diff --git a/core/src/main/scala/org/apache/spark/SparkConf.scala b/core/src/main/scala/org/apache/spark/SparkConf.scala
index 47e69a374074a..c1996e08756a6 100644
--- a/core/src/main/scala/org/apache/spark/SparkConf.scala
+++ b/core/src/main/scala/org/apache/spark/SparkConf.scala
@@ -432,7 +432,7 @@ private[spark] object SparkConf extends Logging {
       AlternateConfig("spark.yarn.applicationMaster.waitTries", "1.3",
         // Translate old value to a duration, with 10s wait time per try.
         translation = s => s"${s.toLong * 10}s")),
-    "spark.rpc.num.retries" -> Seq(
+    "spark.rpc.numRetries" -> Seq(
       AlternateConfig("spark.akka.num.retries", "1.4")),
     "spark.rpc.retry.wait" -> Seq(
       AlternateConfig("spark.akka.retry.wait", "1.4")),
diff --git a/core/src/main/scala/org/apache/spark/util/RpcUtils.scala b/core/src/main/scala/org/apache/spark/util/RpcUtils.scala
index 9c94a7d11391e..5ae793e0e87a3 100644
--- a/core/src/main/scala/org/apache/spark/util/RpcUtils.scala
+++ b/core/src/main/scala/org/apache/spark/util/RpcUtils.scala
@@ -38,21 +38,21 @@ object RpcUtils {
 
   /** Returns the configured number of times to retry connecting */
   def numRetries(conf: SparkConf): Int = {
-    conf.getInt("spark.rpc.num.retries", 3)
+    conf.getInt("spark.rpc.numRetries", 3)
   }
 
   /** Returns the configured number of milliseconds to wait on each retry */
   def retryWaitMs(conf: SparkConf): Long = {
-    conf.getLong("spark.rpc.retry.wait", 3000)
+    conf.getTimeAsMs("spark.rpc.retry.wait", "3s")
   }
 
-  /** Returns the default Spark timeout to use for Rpc ask operations. */
+  /** Returns the default Spark timeout to use for RPC ask operations. */
   def askTimeout(conf: SparkConf): FiniteDuration = {
-    conf.getLong("spark.rpc.askTimeout", 30) seconds
+    conf.getTimeAsSeconds("spark.rpc.askTimeout", "30s") seconds
   }
 
-  /** Returns the default Spark timeout to use for Rpc remote endpoint lookup. */
+  /** Returns the default Spark timeout to use for RPC remote endpoint lookup. */
   def lookupTimeout(conf: SparkConf): FiniteDuration = {
-    conf.getLong("spark.rpc.lookupTimeout", 30) seconds
+    conf.getTimeAsSeconds("spark.rpc.lookupTimeout", "30s") seconds
   }
 }
diff --git a/core/src/test/scala/org/apache/spark/SparkConfSuite.scala b/core/src/test/scala/org/apache/spark/SparkConfSuite.scala
index 157d47d0fddd4..d7d8014a20498 100644
--- a/core/src/test/scala/org/apache/spark/SparkConfSuite.scala
+++ b/core/src/test/scala/org/apache/spark/SparkConfSuite.scala
@@ -19,11 +19,13 @@ package org.apache.spark
 
 import java.util.concurrent.{TimeUnit, Executors}
 
+import scala.concurrent.duration._
+import scala.language.postfixOps
 import scala.util.{Try, Random}
 
 import org.scalatest.FunSuite
 import org.apache.spark.serializer.{KryoRegistrator, KryoSerializer}
-import org.apache.spark.util.ResetSystemProperties
+import org.apache.spark.util.{RpcUtils, ResetSystemProperties}
 import com.esotericsoftware.kryo.Kryo
 
 class SparkConfSuite extends FunSuite with LocalSparkContext with ResetSystemProperties {
@@ -231,16 +233,16 @@ class SparkConfSuite extends FunSuite with LocalSparkContext with ResetSystemPro
     assert(!conf.contains("spark.rpc.lookupTimeout"))
 
     conf.set("spark.akka.num.retries", "1")
-    assert(conf.get("spark.rpc.num.retries") === "1")
+    assert(RpcUtils.numRetries(conf) === 1)
 
     conf.set("spark.akka.retry.wait", "2")
-    assert(conf.get("spark.rpc.retry.wait") === "2")
+    assert(RpcUtils.retryWaitMs(conf) === 2L)
 
     conf.set("spark.akka.askTimeout", "3")
-    assert(conf.get("spark.rpc.askTimeout") === "3")
+    assert(RpcUtils.askTimeout(conf) === (3 seconds))
 
     conf.set("spark.akka.lookupTimeout", "4")
-    assert(conf.get("spark.rpc.lookupTimeout") === "4")
+    assert(RpcUtils.lookupTimeout(conf) === (4 seconds))
   }
 }