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From skonto <...@git.apache.org>
Subject [GitHub] spark pull request #11157: [SPARK-11714][Mesos] Make Spark on Mesos honor po...
Date Mon, 04 Jul 2016 12:54:11 GMT
Github user skonto commented on a diff in the pull request:

    https://github.com/apache/spark/pull/11157#discussion_r69453652
  
    --- 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")
    +
    +    def getPortValues(conf: SparkConf): List[Long] = {
    +      portNames.map(conf.getLong(_, 0))
    +    }
    +  }
    +
    +  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.range, Some(port.role))},
    +          zero._2.flatMap{port => createMesosPortResource(port.range, Some(port.role))})
    +
    +      } else if (zero._2.isEmpty) { // no random ports were defined
    +        (nonZero._1.flatMap{port => createMesosPortResource(port.range, Some(port.role))},
    +          nonZero._2.flatMap{port => createMesosPortResource(port.range, Some(port.role))})
    +      }
    +      else {  // we have user defined and random ports defined
    +        val left = zero._1.flatMap{port => createMesosPortResource(port.range, Some(port.role))}
    +        val used = nonZero._2.flatMap{port =>
    +          createMesosPortResource(port.range, Some(port.role))} ++
    +          zero._2.flatMap{port => createMesosPortResource(port.range, Some(port.role))}
    +        (left, used)
    +      }
    +    }
    +    resources
    +  }
    +
    +  private case class PortRangeResourceInfo(role: String, range: 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.
    +    // Extract role info and port range for every port resource in the offer
    +    res.asScala.filter(_.getName == name)
    +      .map{res => PortRangeResourceInfo(res.getRole, res.getRanges.getRangeList.asScala
    +        .map(r => (r.getBegin, r.getEnd)).toList) }.toList
    +  }
    +
    +  /** Helper method to get a pair of assigned and remaining ports along with role info
*/
    +  private def reservePorts(
    +      availablePortRanges: List[PortRangeResourceInfo],
    +      wantedPorts: List[Long])
    --- End diff --
    
    done


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