<pre class="lang-scala prettyprint-override"><code>package learn.spark

import org.apache.spark.{SparkConf, SparkContext}

object MasterLocal2 {
  def main(args: Array[String]): Unit = {

    val conf = new SparkConf()

    conf.setAppName("spark-k8s")
    conf.setMaster("k8s://https://192.168.99.100:16443")

    conf.set("spark.driver.host", "192.168.99.1")
    conf.set("spark.executor.instances", "5")
    conf.set("spark.kubernetes.executor.request.cores", "0.1")
    conf.set("spark.kubernetes.container.image", "spark:latest")

    val sc = new SparkContext(conf)

    println(sc.parallelize(1 to 5).map(_ * 10).collect().mkString(", "))

    sc.stop()
  }
}
</code></pre>

<p>I am trying to speed up the local running of the Spark program, but I got some exceptions. I don't know how to configure to pass the JVM things to the executors.</p>

<pre class="lang-php prettyprint-override"><code>Exception in thread "main" org.apache.spark.SparkException: Job aborted due to stage failure: Task 1 in stage 0.0 failed 4 times, most recent failure: Lost task 1.3 in stage 0.0 (TID 8, 10.1.1.217, executor 4): java.lang.ClassNotFoundException: learn.spark.MasterLocal2$$anonfun$main$1
    at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at java.lang.Class.forName0(Native Method)
    at java.lang.Class.forName(Class.java:348)
</code></pre>

Time Killer
<p>Mount the Idea compilation result directory to the executor, then set <code>spark.executor.extraClassPath</code> to that.</p>

<pre class="lang-scala prettyprint-override"><code>conf.set("spark.kubernetes.executor.volumes.hostPath.anyname.options.path", "/path/to/your/project/out/production/examples")
conf.set("spark.kubernetes.executor.volumes.hostPath.anyname.mount.path", "/intellij-idea-build-out")
conf.set("spark.executor.extraClassPath", "/intellij-idea-build-out")
</code></pre>

<p>Make sure that your compilation out directory can be mounted to the executor container via <a href="https://kubernetes.io/docs/concepts/storage/volumes" rel="nofollow noreferrer">K8S volume</a>, which involves the use of Kubernetes.</p>
