[SPARK-23639][SQL] Obtain token before init metastore client in SparkSQL CLI

## What changes were proposed in this pull request?

In SparkSQLCLI, SessionState generates before SparkContext instantiating. When we use --proxy-user to impersonate, it's unable to initializing a metastore client to talk to the secured metastore for no kerberos ticket.

This PR use real user ugi to obtain token for owner before talking to kerberized metastore.

## How was this patch tested?

Manually verified with kerberized hive metasotre / hdfs.

Author: Kent Yao <[email protected]>

Closes apache#20784 from yaooqinn/SPARK-23639.

Author: yaooqinn

core/src/main/scala/org/apache/spark/deploy/security/HiveDelegationTokenProvider.scala

@@ -36,7 +36,7 @@ import org.apache.spark.internal.Logging
 import org.apache.spark.internal.config.KEYTAB
 import org.apache.spark.util.Utils
 
-private[security] class HiveDelegationTokenProvider
+private[spark] class HiveDelegationTokenProvider
     extends HadoopDelegationTokenProvider with Logging {
 
   override def serviceName: String = "hive"
@@ -124,9 +124,9 @@ private[security] class HiveDelegationTokenProvider
     val currentUser = UserGroupInformation.getCurrentUser()
     val realUser = Option(currentUser.getRealUser()).getOrElse(currentUser)
 
-   // For some reason the Scala-generated anonymous class ends up causing an
-   // UndeclaredThrowableException, even if you annotate the method with @throws.
-   try {
+    // For some reason the Scala-generated anonymous class ends up causing an
+    // UndeclaredThrowableException, even if you annotate the method with @throws.
+    try {
       realUser.doAs(new PrivilegedExceptionAction[T]() {
         override def run(): T = fn
       })

sql/hive-thriftserver/src/main/scala/org/apache/spark/sql/hive/thriftserver/SparkSQLCLIDriver.scala

@@ -34,11 +34,13 @@ import org.apache.hadoop.hive.ql.Driver
 import org.apache.hadoop.hive.ql.exec.Utilities
 import org.apache.hadoop.hive.ql.processors._
 import org.apache.hadoop.hive.ql.session.SessionState
+import org.apache.hadoop.security.{Credentials, UserGroupInformation}
 import org.apache.log4j.{Level, Logger}
 import org.apache.thrift.transport.TSocket
 
 import org.apache.spark.SparkConf
 import org.apache.spark.deploy.SparkHadoopUtil
+import org.apache.spark.deploy.security.HiveDelegationTokenProvider
 import org.apache.spark.internal.Logging
 import org.apache.spark.sql.AnalysisException
 import org.apache.spark.sql.hive.HiveUtils
@@ -121,6 +123,13 @@ private[hive] object SparkSQLCLIDriver extends Logging {
       }
     }
 
+    val tokenProvider = new HiveDelegationTokenProvider()
+    if (tokenProvider.delegationTokensRequired(sparkConf, hadoopConf)) {
+      val credentials = new Credentials()
+      tokenProvider.obtainDelegationTokens(hadoopConf, sparkConf, credentials)
+      UserGroupInformation.getCurrentUser.addCredentials(credentials)
+    }
+
     SessionState.start(sessionState)
 
     // Clean up after we exit