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https://issues.apache.org/jira/browse/SPARK-40778?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17616766#comment-17616766
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Apache Spark commented on SPARK-40778:
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User 'warrenzhu25' has created a pull request for this issue:
https://github.com/apache/spark/pull/38231
> Make HeartbeatReceiver as an IsolatedRpcEndpoint
> ------------------------------------------------
>
> Key: SPARK-40778
> URL: https://issues.apache.org/jira/browse/SPARK-40778
> Project: Spark
> Issue Type: Improvement
> Components: Spark Core
> Affects Versions: 3.3.0
> Reporter: Zhongwei Zhu
> Priority: Minor
>
> All RpcEndpoint including HeartbeatReceiver in driver are sharing one thread
> pool. When there're lots of rpc messages queued, the waiting process time of
> heartbeat time could easily exceed heartbeat timeout. Make HeartbeatReceiver
> extends IsolatedRcpEndpoint then it has dedicated single thread to process
> heartbeat
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