Github user tnachen commented on a diff in the pull request:
https://github.com/apache/spark/pull/11157#discussion_r60254568
--- Diff:
core/src/main/scala/org/apache/spark/scheduler/cluster/mesos/MesosSchedulerUtils.scala
---
@@ -353,4 +371,247 @@ private[mesos] trait MesosSchedulerUtils extends
Logging {
sc.conf.getTimeAsSeconds("spark.mesos.rejectOfferDurationForUnmetConstraints",
"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
+ * @param takenPorts ports already used for that slave
+ * @return true if ports are within range false otherwise
+ */
+ protected def checkPorts(sc: SparkContext, ports: List[(Long, Long)],
+ takenPorts: List[Long] = List()): Boolean = {
+
+ def checkIfInRange(port: Int, ps: List[(Long, Long)]): Boolean = {
+ ps.exists(r => r._1 <= port & r._2 >= port)
+ }
+
+ val portsToCheck = List(sc.conf.getInt("spark.executor.port", 0),
+ sc.conf.getInt("spark.blockManager.port", 0))
+ val nonZeroPorts = portsToCheck.filter(_ != 0)
+
+ // If we require a port that is taken we have to decline the offer
since mesos
+ // shares all port ranges on the slave
+ val contained = for {port <- nonZeroPorts}
+ yield {
+ takenPorts.contains(port)
+ }
+
+ if (contained.contains(true)) {
+ return false
+ }
+
+ 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 = List(conf.getInt("spark.executor.port", 0).toLong,
+ conf.getInt("spark.blockManager.port", 0).toLong)
+
+ 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 (resourcesLeft, resourcesToBeUsed) =
createResources(nonZeroResources, zeroResources)
+
+ (resourcesLeft, resourcesToBeUsed, nonZeroPorts ++ randPorts)
+ }
+
+ private def createResources(
+ nonZero: (List[PortRangeResourceInfo], List[PortRangeResourceInfo]),
+ zero: (List[PortRangeResourceInfo], List[PortRangeResourceInfo]))
+ : (List[Resource], List[Resource]) = {
+
+ val resources = {
+ if (nonZero._2.isEmpty) { // no user ports were defined
+ (zero._1.flatMap{port => createMesosPortResource(port.value,
Some(port.role))},
+ zero._2.flatMap{port => createMesosPortResource(port.value,
Some(port.role))})
+
+ } else if (zero._2.isEmpty) { // no random ports were defined
+ (nonZero._1.flatMap{port => createMesosPortResource(port.value,
Some(port.role))},
+ nonZero._2.flatMap{port => createMesosPortResource(port.value,
Some(port.role))})
+ }
+ else { // we have user defined and random ports defined
+ val left = zero._1.flatMap{port =>
createMesosPortResource(port.value, Some(port.role))}
+
+ val used = nonZero._2.flatMap{port =>
+ createMesosPortResource(port.value, Some(port.role))} ++
+ zero._2.flatMap{port => createMesosPortResource(port.value,
Some(port.role))}
+
+ (left, used)
+ }
+ }
+ resources
+ }
+
+ private case class PortRangeResourceInfo(role: String, value:
List[(Long, Long)])
+
+ private def getRangeResourceWithRoleInfo(res: JList[Resource], name:
String)
+ : List[PortRangeResourceInfo] = {
+ // A resource can have multiple values in the offer since it can
either be from
+ // a specific role or wildcard.
+ res.asScala.filter(_.getName == name)
+ .map{res => PortRangeResourceInfo(res.getRole,
res.getRanges.getRangeList.asScala
+ .map(r => (r.getBegin, r.getEnd)).toList) }.toList
+ }
+
+ private def reservePorts(
--- End diff --
Can you specify what the return tuple means here?
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