Github user drcrallen commented on a diff in the pull request: https://github.com/apache/spark/pull/11157#discussion_r69344006 --- Diff: core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala --- @@ -356,4 +374,233 @@ private[mesos] trait MesosSchedulerUtils extends Logging { sc.conf.getTimeAsSeconds("spark.mesos.rejectOfferDurationForReachedMaxCores", "120s") } + /** + * Checks executor ports if they are within some range of the offered list of ports ranges, + * + * @param sc the Spark Context + * @param ports the list of ports to check + * @return true if ports are within range false otherwise + */ + protected def checkPorts(sc: SparkContext, 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 = ManagedPorts.getPortValues(sc.conf) + val nonZeroPorts = portsToCheck.filter(_ != 0) + val withinRange = nonZeroPorts.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 conf the spark config + * @param ports the ports offered + * @return resources left, port resources to be used and the list of assigned ports + */ + def partitionPorts( + conf: SparkConf, + ports: List[Resource]) + : (List[Resource], List[Resource], List[Long]) = { + val taskPortRanges = getRangeResourceWithRoleInfo(ports.asJava, "ports") + val portsToCheck = ManagedPorts.getPortValues(conf) + val nonZeroPorts = portsToCheck.filter(_ != 0) + // reserve non zero ports first + val nonZeroResources = reservePorts(taskPortRanges, nonZeroPorts) + // reserve actual port numbers for zero ports - not set by the user + val numOfZeroPorts = portsToCheck.count(_ == 0) + val randPorts = pickRandomPortsFromRanges(nonZeroResources._1, numOfZeroPorts) + val zeroResources = reservePorts(nonZeroResources._1, randPorts) + val (portResourcesLeft, portResourcesToBeUsed) = + createResources(nonZeroResources, zeroResources) + (portResourcesLeft, portResourcesToBeUsed, nonZeroPorts ++ randPorts) + } + + private object ManagedPorts { + val portNames = List("spark.executor.port", "spark.blockManager.port") --- End diff -- this is buried way down here and will be nearly impossible to keep current.
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