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https://issues.apache.org/jira/browse/BEAM-4255?focusedWorklogId=99792&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-99792
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ASF GitHub Bot logged work on BEAM-4255:
----------------------------------------
Author: ASF GitHub Bot
Created on: 08/May/18 23:28
Start Date: 08/May/18 23:28
Worklog Time Spent: 10m
Work Description: huygaa11 opened a new pull request #5311: [BEAM-4255]
Set singleton view writers' accumulation mode to discarding
URL: https://github.com/apache/beam/pull/5311
The code snippet below was writing multiple values to the sideInput,
resulting in exception: "PCollection with more than one element accessed as a
singleton view."
PCollectionView<Integer> globalView = input
.apply(Window.<Integer>into(new GlobalWindows())
.triggering(Repeatedly.forever(AfterPane.elementCountAtLeast(1)))
.accumulatingFiredPanes())
.apply(Sum.integersGlobally().asSingletonView())
This PR sets the accumulation mode to discarding for singleton view writer,
so that the GBK's used by view writers do not accumulate combine results.
------------------------
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Issue Time Tracking
-------------------
Worklog Id: (was: 99792)
Time Spent: 10m
Remaining Estimate: 0h
> GloballyAsSingletonView is writing multiple values to the SingletonView
> -----------------------------------------------------------------------
>
> Key: BEAM-4255
> URL: https://issues.apache.org/jira/browse/BEAM-4255
> Project: Beam
> Issue Type: Bug
> Components: sdk-java-core
> Affects Versions: 2.4.0
> Reporter: Batkhuyag Batsaikhan
> Assignee: Batkhuyag Batsaikhan
> Priority: Major
> Fix For: 3.0.0
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> The code snippet below is writing multiple values to the sideInput. Resulting
> in exception: "PCollection with more than one element accessed as a singleton
> view."
> PCollectionView<Integer> globalView = input
> .apply(Window.<Integer>into(new GlobalWindows())
> .triggering(Repeatedly.forever(AfterPane.elementCountAtLeast(1)))
> .accumulatingFiredPanes())
> .apply(Sum.integersGlobally().asSingletonView())
>
>
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