Github user steveloughran commented on a diff in the pull request:
https://github.com/apache/spark/pull/22598#discussion_r226235800
--- Diff:
external/kafka-0-10-sql/src/test/scala/org/apache/spark/sql/kafka010/KafkaSecurityHelperSuite.scala
---
@@ -0,0 +1,129 @@
+/*
+ * 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.sql.kafka010
+
+import java.util.UUID
+
+import org.apache.hadoop.security.{Credentials, UserGroupInformation}
+import org.apache.hadoop.security.token.Token
+import org.scalatest.BeforeAndAfterEach
+
+import org.apache.spark.{SparkConf, SparkFunSuite}
+import org.apache.spark.internal.config.{KAFKA_KERBEROS_SERVICE_NAME,
KEYTAB, PRINCIPAL}
+import
org.apache.spark.sql.kafka010.TokenUtil.KafkaDelegationTokenIdentifier
+
+class KafkaSecurityHelperSuite extends SparkFunSuite with
BeforeAndAfterEach {
+ private val keytab = "/path/to/keytab"
+ private val kerberosServiceName = "kafka"
+ private val principal = "u...@domain.com"
+ private val tokenId = "tokenId" + UUID.randomUUID().toString
+ private val tokenPassword = "tokenPassword" + UUID.randomUUID().toString
+
+ private var sparkConf: SparkConf = null
+
+ override def beforeEach(): Unit = {
+ super.beforeEach()
+ sparkConf = new SparkConf()
--- End diff --
If you are playing with UGI in tests, its usually safest to
call`UserGroupInformation.reset()` during setup and teardown; this empties out
all existing creds and avoids problems with >1 test in the same JVM
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