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https://issues.apache.org/jira/browse/SPARK-7699?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14550163#comment-14550163
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Saisai Shao commented on SPARK-7699:
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The problem is as you mentioned here:
{code}
val oldNumExecutorsTarget = numExecutorsTarget
numExecutorsTarget = math.max(maxNeeded, minNumExecutors)
client.requestTotalExecutors(numExecutorsTarget)
{code}
If this system is idle, {{numExecutorsTarget}} will use {{minNumExecutors}}, it
is OK in the middle run-time, but at start of application, we should use
{{initialExecutors}}, as you configured *3*, not {{minNumExecutors}}, otherwise
the parameter {{initialExecutors}} is no meaning.
> Config "spark.dynamicAllocation.initialExecutors" has no effect
> ----------------------------------------------------------------
>
> Key: SPARK-7699
> URL: https://issues.apache.org/jira/browse/SPARK-7699
> Project: Spark
> Issue Type: Bug
> Components: Spark Core
> Reporter: meiyoula
>
> spark.dynamicAllocation.minExecutors 2
> spark.dynamicAllocation.initialExecutors 3
> spark.dynamicAllocation.maxExecutors 4
> Just run the spark-shell with above configurations, the initial executor
> number is 2.
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