Removed useless statement in JsonProtocol.scala

Author: sarutak

core/src/main/scala/org/apache/spark/util/JsonProtocol.scala

@@ -25,6 +25,8 @@ import scala.collection.Map
 import org.json4s.DefaultFormats
 import org.json4s.JsonDSL._
 import org.json4s.JsonAST._
+
+// Don't remove. It may seem this statement is useless but this is need to parse with Jackson
 import org.json4s.jackson.JsonMethods._
 
 
@@ -217,7 +219,7 @@ private[spark] object JsonProtocol {
     ("Getting Result Time" -> taskInfo.gettingResultTime) ~
     ("Finish Time" -> taskInfo.finishTime) ~
     ("Failed" -> taskInfo.failed) ~
-    ("Accumulables" -> JArray(taskInfo.accumulables.map(accumulableInfoToJson).toList))
+    ("Accumulables" -> JArray(accumUpdateMap.map(accumulableInfoToJson).toList))
   }
 
   def accumulableInfoToJson(accumulableInfo: AccumulableInfo): JValue = {