liutang123 edited a comment on issue #24131: [SPARK-27192][Core] spark.task.cpus should be less or equal than spark.executor.cores URL: https://github.com/apache/spark/pull/24131#issuecomment-475132217 @jiangxb1987 Thanks for review. Sorry I didn't noticed the checking logic in `SparkConf`, but I think the checking logic is incomplete for local mode. For example: case 1: ``` $SPARK_HOME/bin/spark-shell --master local[3] --conf spark.task.cpus=2 --conf spark.executor.cores=1 ``` `local[3]` decides executor's core num is 3, but in #23290's logic, exception will be thrown. case 2: ``` $SPARK_HOME/bin/spark-shell --master local --conf spark.task.cpus=2 --conf spark.executor.cores=3 scala>sc.setLogLevel("INFO") scala>sc.parallelize(1 to 9).collect ``` You can see spark will hang after log `INFO TaskSchedulerImpl: Adding task set 0.0 with 1 tasks.` but the checking logic in #23290 can not identify this case. So, I think we can check the spark.task.cpus before creating TaskScheduler.
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