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SPARK-1171: when executor is removed, we should minus totalCores instead of just freeCores on that executor #63

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SPARK-1171: when executor is removed, we should minus totalCores instead of just freeCores on that executor #63

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0c0e409
simplify the implementation of CoarseGrainedSchedulerBackend
CodingCat Mar 3, 2014
af470d3
style fix
CodingCat Mar 3, 2014
43c13e9
keep WorkerOffer immutable
CodingCat Mar 4, 2014
19c2bb4
use copy idiom to reconstruct the workerOffers
CodingCat Mar 4, 2014
f6bf93f
code clean
CodingCat Mar 4, 2014
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code clean
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@CodingCat
CodingCat committed Mar 4, 2014
commit f6bf93f425ce71f8d73805a6106f433fc1db15ef
2 changes: 1 addition & 1 deletion core/src/main/scala/org/apache/spark/scheduler/WorkerOffer.scala
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Expand Up @@ -21,4 +21,4 @@ package org.apache.spark.scheduler
* Represents free resources available on an executor.
*/
private[spark]
case class WorkerOffer(executorId: String, host: String, cores: Int);
case class WorkerOffer(executorId: String, host: String, cores: Int)
27 changes: 13 additions & 14 deletions core/src/main/scala/org/apache/spark/scheduler/cluster/CoarseGrainedSchedulerBackend.scala
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Expand Up @@ -51,7 +51,8 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A

class DriverActor(sparkProperties: Seq[(String, String)]) extends Actor {
private val executorActor = new HashMap[String, ActorRef]
private val workerOffers = new HashMap[String, WorkerOffer]
private val executorAddress = new HashMap[String, Address]
private val executorHost = new HashMap[String, String]
private val freeCores = new HashMap[String, Int]
private val totalCores = new HashMap[String, Int]
private val addressToExecutorId = new HashMap[Address, String]
Expand All @@ -75,10 +76,10 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A
logInfo("Registered executor: " + sender + " with ID " + executorId)
sender ! RegisteredExecutor(sparkProperties)
executorActor(executorId) = sender
workerOffers += (executorId ->
new WorkerOffer(executorId, Utils.parseHostPort(hostPort)._1, cores))
totalCores += (executorId -> cores)
freeCores += (executorId -> cores)
executorHost(executorId) = Utils.parseHostPort(hostPort)._1
totalCores(executorId) = cores
freeCores(executorId) = cores
executorAddress(executorId) = sender.path.address
addressToExecutorId(sender.path.address) = executorId
totalCoreCount.addAndGet(cores)
makeOffers()
Expand Down Expand Up @@ -126,18 +127,14 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A

// Make fake resource offers on all executors
def makeOffers() {
// reconstruct workerOffers
workerOffers.keys.foreach { executorId =>
workerOffers(executorId) = workerOffers(executorId).copy(cores = freeCores(executorId))
}
launchTasks(scheduler.resourceOffers(workerOffers.values.toSeq))
launchTasks(scheduler.resourceOffers(
executorHost.toArray.map {case (id, host) => new WorkerOffer(id, host, freeCores(id))}))
}

// Make fake resource offers on just one executor
def makeOffers(executorId: String) {
// update the workerOffer
workerOffers(executorId) = workerOffers(executorId).copy(cores = freeCores(executorId))
launchTasks(scheduler.resourceOffers(Seq(workerOffers(executorId))))
launchTasks(scheduler.resourceOffers(
Seq(new WorkerOffer(executorId, executorHost(executorId), freeCores(executorId)))))
}

// Launch tasks returned by a set of resource offers
Expand All @@ -154,7 +151,9 @@ class CoarseGrainedSchedulerBackend(scheduler: TaskSchedulerImpl, actorSystem: A
logInfo("Executor " + executorId + " disconnected, so removing it")
val numCores = totalCores(executorId)
executorActor -= executorId
workerOffers -= executorId
executorHost -= executorId
addressToExecutorId -= executorAddress(executorId)
executorAddress -= executorId
totalCores -= executorId
freeCores -= executorId
totalCoreCount.addAndGet(-numCores)
Expand Down