Github user gaborgsomogyi commented on a diff in the pull request:
https://github.com/apache/spark/pull/22598#discussion_r231458881
--- Diff:
core/src/main/scala/org/apache/spark/deploy/security/KafkaDelegationTokenProvider.scala
---
@@ -0,0 +1,65 @@
+/*
+ * 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
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+ */
+
+package org.apache.spark.deploy.security
+
+import scala.reflect.runtime.universe
+import scala.util.control.NonFatal
+
+import org.apache.hadoop.conf.Configuration
+import org.apache.hadoop.security.Credentials
+import org.apache.hadoop.security.token.{Token, TokenIdentifier}
+
+import org.apache.spark.SparkConf
+import org.apache.spark.internal.Logging
+import org.apache.spark.internal.config.{KAFKA_BOOTSTRAP_SERVERS,
KAFKA_SECURITY_PROTOCOL}
+import org.apache.spark.util.Utils
+
+private[security] class KafkaDelegationTokenProvider
--- End diff --
In general if we're not moving this class into kafka area the only change
which has to be done is to add another package from where the `TokenUtil` can
be loaded. Otherwise `KafkaDelegationTokenProvider` has to be copied from
`spark-sql-kafka...` to `spark-streaming-kafka...`. I think leaving as it is
makes it more simple.
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