Github user tgravescs commented on a diff in the pull request:
https://github.com/apache/spark/pull/15009#discussion_r100318547
--- Diff:
launcher/src/main/java/org/apache/spark/launcher/package-info.java ---
@@ -49,6 +49,38 @@
* </pre>
*
* <p>
+ * Currently, for currently while launching spark application with
+ * {@link org.apache.spark.launcher.SparkLauncher#startApplication(
+ * org.apache.spark.launcher.SparkAppHandle.Listener...)}, there are two
options available
+ * for YARN manager in cluster deploy mode:
+ * - to launch Spark Application as a Thread inside current JVM using
+ * the {@link
org.apache.spark.launcher.SparkLauncher#launchAsThread(boolean)}
+ * - to request application be killed if launcher process exits using
+ * the {@link
org.apache.spark.launcher.SparkLauncher#stopIfLauncherShutdown()}.
+ * </p>
+ *
+ * <pre>
+ * {@code
+ * import org.apache.spark.launcher.SparkAppHandle;
+ * import org.apache.spark.launcher.SparkLauncher;`
+ *
+ * public class MyLauncher {
+ * public static void main(String[] args) throws Exception {
+ * SparkAppHandle handle = new SparkLauncher()
+ * .setAppResource("/my/app.jar")
+ * .setMainClass("my.spark.app.Main")
+ * .setMaster("yarn")
--- End diff --
we should explicilty set setDeployMode to cluster here.
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