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https://issues.apache.org/jira/browse/SPARK-35722?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17361469#comment-17361469
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Takeshi Yamamuro commented on SPARK-35722:
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Could you describe more in the description? The current one looks unobvious.
> wait until something does get queued
> ------------------------------------
>
> Key: SPARK-35722
> URL: https://issues.apache.org/jira/browse/SPARK-35722
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.0.0
> Reporter: yikf
> Priority: Minor
> Fix For: 3.2.0
>
>
> if nothing has been added to the queue, should wait until something does get
> queued instead of loop after timeout.
> It prevents an ineffective cycle.
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