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From mwws <...@git.apache.org>
Subject [GitHub] spark pull request: [Spark-8426] [scheduler] enhance blacklist mec...
Date Fri, 16 Oct 2015 07:30:15 GMT
Github user mwws commented on a diff in the pull request:

    https://github.com/apache/spark/pull/8760#discussion_r42215540
  
    --- Diff: core/src/test/scala/org/apache/spark/scheduler/BlacklistTrackerSuite.scala ---
    @@ -0,0 +1,162 @@
    +package org.apache.spark.scheduler
    +
    +import org.apache.spark.SparkFunSuite
    +import org.scalatest.BeforeAndAfter
    +import org.apache.spark.SparkConf
    +import org.apache.spark.TaskEndReason
    +import org.apache.spark.Success
    +import org.apache.spark.ExceptionFailure
    +import org.apache.spark.LocalSparkContext
    +import org.apache.spark.SparkContext
    +
    +import org.mockito.Mockito.{when,spy}
    +
    +class BlacklistTrackerSuite extends SparkFunSuite with BeforeAndAfter with LocalSparkContext
{
    +
    +  val FAILURE: TaskEndReason = new ExceptionFailure(
    +      "Fake",
    +      "fake failure",
    +      Array.empty[StackTraceElement],
    +      "fake stack trace",
    +      None,
    +      None)
    +
    +  // Variable name can indicate basic information of taskInfo
    +  // The format is "taskInfo_executorId_taskId_hostName"
    +  val taskInfo_1_1_hostA = new TaskInfo(1L,1,1,0L,"1","hostA", TaskLocality.ANY, false)
    +  val taskInfo_1_2_hostA = new TaskInfo(2L,1,1,0L,"1","hostA", TaskLocality.ANY, false)
    +  val taskInfo_2_1_hostA = new TaskInfo(1L,1,1,0L,"2","hostA", TaskLocality.ANY, false)
    +  val taskInfo_2_2_hostA = new TaskInfo(2L,1,1,0L,"2","hostA", TaskLocality.ANY, false)
    +  val taskInfo_3_3_hostB = new TaskInfo(3L,1,1,0L,"3","hostB", TaskLocality.ANY, false)
    +
    +  test ("expireExecutorsInBlacklist works ") {
    +    val conf = new SparkConf().setAppName("test").setMaster("local")
    +      .set("spark.ui.enabled","false")
    +      .set("spark.scheduler.blacklist.recoverPeriod", "2")
    +    sc = new SparkContext(conf)
    +    val scheduler = new TaskSchedulerImpl(sc, 1)
    +
    +    val tracker = new BlacklistTracker(conf)
    +    tracker.start()
    +    Thread.sleep(100)
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set("1"))
    +
    +    // sleep 2 second to wait for expireExecutorsInBlackList be triggered
    +    Thread.sleep(2000)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set())
    +
    +    tracker.stop()
    +  }
    +
    +  test("default strategy works as exceptation") {
    +    val conf = new SparkConf().setAppName("test").setMaster("local")
    +      .set("spark.ui.enabled","false")
    +    sc = new SparkContext(conf)
    +    val scheduler = new TaskSchedulerImpl(sc, 1)
    +
    +    val tracker = new BlacklistTracker(conf)
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, FAILURE)
    +    tracker.updateFailureExecutors(taskInfo_2_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set("1","2"))
    +    assert(tracker.executorBlacklist(scheduler, 2L) === Set())
    +
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, Success)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set("2"))
    +    assert(tracker.nodeBlacklist() === Set())
    +
    +    tracker.updateFailureExecutors(taskInfo_3_3_hostB, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 3L) === Set("3"))
    +    assert(tracker.nodeBlacklist() === Set())
    +
    +    tracker.updateFailureExecutors(taskInfo_2_1_hostA, Success)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set())
    +  }
    +  
    +  test ("strict strategy works as exception") {
    +    val conf = new SparkConf().setAppName("test").setMaster("local")
    +      .set("spark.ui.enabled","false")
    +      .set("spark.scheduler.blacklist.strategy", "strict")
    +    sc = new SparkContext(conf)
    +    val scheduler = new TaskSchedulerImpl(sc, 1)
    +
    +    val tracker = new BlacklistTracker(conf)
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set("1"))
    +    tracker.updateFailureExecutors(taskInfo_1_2_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 2L) === Set("1"))
    +    assert(tracker.nodeBlacklist() === Set("hostA"))
    +
    +    tracker.updateFailureExecutors(taskInfo_2_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 2L) === Set("1", "2"))
    +    assert(tracker.nodeBlacklist() === Set("hostA"))
    +
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, Success)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set("1","2"))
    +
    +    tracker.updateFailureExecutors(taskInfo_3_3_hostB, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 3L) === Set("1","2","3"))
    +    assert(tracker.nodeBlacklist() === Set("hostA","hostB"))
    +  }
    +
    +  test ("threshold strategy works as exception") {
    +    val conf = new SparkConf().setAppName("test").setMaster("local")
    +      .set("spark.ui.enabled","false")
    +      .set("spark.scheduler.blacklist.strategy", "threshold")
    +      .set("spark.scheduler.blacklist.threshold.maxFailureTaskNumber", "1")
    +      .set("spark.scheduler.blacklist.threshold.maxBlackExecutorNumber", "0")
    +    sc = new SparkContext(conf)
    +    val scheduler = new TaskSchedulerImpl(sc, 1)
    +
    +    val tracker = new BlacklistTracker(conf)
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set())
    +    tracker.updateFailureExecutors(taskInfo_1_2_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 2L) === Set("1"))
    +    assert(tracker.nodeBlacklist() === Set("hostA"))
    +
    +    tracker.updateFailureExecutors(taskInfo_2_1_hostA, FAILURE)
    +    assert(tracker.executorBlacklist(scheduler, 2L) === Set("1"))
    +    assert(tracker.nodeBlacklist() === Set("hostA"))
    +
    +    tracker.updateFailureExecutors(taskInfo_1_1_hostA, Success)
    +    assert(tracker.executorBlacklist(scheduler, 1L) === Set())
    --- End diff --
    
    Yes, that's the case. And I will add one more check as your suggestation


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