
> This appears to have been caused by https://github.com/apache/beam/pull/3429
> which fixes a couple errors in how trigger timers were processed / final
> panes labeled.
> I am investigating, considering roll back vs forward fix. Since it is an
> esoteric use case where I would advise users to use a stateful DoFn instead,
> I think the bug fixed probably outweighs the bug introduced. I would like to
> fix for 2.1.0 but will report back soon.
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