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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/11/13 00:45:00 UTC

[jira] [Work logged] (BEAM-8645) TimestampCombiner incorrect in beam python

     [ https://issues.apache.org/jira/browse/BEAM-8645?focusedWorklogId=342317&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-342317 ]

ASF GitHub Bot logged work on BEAM-8645:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 13/Nov/19 00:44
            Start Date: 13/Nov/19 00:44
    Worklog Time Spent: 10m 
      Work Description: HuangLED commented on pull request #10081: [BEAM-8645] A test case to show the expected behavior of TimestampCombiner.
URL: https://github.com/apache/beam/pull/10081
 
 
   This PR does not resolve BEAM-8645, but rather shows how to reproduce the [likely] bug. 
   
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Issue Time Tracking
-------------------

            Worklog Id:     (was: 342317)
    Remaining Estimate: 0h
            Time Spent: 10m

> TimestampCombiner incorrect in beam python
> ------------------------------------------
>
>                 Key: BEAM-8645
>                 URL: https://issues.apache.org/jira/browse/BEAM-8645
>             Project: Beam
>          Issue Type: Bug
>          Components: sdk-py-core
>            Reporter: Ruoyun Huang
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> When we have a TimestampValue on combine: 
> {code:java}
> main_stream = (p                   
> | 'main TestStream' >> TestStream()                   .add_elements([window.TimestampedValue(('k', 100), 0)])                   .add_elements([window.TimestampedValue(('k', 400), 9)])                   .advance_watermark_to_infinity()                   
> | 'main windowInto' >> beam.WindowInto(                         window.FixedWindows(10),                      timestamp_combiner=TimestampCombiner.OUTPUT_AT_LATEST)                   | 'Combine' >> beam.CombinePerKey(sum))
> The expect timestamp should be:
> LATEST:    (('k', 500), Timestamp(9)),
> EARLIEST:    (('k', 500), Timestamp(0)),
> END_OF_WINDOW: (('k', 500), Timestamp(10)),
> But current py streaming gives following results: 
> LATEST:    (('k', 500), Timestamp(10)),
> EARLIEST:    (('k', 500), Timestamp(10)),
> END_OF_WINDOW: (('k', 500), Timestamp(9.99999999)),
> More details and discussions:
> https://lists.apache.org/thread.html/d3af1f2f84a2e59a747196039eae77812b78a991f0f293c717e5f4e1@%3Cdev.beam.apache.org%3E
> {code}



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