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https://issues.apache.org/jira/browse/BEAM-4255?focusedWorklogId=100323&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-100323
]
ASF GitHub Bot logged work on BEAM-4255:
----------------------------------------
Author: ASF GitHub Bot
Created on: 09/May/18 23:14
Start Date: 09/May/18 23:14
Worklog Time Spent: 10m
Work Description: huygaa11 commented on a change in pull request #5311:
[BEAM-4255] Set singleton view writers' accumulation mode to discarding
URL: https://github.com/apache/beam/pull/5311#discussion_r187202199
##########
File path:
sdks/java/core/src/main/java/org/apache/beam/sdk/transforms/Combine.java
##########
@@ -1283,6 +1283,10 @@ private GloballyAsSingletonView(
insertDefault,
insertDefault ? fn.defaultValue() : null,
combined.getCoder());
+
+ // GBK's inside view writers for singleton view should discard previous
values.
+
materializationInput.setWindowingStrategyInternal(input.getWindowingStrategy()
Review comment:
`Window.configure()` does not seem to work. I will take a little break from
this bug and re-visit it soon.
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Issue Time Tracking
-------------------
Worklog Id: (was: 100323)
Time Spent: 40m (was: 0.5h)
> 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: 40m
> 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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