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https://issues.apache.org/jira/browse/SPARK-24817?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16560096#comment-16560096
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Apache Spark commented on SPARK-24817:
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User 'jiangxb1987' has created a pull request for this issue:
https://github.com/apache/spark/pull/21898
> Implement BarrierTaskContext.barrier()
> --------------------------------------
>
> Key: SPARK-24817
> URL: https://issues.apache.org/jira/browse/SPARK-24817
> Project: Spark
> Issue Type: New Feature
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: Jiang Xingbo
> Priority: Major
>
> Implement BarrierTaskContext.barrier(), to support global sync between all
> the tasks in a barrier stage. The global sync shall finish immediately once
> all tasks in the same barrier stage reaches the same barrier.
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