[SPARK-4623]Add the some error infomation if using spark-sql in yarn-cluster mode

If using spark-sql in yarn-cluster mode, print an error infomation just as the spark shell in yarn-cluster mode.

Author: carlmartin <carlmartinmax@gmail.com>
Author: huangzhaowei <carlmartinmax@gmail.com>

Closes #3479 from SaintBacchus/sparkSqlShell and squashes the following commits:

35829a9 [carlmartin] improve the description of comment
e6c1eb7 [carlmartin] add a comment in bin/spark-sql to remind user who wants to change the class
f1c5c8d [carlmartin] Merge branch 'master' into sparkSqlShell
8e112c5 [huangzhaowei] singular form
ec957bc [carlmartin] Add the some error infomation if using spark-sql in yarn-cluster mode
7bcecc2 [carlmartin] Merge branch 'master' of https://github.com/apache/spark into codereview
4fad75a [carlmartin] Add the Error infomation using spark-sql in yarn-cluster mode

bin/spark-sql

@@ -23,6 +23,8 @@
 # Enter posix mode for bash
 set -o posix
 
+# NOTE: This exact class name is matched downstream by SparkSubmit.
+# Any changes need to be reflected there.
 CLASS="org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver"
 
 # Figure out where Spark is installed

core/src/main/scala/org/apache/spark/deploy/SparkSubmit.scala

@@ -142,6 +142,8 @@ object SparkSubmit {
         printErrorAndExit("Cluster deploy mode is currently not supported for python applications.")
       case (_, CLUSTER) if isShell(args.primaryResource) =>
         printErrorAndExit("Cluster deploy mode is not applicable to Spark shells.")
+      case (_, CLUSTER) if isSqlShell(args.mainClass) =>
+        printErrorAndExit("Cluster deploy mode is not applicable to Spark SQL shell.")
       case _ =>
     }
 
@@ -393,6 +395,13 @@ object SparkSubmit {
     primaryResource == SPARK_SHELL || primaryResource == PYSPARK_SHELL
   }
 
+  /**
+   * Return whether the given main class represents a sql shell.
+   */
+  private[spark] def isSqlShell(mainClass: String): Boolean = {
+    mainClass == "org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver"
+  }
+
   /**
    * Return whether the given primary resource requires running python.
    */