Merge pull request #148 from squito/include_appId

Include appId in executor cmd line args

add the appId back into the executor cmd line args.

I also made a pretty lame regression test, just to make sure it doesn't get dropped in the future.  not sure it will run on the build server, though, b/c `ExecutorRunner.buildCommandSeq()` expects to be abel to run the scripts in `bin`.

core/src/main/scala/org/apache/spark/deploy/worker/ExecutorRunner.scala

@@ -104,7 +104,7 @@ private[spark] class ExecutorRunner(
     // SPARK-698: do not call the run.cmd script, as process.destroy()
     // fails to kill a process tree on Windows
     Seq(runner) ++ buildJavaOpts() ++ Seq(command.mainClass) ++
-      command.arguments.map(substituteVariables)
+      (command.arguments ++ Seq(appId)).map(substituteVariables)
   }
 
   /**

core/src/main/scala/org/apache/spark/executor/CoarseGrainedExecutorBackend.scala

@@ -111,7 +111,7 @@ private[spark] object CoarseGrainedExecutorBackend {
 
   def main(args: Array[String]) {
     if (args.length < 4) {
-      //the reason we allow the last frameworkId argument is to make it easy to kill rogue executors
+      //the reason we allow the last appid argument is to make it easy to kill rogue executors
       System.err.println(
         "Usage: CoarseGrainedExecutorBackend <driverUrl> <executorId> <hostname> <cores> " +
         "[<appid>]")

core/src/test/scala/org/apache/spark/deploy/worker/ExecutorRunnerTest.scala

+package org.apache.spark.deploy.worker
+
+import java.io.File
+import org.scalatest.FunSuite
+import org.apache.spark.deploy.{ExecutorState, Command, ApplicationDescription}
+
+class ExecutorRunnerTest extends FunSuite {
+
+  test("command includes appId") {
+    def f(s:String) = new File(s)
+    val sparkHome = sys.props("user.dir")
+    val appDesc = new ApplicationDescription("app name", 8, 500, Command("foo", Seq(),Map()),
+      sparkHome, "appUiUrl")
+    val appId = "12345-worker321-9876"
+    val er = new ExecutorRunner(appId, 1, appDesc, 8, 500, null, "blah", "worker321", f(sparkHome),
+      f("ooga"), ExecutorState.RUNNING)
+
+    assert(er.buildCommandSeq().last === appId)
+  }
+}