[jira] [Created] (SPARK-30561) start spark applications without a 30second startup penalty

["t oo (Jira)" <ji...@apache.org>]

t oo created SPARK-30561:
----------------------------

             Summary: start spark applications without a 30second startup penalty
                 Key: SPARK-30561
                 URL: https://issues.apache.org/jira/browse/SPARK-30561
             Project: Spark
          Issue Type: Improvement
          Components: Spark Core
    Affects Versions: 2.4.4
            Reporter: t oo


see https://stackoverflow.com/questions/57610138/how-to-start-spark-applications-without-a-30second-startup-penalty

using spark standalone.

There are several sleeps that can be removed:

grep -i 'sleep(' -R * | grep -v 'src/test/' | grep -E '^core' | grep -ivE 'mesos|yarn|python|HistoryServer|spark/ui/'
core/src/main/scala/org/apache/spark/util/Clock.scala:      Thread.sleep(sleepTime)
core/src/main/scala/org/apache/spark/SparkContext.scala:   * sc.parallelize(1 to 10000, 2).map { i => Thread.sleep(10); i }.count()
core/src/main/scala/org/apache/spark/deploy/FaultToleranceTest.scala:  private def delay(secs: Duration = 5.seconds) = Thread.sleep(secs.toMillis)
core/src/main/scala/org/apache/spark/deploy/FaultToleranceTest.scala:          Thread.sleep(1000)
core/src/main/scala/org/apache/spark/deploy/Client.scala:    Thread.sleep(5000)
core/src/main/scala/org/apache/spark/deploy/master/ui/MasterPage.scala:      Thread.sleep(100)
core/src/main/scala/org/apache/spark/deploy/StandaloneResourceUtils.scala:          Thread.sleep(duration)
core/src/main/scala/org/apache/spark/deploy/worker/DriverRunner.scala:    def sleep(seconds: Int): Unit = (0 until seconds).takeWhile { _ =>
core/src/main/scala/org/apache/spark/deploy/worker/DriverRunner.scala:      Thread.sleep(1000)
core/src/main/scala/org/apache/spark/deploy/worker/DriverRunner.scala:        sleeper.sleep(waitSeconds)
core/src/main/scala/org/apache/spark/deploy/worker/DriverRunner.scala:  def sleep(seconds: Int): Unit
core/src/main/scala/org/apache/spark/deploy/rest/RestSubmissionClient.scala:      Thread.sleep(REPORT_DRIVER_STATUS_INTERVAL)
core/src/main/scala/org/apache/spark/scheduler/AsyncEventQueue.scala:      Thread.sleep(10)
core/src/main/scala/org/apache/spark/storage/BlockManager.scala:          Thread.sleep(SLEEP_TIME_SECS * 1000L)




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