Github user vanzin commented on a diff in the pull request:
https://github.com/apache/spark/pull/17723#discussion_r120759036
--- Diff:
core/src/main/scala/org/apache/spark/deploy/security/HiveCredentialProvider.scala
---
@@ -0,0 +1,122 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements. See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.spark.deploy.security
+
+import java.lang.reflect.UndeclaredThrowableException
+import java.security.PrivilegedExceptionAction
+
+import scala.util.control.NonFatal
+
+import org.apache.hadoop.conf.Configuration
+import
org.apache.hadoop.hdfs.security.token.delegation.DelegationTokenIdentifier
+import org.apache.hadoop.hive.conf.HiveConf
+import org.apache.hadoop.hive.ql.metadata.Hive
+import org.apache.hadoop.io.Text
+import org.apache.hadoop.security.{Credentials, UserGroupInformation}
+import org.apache.hadoop.security.token.Token
+
+import org.apache.spark.internal.Logging
+import org.apache.spark.util.Utils
+
+private[security] class HiveCredentialProvider extends
HadoopDelegationTokenProvider with Logging {
+
+ override def serviceName: String = "hive"
+
+ private val classNotFoundErrorStr = "You are attempting to use the
HiveCredentialProvider," +
+ "but your Spark distribution is not built with Hive libraries."
+
+ private def hiveConf(hadoopConf: Configuration): Configuration = {
+ try {
+ new HiveConf(hadoopConf, classOf[HiveConf])
+ } catch {
+ case NonFatal(e) =>
+ logDebug("Fail to create Hive Configuration", e)
+ hadoopConf
+ case e: ClassNotFoundException =>
+ logError(classNotFoundErrorStr)
+ throw e
--- End diff --
Hmmm... the user is not attempting, Spark does it by default if for some
reason there's a Hive config available somewhere. So I think `logWarning` and
not throwing an error would be a more user-friendly behavior.
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