Github user WangTaoTheTonic commented on a diff in the pull request: https://github.com/apache/spark/pull/4129#discussion_r23299757 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/CoarseMesosSchedulerBackend.scala --- @@ -87,7 +89,12 @@ private[spark] class CoarseMesosSchedulerBackend( override def start() { super.start() - + + if (coreNumPerTask < 1) { + throw new IllegalArgumentException( + s"spark.task.cpus is set to an invalid value $coreNumPerTask") + } --- End diff -- Should we put the `if` statement together with its initialization?
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