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https://issues.apache.org/jira/browse/FLINK-1747?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14568078#comment-14568078
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Ufuk Celebi commented on FLINK-1747:
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[~StephanEwen], was this a duplicate of FLINK-2041?
> Remove deadlock detection and pipeline breaker placement in optimizer
> ---------------------------------------------------------------------
>
> Key: FLINK-1747
> URL: https://issues.apache.org/jira/browse/FLINK-1747
> Project: Flink
> Issue Type: Improvement
> Components: Optimizer
> Affects Versions: master
> Reporter: Ufuk Celebi
> Priority: Minor
>
> The deadlock detection in the optimizer, which places pipeline breaking
> caches has become redundant with recently added changes. We now use blocking
> data exchanges for branching programs, which are merged again at a later
> point.
> Therefore, we can start removing the respective code in the optimizer.
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