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https://issues.apache.org/jira/browse/SPARK-809?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14212068#comment-14212068
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Andrew Ash commented on SPARK-809:
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I believe this situation hasn't changed?
Looking a little at the master branch (1.2) the standalone cluster still gets
its {{defaultParallelism}} in {{CoarseGrainedSchedulerBackend}} from the
{{totalCoreCount}} that is incremented/decremented as executors join/leave the
driver's awareness.
> Give newly registered apps a set of executors right away
> --------------------------------------------------------
>
> Key: SPARK-809
> URL: https://issues.apache.org/jira/browse/SPARK-809
> Project: Spark
> Issue Type: New Feature
> Components: Deploy
> Reporter: Matei Zaharia
> Priority: Minor
>
> Right now, newly connected apps in the standalone cluster will not set a good
> defaultParallelism value if they create RDDs right after creating a
> SparkContext, because the executorAdded calls are asynchronous and happen
> after. It would be nice to wait for a few such calls before returning from
> the scheduler initializer.
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