From 4a1d966e26e56fc5d42a828f414b4eca433c3a22 Mon Sep 17 00:00:00 2001
From: "Lian, Cheng" <rhythm.mail@gmail.com>
Date: Fri, 29 Nov 2013 16:02:58 +0800
Subject: [PATCH] More comments

---
 .../main/scala/org/apache/spark/scheduler/DAGScheduler.scala   | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
index 08cf76325b..bc37a70e98 100644
--- a/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
+++ b/core/src/main/scala/org/apache/spark/scheduler/DAGScheduler.scala
@@ -167,6 +167,9 @@ class DAGScheduler(
    */
   def start() {
     eventProcessActor = env.actorSystem.actorOf(Props(new Actor {
+      /**
+       * A handle to the periodical task, used to cancel the task when the actor is stopped.
+       */
       var resubmissionTask: Cancellable = _
 
       override def preStart() {