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https://issues.apache.org/jira/browse/FLINK-12800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16861937#comment-16861937
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Stephan Ewen commented on FLINK-12800:
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+1
Are you working on a pull request for this?
> Harden Tests when availableProcessors is 1
> ------------------------------------------
>
> Key: FLINK-12800
> URL: https://issues.apache.org/jira/browse/FLINK-12800
> Project: Flink
> Issue Type: Bug
> Components: Tests
> Affects Versions: 1.8.0
> Reporter: leesf
> Assignee: leesf
> Priority: Major
> Fix For: 1.9.0
>
>
> Some tests failed when Runtime.getRuntime().availableProcessors() is 1. The
> source vertex and other vertex may chained, thus make test failed. such as
> AsyncWaitOperatorTest#testOperatorChainWithProcessingTime
> StreamingJobGraphGeneratorTest#testChainStartEndSetting
> StreamOperatorChainingTest#testMultiChainingWithObjectReuse
> StreamOperatorChainingTest#testMultiChainingWithoutObjectReuse
>
> So we would specify parallelism of vertex directly to let its not chained
> with source .
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