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https://issues.apache.org/jira/browse/SPARK-2289?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14044643#comment-14044643
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Thomas Graves commented on SPARK-2289:
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https://github.com/apache/spark/pull/1214
> Remove use of spark.worker.instances
> ------------------------------------
>
> Key: SPARK-2289
> URL: https://issues.apache.org/jira/browse/SPARK-2289
> Project: Spark
> Issue Type: Bug
> Components: YARN
> Affects Versions: 1.0.0
> Reporter: Thomas Graves
> Assignee: Kay Ousterhout
> Fix For: 1.0.1, 1.1.0
>
>
> spark.worker.instances was added as part of this commit: 1617816
> My understanding is that SPARK_WORKER_INSTANCES is supported for backwards
> compatibility,
> but spark.worker.instances is never used (SparkSubmit.scala sets
> spark.executor.instances) so should
> not have been added.
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