liutang123 commented on a change in pull request #24131: [SPARK-27192][Core]
spark.task.cpus should be less or equal than spark.executor.cores
URL: https://github.com/apache/spark/pull/24131#discussion_r268085581
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File path: core/src/main/scala/org/apache/spark/SparkContext.scala
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@@ -2665,8 +2665,25 @@ object SparkContext extends Logging {
// When running locally, don't try to re-execute tasks on failure.
val MAX_LOCAL_TASK_FAILURES = 1
+ // SPARK-26340: Ensure that executor's core num meets at least one task
requirement.
+ def checkCpusPerTask(
+ executorCoreNum: Int = sc.conf.get(EXECUTOR_CORES),
+ clusterMode: Boolean = true): Unit = {
+ val cpusPerTask = sc.conf.get(CPUS_PER_TASK)
+ if (executorCoreNum < cpusPerTask) {
+ val message = if (clusterMode) {
Review comment:
`executorCoreNum` is decided by `local[N]` or `--conf
spark.executor.cores=M`, I think we should info this in exception.
And, if user both sets `--master local[N]` and `--conf
spark.executor.cores=M`, I think we should ignore the latter.
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