meiyoula created SPARK-8099:
-------------------------------

             Summary: In yarn-cluster mode, "--executor-cores" can't be setted 
into SparkConf
                 Key: SPARK-8099
                 URL: https://issues.apache.org/jira/browse/SPARK-8099
             Project: Spark
          Issue Type: Bug
          Components: YARN
            Reporter: meiyoula


While testing dynamic executor allocation function, I set the executor cores 
with `--executor-cores 4` in spark-submit command. But in 
`ExecutorAllocationManager`, the ` private val tasksPerExecutor 
=conf.getInt("spark.executor.cores", 1) / conf.getInt("spark.task.cpus", 1)` is 
still to be 1.



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