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Hardening AdaptiveLoadBalancingRouterSpec, see #2547

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* Problems with OOME for large heaps
* Create many small arrays instead of one large array
* Reduce half-life to get faster updates
This commit is contained in:
Patrik Nordwall 2012-11-23 11:22:01 +01:00
parent c57f84fd28
commit cba535c9b7
1 changed files with 16 additions and 11 deletions
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25
akka-cluster/src/multi-jvm/scala/akka/cluster/routing/AdaptiveLoadBalancingRouterSpec.scala
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@ -8,7 +8,6 @@ import language.postfixOps
import java.lang.management.ManagementFactory
import scala.concurrent.Await
import scala.concurrent.duration._
import scala.concurrent.forkjoin.ThreadLocalRandom
import com.typesafe.config.Config
import com.typesafe.config.ConfigFactory
@ -26,22 +25,26 @@ import akka.testkit.{ LongRunningTest, DefaultTimeout, ImplicitSender }
object AdaptiveLoadBalancingRouterMultiJvmSpec extends MultiNodeConfig {
class Routee extends Actor {
var usedMemory: Array[Byte] = _
def receive = {
case _ ⇒ sender ! Reply(Cluster(context.system).selfAddress)
}
}
class Memory extends Actor with ActorLogging {
var usedMemory: Array[Byte] = _
var usedMemory: Array[Array[Int]] = _
def receive = {
case AllocateMemory ⇒
val heap = ManagementFactory.getMemoryMXBean.getHeapMemoryUsage
// getMax can be undefined (-1)
val max = math.max(heap.getMax, heap.getCommitted)
val used = heap.getUsed
val allocate = (0.8 * (max - used)).toInt
usedMemory = Array.fill(allocate)(ThreadLocalRandom.current.nextInt(127).toByte)
log.debug("used heap before: [{}] bytes, of max [{}]", used, heap.getMax)
// allocate 70% of free space
val allocateBytes = (0.7 * (max - used)).toInt
val numberOfArrays = allocateBytes / 1024
usedMemory = Array.ofDim(numberOfArrays, 248) // each 248 element Int array will use ~ 1 kB
log.debug("used heap after: [{}] bytes", ManagementFactory.getMemoryMXBean.getHeapMemoryUsage.getUsed)
sender ! "done"
}
}
@ -55,6 +58,7 @@ object AdaptiveLoadBalancingRouterMultiJvmSpec extends MultiNodeConfig {
commonConfig(debugConfig(on = false).withFallback(ConfigFactory.parseString("""
akka.cluster.metrics.collect-interval = 1s
akka.cluster.metrics.gossip-interval = 1s
akka.cluster.metrics.moving-average-half-life = 2s
akka.actor.deployment {
/router3 = {
router = adaptive
@ -157,7 +161,10 @@ abstract class AdaptiveLoadBalancingRouterSpec extends MultiNodeSpec(AdaptiveLoa
enterBarrier("gc")
runOn(second) {
within(20.seconds) {
system.actorOf(Props[Memory], "memory") ! AllocateMemory
expectMsg("done")
}
}
enterBarrier("heap-allocated")
@ -166,13 +173,11 @@ abstract class AdaptiveLoadBalancingRouterSpec extends MultiNodeSpec(AdaptiveLoa
router2
// collect some metrics before we start
Thread.sleep(10000)
Thread.sleep(cluster.settings.MetricsInterval.toMillis * 10)
val iterationCount = 100
for (i ← 0 until iterationCount) {
val iterationCount = 3000
1 to iterationCount foreach { _ ⇒
router2 ! "hit"
// wait a while between each message, since metrics is collected periodically
Thread.sleep(10)
}
val replies = receiveReplies(iterationCount)