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https://issues.apache.org/jira/browse/BEAM-9487?focusedWorklogId=655915&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-655915
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ASF GitHub Bot logged work on BEAM-9487:
----------------------------------------
Author: ASF GitHub Bot
Created on: 28/Sep/21 01:13
Start Date: 28/Sep/21 01:13
Worklog Time Spent: 10m
Work Description: codecov[bot] edited a comment on pull request #15603:
URL: https://github.com/apache/beam/pull/15603#issuecomment-928556229
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```diff
@@ Coverage Diff @@
## master #15603 +/- ##
=======================================
Coverage 83.78% 83.78%
=======================================
Files 444 444
Lines 60397 60414 +17
=======================================
+ Hits 50601 50618 +17
Misses 9796 9796
```
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------
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Issue Time Tracking
-------------------
Worklog Id: (was: 655915)
Time Spent: 23h 10m (was: 23h)
> 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: P1
> Labels: EaseOfUse, starter
> Fix For: 2.31.0
>
> Time Spent: 23h 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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