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https://issues.apache.org/jira/browse/SPARK-31485?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan reassigned SPARK-31485:
-----------------------------------
Assignee: wuyi
> Barrier stage can hang if only partial tasks launched
> -----------------------------------------------------
>
> Key: SPARK-31485
> URL: https://issues.apache.org/jira/browse/SPARK-31485
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.4.0
> Reporter: wuyi
> Assignee: wuyi
> Priority: Major
>
> The issue can be reproduced by following test:
>
> {code:java}
> initLocalClusterSparkContext(2)
> val rdd0 = sc.parallelize(Seq(0, 1, 2, 3), 2)
> val dep = new OneToOneDependency[Int](rdd0)
> val rdd = new MyRDD(sc, 2, List(dep),
> Seq(Seq("executor_h_0"),Seq("executor_h_0")))
> rdd.barrier().mapPartitions { iter =>
> BarrierTaskContext.get().barrier()
> iter
> }.collect()
> {code}
>
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