Github user mgummelt commented on a diff in the pull request: https://github.com/apache/spark/pull/11157#discussion_r74156824 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala --- @@ -358,6 +376,119 @@ private[mesos] trait MesosSchedulerUtils extends Logging { } /** + * Checks executor ports if they are within some range of the offered list of ports ranges, + * + * @param conf the Spark Config + * @param ports the list of ports to check + * @return true if ports are within range false otherwise + */ + protected def checkPorts(conf: SparkConf, ports: List[(Long, Long)]): Boolean = { + + def checkIfInRange(port: Long, ps: List[(Long, Long)]): Boolean = { + ps.exists(r => r._1 <= port & r._2 >= port) + } + + val portsToCheck = nonZeroPortValuesFromConfig(conf) + val withinRange = portsToCheck.forall(p => checkIfInRange(p, ports)) + // make sure we have enough ports to allocate per offer + ports.map(r => r._2 - r._1 + 1).sum >= portsToCheck.size && withinRange + } + + /** + * Partitions port resources. + * + * @param requestedPorts non-zero ports to assign + * @param offeredResources the resources offered + * @return resources left, port resources to be used. + */ + def partitionPortResources(requestedPorts: List[Long], offeredResources: List[Resource]) + : (List[Resource], List[Resource]) = { + if (requestedPorts.isEmpty) { --- End diff -- Saving a few cycles is not worth the added complexity of special casing. Please remove this.
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