[MINOR][DOCS] Use multi-line JavaDoc comments in Scala code.

## What changes were proposed in this pull request?

This PR aims to fix all Scala-Style multiline comments into Java-Style multiline comments in Scala codes.
(All comment-only changes over 77 files: +786 lines, −747 lines)

## How was this patch tested?

Manual.

Author: Dongjoon Hyun <dongjoon@apache.org>

Closes #12130 from dongjoon-hyun/use_multiine_javadoc_comments.

1 files changed, 8 insertions, 8 deletions

diff --git a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
index 5af2c29808..4b36da309d 100644
--- a/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
+++ b/yarn/src/main/scala/org/apache/spark/deploy/yarn/YarnSparkHadoopUtil.scala
@@ -135,8 +135,8 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
   }
 
   /**
-    * Obtains token for the Hive metastore and adds them to the credentials.
-    */
+   * Obtains token for the Hive metastore and adds them to the credentials.
+   */
   def obtainTokenForHiveMetastore(
       sparkConf: SparkConf,
       conf: Configuration,
@@ -149,8 +149,8 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
   }
 
   /**
-    * Obtain a security token for HBase.
-    */
+   * Obtain a security token for HBase.
+   */
   def obtainTokenForHBase(
       sparkConf: SparkConf,
       conf: Configuration,
@@ -164,10 +164,10 @@ class YarnSparkHadoopUtil extends SparkHadoopUtil {
   }
 
   /**
-    * Return whether delegation tokens should be retrieved for the given service when security is
-    * enabled. By default, tokens are retrieved, but that behavior can be changed by setting
-    * a service-specific configuration.
-    */
+   * Return whether delegation tokens should be retrieved for the given service when security is
+   * enabled. By default, tokens are retrieved, but that behavior can be changed by setting
+   * a service-specific configuration.
+   */
   private def shouldGetTokens(conf: SparkConf, service: String): Boolean = {
     conf.getBoolean(s"spark.yarn.security.tokens.${service}.enabled", true)
   }