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https://issues.apache.org/jira/browse/SPARK-27073?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcelo Vanzin resolved SPARK-27073.
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Resolution: Fixed
Fix Version/s: 3.0.0
Issue resolved by pull request 23989
[https://github.com/apache/spark/pull/23989]
> Fix a race condition when handling of IdleStateEvent
> ----------------------------------------------------
>
> Key: SPARK-27073
> URL: https://issues.apache.org/jira/browse/SPARK-27073
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 2.0.0, 2.4.0
> Reporter: dzcxzl
> Priority: Minor
> Fix For: 3.0.0
>
>
> When TransportChannelHandler processes IdleStateEvent, it first calculates
> whether the last request time has timed out.
> At this time, TransportClient.sendRpc initiates a request.
> TransportChannelHandler gets responseHandler.numOutstandingRequests() > 0,
> causing the normal connection to be closed.
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