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Posted to issues@beam.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2021/05/11 15:53:00 UTC
[jira] [Work logged] (BEAM-9487) GBKs on unbounded pcolls with
global windows and no triggers should fail
[ https://issues.apache.org/jira/browse/BEAM-9487?focusedWorklogId=594599&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-594599 ]
ASF GitHub Bot logged work on BEAM-9487:
----------------------------------------
Author: ASF GitHub Bot
Created on: 11/May/21 15:52
Start Date: 11/May/21 15:52
Worklog Time Spent: 10m
Work Description: zhoufek opened a new pull request #14780:
URL: https://github.com/apache/beam/pull/14780
Adds a check to make sure that the PCollection is either bounded, not using global windowing, or not using a default trigger.
Draft Notes:
This seems to work as intended, but it is causing failures in `assert_that` in testing/util.py. Some stuff I've tried:
* Apply non-default triggers to one or both input PCollections
* Change to use Flatten() | Filter(...) | Map(...)
* Pass the input PCollection as side input to `Map` using `pvalue.AsList`
------------------------
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`ValidatesRunner` compliance status (on master branch)
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Examples testing status on various runners
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Post-Commit SDK/Transform Integration Tests Status (on master branch)
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Pre-Commit Tests Status (on master branch)
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Issue Time Tracking
-------------------
Worklog Id: (was: 594599)
Remaining Estimate: 0h
Time Spent: 10m
> GBKs on unbounded pcolls with global windows and no triggers should fail
> ------------------------------------------------------------------------
>
> Key: BEAM-9487
> URL: https://issues.apache.org/jira/browse/BEAM-9487
> Project: Beam
> Issue Type: Bug
> Components: sdk-py-core
> Reporter: Udi Meiri
> Assignee: Zachary Houfek
> Priority: P2
> Labels: EaseOfUse, starter
> Time Spent: 10m
> Remaining Estimate: 0h
>
> This, according to "4.2.2.1 GroupByKey and unbounded PCollections" in https://beam.apache.org/documentation/programming-guide/.
> bq. If you do apply GroupByKey or CoGroupByKey to a group of unbounded PCollections without setting either a non-global windowing strategy, a trigger strategy, or both for each collection, Beam generates an IllegalStateException error at pipeline construction time.
> Example where this doesn't happen in Python SDK: https://stackoverflow.com/questions/60623246/merge-pcollection-with-apache-beam
> I also believe that this unit test should fail, since test_stream is unbounded, uses global window, and has no triggers.
> {code}
> def test_global_window_gbk_fail(self):
> with TestPipeline() as p:
> test_stream = TestStream()
> _ = p | test_stream | GroupByKey()
> {code}
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