Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/15009#discussion_r84785866
--- Diff:
core/src/main/scala/org/apache/spark/launcher/LauncherBackend.scala ---
@@ -17,38 +17,71 @@
package org.apache.spark.launcher
+import java.io.IOException
import java.net.{InetAddress, Socket}
import org.apache.spark.SPARK_VERSION
+import org.apache.spark.internal.Logging
import org.apache.spark.launcher.LauncherProtocol._
-import org.apache.spark.util.{ThreadUtils, Utils}
+import org.apache.spark.util.{ShutdownHookManager, ThreadUtils, Utils}
/**
* A class that can be used to talk to a launcher server. Users should
extend this class to
* provide implementation for the abstract methods.
*
* See `LauncherServer` for an explanation of how launcher communication
works.
*/
-private[spark] abstract class LauncherBackend {
+private[spark] abstract class LauncherBackend extends Logging {
private var clientThread: Thread = _
private var connection: BackendConnection = _
private var lastState: SparkAppHandle.State = _
+ private var stopFlag: Boolean = false
--- End diff --
nit: type is not necessary. Also, not a big fan of the name of this
variable, it should be more descriptive. Like `stopOnShutdown`.
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