[spark-3940][sql]sql Print the error code three times

IF  wrong sql ，the console print error one times。
eg：
spark-sql> show tabless;
show tabless;
14/10/13 21:03:48 INFO ParseDriver: Parsing command: show tabless
NoViableAltException(26@[598:1: ddlStatement : ( createDatabaseStatement | switchDatabaseStatement | dropDatabaseStatement | createTableStatement | dropTableStatement | truncateTableStatement | alterStatement | descStatement | showStatement | metastoreCheck | createViewStatement | dropViewStatement | createFunctionStatement | createMacroStatement | createIndexStatement | dropIndexStatement | dropFunctionStatement | dropMacroStatement | analyzeStatement | lockStatement | unlockStatement | createRoleStatement | dropRoleStatement | grantPrivileges | revokePrivileges | showGrants | showRoleGrants | grantRole | revokeRole );])
	at org.antlr.runtime.DFA.noViableAlt(DFA.java:158)
	at org.antlr.runtime.DFA.predict(DFA.java:144)
	at org.apache.hadoop.hive.ql.parse.HiveParser.ddlStatement(HiveParser.java:1962)
	at org.apache.hadoop.hive.ql.parse.HiveParser.execStatement(HiveParser.java:1298)
	at org.apache.hadoop.hive.ql.parse.HiveParser.statement(HiveParser.java:938)
	at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:190)
	at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:161)
	at org.apache.spark.sql.hive.HiveQl$.getAst(HiveQl.scala:218)
	at org.apache.spark.sql.hive.HiveQl$.createPlan(HiveQl.scala:226)
	at org.apache.spark.sql.hive.ExtendedHiveQlParser$$anonfun$hiveQl$1.apply(ExtendedHiveQlParser.scala:50)
	at org.apache.spark.sql.hive.ExtendedHiveQlParser$$anonfun$hiveQl$1.apply(ExtendedHiveQlParser.scala:49)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:136)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:135)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Failure.append(Parsers.scala:202)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
	at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890)
	at scala.util.parsing.combinator.PackratParsers$$anon$1.apply(PackratParsers.scala:110)
	at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.apply(SparkSQLParser.scala:31)
	at org.apache.spark.sql.hive.HiveQl$$anonfun$3.apply(HiveQl.scala:130)
	at org.apache.spark.sql.hive.HiveQl$$anonfun$3.apply(HiveQl.scala:130)
	at org.apache.spark.sql.catalyst.SparkSQLParser$$anonfun$org$apache$spark$sql$catalyst$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:184)
	at org.apache.spark.sql.catalyst.SparkSQLParser$$anonfun$org$apache$spark$sql$catalyst$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:183)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:136)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:135)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Failure.append(Parsers.scala:202)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
	at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890)
	at scala.util.parsing.combinator.PackratParsers$$anon$1.apply(PackratParsers.scala:110)
	at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.apply(SparkSQLParser.scala:31)
	at org.apache.spark.sql.hive.HiveQl$.parseSql(HiveQl.scala:221)
	at org.apache.spark.sql.hive.HiveContext.sql(HiveContext.scala:98)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLDriver.run(SparkSQLDriver.scala:58)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.processCmd(SparkSQLCLIDriver.scala:274)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:413)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver$.main(SparkSQLCLIDriver.scala:209)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.main(SparkSQLCLIDriver.scala)
14/10/13 21:03:49 ERROR SparkSQLDriver: Failed in [show tabless]
org.apache.spark.sql.hive.HiveQl$ParseException: Failed to parse: show tabless
	at org.apache.spark.sql.hive.HiveQl$.createPlan(HiveQl.scala:225)
	at org.apache.spark.sql.hive.ExtendedHiveQlParser$$anonfun$hiveQl$1.apply(ExtendedHiveQlParser.scala:50)
	at org.apache.spark.sql.hive.ExtendedHiveQlParser$$anonfun$hiveQl$1.apply(ExtendedHiveQlParser.scala:49)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:136)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:135)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Failure.append(Parsers.scala:202)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
	at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890)
	at scala.util.parsing.combinator.PackratParsers$$anon$1.apply(PackratParsers.scala:110)
	at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.apply(SparkSQLParser.scala:31)
	at org.apache.spark.sql.hive.HiveQl$$anonfun$3.apply(HiveQl.scala:130)
	at org.apache.spark.sql.hive.HiveQl$$anonfun$3.apply(HiveQl.scala:130)
	at org.apache.spark.sql.catalyst.SparkSQLParser$$anonfun$org$apache$spark$sql$catalyst$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:184)
	at org.apache.spark.sql.catalyst.SparkSQLParser$$anonfun$org$apache$spark$sql$catalyst$SparkSQLParser$$others$1.apply(SparkSQLParser.scala:183)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:136)
	at scala.util.parsing.combinator.Parsers$Success.map(Parsers.scala:135)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$map$1.apply(Parsers.scala:242)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1$$anonfun$apply$2.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Failure.append(Parsers.scala:202)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$Parser$$anonfun$append$1.apply(Parsers.scala:254)
	at scala.util.parsing.combinator.Parsers$$anon$3.apply(Parsers.scala:222)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.parsing.combinator.Parsers$$anon$2$$anonfun$apply$14.apply(Parsers.scala:891)
	at scala.util.DynamicVariable.withValue(DynamicVariable.scala:57)
	at scala.util.parsing.combinator.Parsers$$anon$2.apply(Parsers.scala:890)
	at scala.util.parsing.combinator.PackratParsers$$anon$1.apply(PackratParsers.scala:110)
	at org.apache.spark.sql.catalyst.AbstractSparkSQLParser.apply(SparkSQLParser.scala:31)
	at org.apache.spark.sql.hive.HiveQl$.parseSql(HiveQl.scala:221)
	at org.apache.spark.sql.hive.HiveContext.sql(HiveContext.scala:98)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLDriver.run(SparkSQLDriver.scala:58)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.processCmd(SparkSQLCLIDriver.scala:274)
	at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:413)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver$.main(SparkSQLCLIDriver.scala:209)
	at org.apache.spark.sql.hive.thriftserver.SparkSQLCLIDriver.main(SparkSQLCLIDriver.scala)
Caused by: org.apache.hadoop.hive.ql.parse.ParseException: line 1:5 cannot recognize input near 'show' 'tabless' '<EOF>' in ddl statement

	at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:193)
	at org.apache.hadoop.hive.ql.parse.ParseDriver.parse(ParseDriver.java:161)
	at org.apache.spark.sql.hive.HiveQl$.getAst(HiveQl.scala:218)
	at org.apache.spark.sql.hive.HiveQl$.createPlan(HiveQl.scala:226)
	... 47 more
Time taken: 4.35 seconds
14/10/13 21:03:51 INFO CliDriver: Time taken: 4.35 seconds
Would you mind to elaborate on why changing the response code to -3 solves this issue?