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https://issues.apache.org/jira/browse/SPARK-9635?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sean Owen reopened SPARK-9635:
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> It's not necessary for driver to send "RequestExecutors" message to
> ApplicationMaster when killing executors
> --------------------------------------------------------------------------------------------------------------
>
> Key: SPARK-9635
> URL: https://issues.apache.org/jira/browse/SPARK-9635
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Affects Versions: 1.4.1
> Environment: export SPARK_EXECUTOR_MEMORY=16G
> export SPARK_DRIVER_MEMORY=14G
> export SPARK_EXECUTOR_CORES=4
> Reporter: KaiXinXIaoLei
>
> I see the code. When driver kill executors, will send "RequestExecutors" to
> ApplicationMaster , and change the number of executors requested by driver.
> Other, in spark-dynamic-executor-allocation, when the number of tasks is
> reduced, the desired number of executors will be changed.
> The reason for driver to kill executor is : there is no tasks in executor or
> there is heartbeat of exectuo is timed out.
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