[jira] [Commented] (SPARK-31485) Barrier stage can hang if only partial tasks launched

["Apache Spark (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-31485?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17101690#comment-17101690 ] 

Apache Spark commented on SPARK-31485:
--------------------------------------

User 'Ngone51' has created a pull request for this issue:
https://github.com/apache/spark/pull/28476

> 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
>             Fix For: 2.4.6
>
>
> 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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