[SPARK-15322][MLLIB][CORE][SQL] update deprecate accumulator usage into accumulatorV2 in spark project

## What changes were proposed in this pull request?

I use Intellj-IDEA to search usage of deprecate SparkContext.accumulator in the whole spark project, and update the code.(except those test code for accumulator method itself)

## How was this patch tested?

Exisiting unit tests

Author: WeichenXu <WeichenXu123@outlook.com>

Closes #13112 from WeichenXu123/update_accuV2_in_mllib.

3 files changed, 10 insertions, 9 deletions

diff --git a/mllib/src/main/scala/org/apache/spark/ml/util/stopwatches.scala b/mllib/src/main/scala/org/apache/spark/ml/util/stopwatches.scala
index 8d4174124b..e79b1f3164 100644
--- a/mllib/src/main/scala/org/apache/spark/ml/util/stopwatches.scala
+++ b/mllib/src/main/scala/org/apache/spark/ml/util/stopwatches.scala
@@ -19,7 +19,8 @@ package org.apache.spark.ml.util
 
 import scala.collection.mutable
 
-import org.apache.spark.{Accumulator, SparkContext}
+import org.apache.spark.SparkContext
+import org.apache.spark.util.LongAccumulator;
 
 /**
  * Abstract class for stopwatches.
@@ -102,12 +103,12 @@ private[spark] class DistributedStopwatch(
     sc: SparkContext,
     override val name: String) extends Stopwatch {
 
-  private val elapsedTime: Accumulator[Long] = sc.accumulator(0L, s"DistributedStopwatch($name)")
+  private val elapsedTime: LongAccumulator = sc.longAccumulator(s"DistributedStopwatch($name)")
 
   override def elapsed(): Long = elapsedTime.value
 
   override protected def add(duration: Long): Unit = {
-    elapsedTime += duration
+    elapsedTime.add(duration)
   }
 }
 
diff --git a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
index 60f13d27d0..38728f2693 100644
--- a/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
+++ b/mllib/src/main/scala/org/apache/spark/mllib/clustering/KMeans.scala
@@ -279,7 +279,7 @@ class KMeans private (
       }
 
       val activeCenters = activeRuns.map(r => centers(r)).toArray
-      val costAccums = activeRuns.map(_ => sc.accumulator(0.0))
+      val costAccums = activeRuns.map(_ => sc.doubleAccumulator)
 
       val bcActiveCenters = sc.broadcast(activeCenters)
 
@@ -296,7 +296,7 @@ class KMeans private (
         points.foreach { point =>
           (0 until runs).foreach { i =>
             val (bestCenter, cost) = KMeans.findClosest(thisActiveCenters(i), point)
-            costAccums(i) += cost
+            costAccums(i).add(cost)
             val sum = sums(i)(bestCenter)
             axpy(1.0, point.vector, sum)
             counts(i)(bestCenter) += 1
diff --git a/mllib/src/test/scala/org/apache/spark/ml/util/StopwatchSuite.scala b/mllib/src/test/scala/org/apache/spark/ml/util/StopwatchSuite.scala
index 9e6bc7193c..141249a427 100644
--- a/mllib/src/test/scala/org/apache/spark/ml/util/StopwatchSuite.scala
+++ b/mllib/src/test/scala/org/apache/spark/ml/util/StopwatchSuite.scala
@@ -60,9 +60,9 @@ class StopwatchSuite extends SparkFunSuite with MLlibTestSparkContext {
   test("DistributedStopwatch on executors") {
     val sw = new DistributedStopwatch(sc, "sw")
     val rdd = sc.parallelize(0 until 4, 4)
-    val acc = sc.accumulator(0L)
+    val acc = sc.longAccumulator
     rdd.foreach { i =>
-      acc += checkStopwatch(sw)
+      acc.add(checkStopwatch(sw))
     }
     assert(!sw.isRunning)
     val elapsed = sw.elapsed()
@@ -88,12 +88,12 @@ class StopwatchSuite extends SparkFunSuite with MLlibTestSparkContext {
     assert(sw.toString ===
       s"{\n  local: ${localElapsed}ms,\n  spark: ${sparkElapsed}ms\n}")
     val rdd = sc.parallelize(0 until 4, 4)
-    val acc = sc.accumulator(0L)
+    val acc = sc.longAccumulator
     rdd.foreach { i =>
       sw("local").start()
       val duration = checkStopwatch(sw("spark"))
       sw("local").stop()
-      acc += duration
+      acc.add(duration)
     }
     val localElapsed2 = sw("local").elapsed()
     assert(localElapsed2 === localElapsed)