[jira] [Commented] (SPARK-24942) Improve cluster resource management with jobs containing barrier stage

["Dongjoon Hyun (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/SPARK-24942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17840913#comment-17840913 ] 

Dongjoon Hyun commented on SPARK-24942:
---------------------------------------

I removed the outdated target version, `3.2.0`, from this Jira. For now, Apache Spark community has no target version for this issue.

> Improve cluster resource management with jobs containing barrier stage
> ----------------------------------------------------------------------
>
>                 Key: SPARK-24942
>                 URL: https://issues.apache.org/jira/browse/SPARK-24942
>             Project: Spark
>          Issue Type: Improvement
>          Components: Spark Core
>    Affects Versions: 3.1.0
>            Reporter: Xingbo Jiang
>            Priority: Major
>
> https://github.com/apache/spark/pull/21758#discussion_r205652317
> We shall improve cluster resource management to address the following issues:
> - With dynamic resource allocation enabled, it may happen that we acquire some executors (but not enough to launch all the tasks in a barrier stage) and later release them due to executor idle time expire, and then acquire again.
> - There can be deadlock with two concurrent applications. Each application may acquire some resources, but not enough to launch all the tasks in a barrier stage. And after hitting the idle timeout and releasing them, they may acquire resources again, but just continually trade resources between each other.



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