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https://issues.apache.org/jira/browse/SPARK-9092?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14638689#comment-14638689
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Sean Owen commented on SPARK-9092:
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I tend to agree with [~sandyr] for these reasons. The issue here indeed is
exactly that the user wants to override a sensible cluster default.
[~niranjanvp] would you like to try a PR?
> Make --num-executors compatible with dynamic allocation
> -------------------------------------------------------
>
> Key: SPARK-9092
> URL: https://issues.apache.org/jira/browse/SPARK-9092
> Project: Spark
> Issue Type: Improvement
> Components: YARN
> Affects Versions: 1.2.0
> Reporter: Niranjan Padmanabhan
>
> Currently when you enable dynamic allocation, you can't use --num-executors
> or the property spark.executor.instances. If we are to enable dynamic
> allocation by default, we should make these work so that existing workloads
> don't fail
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