Github user mateiz commented on a diff in the pull request: https://github.com/apache/spark/pull/12913#discussion_r84570152 --- Diff: core/src/test/scala/org/apache/spark/serializer/UnsafeKryoSerializerSuite.scala --- @@ -0,0 +1,28 @@ +/* + * 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.serializer + +class UnsafeKryoSerializerSuite extends KryoSerializerSuite { + + // This test suite should run all tests in KryoSerializerSuite with kryo unsafe. + + override def beforeAll() { + super.beforeAll() + conf.set("spark.kryo.unsafe", "true") --- End diff -- Have you checked that this runs in the right order w.r.t. the code that initializes a SparkContext in KryoSerializerSuite / SharedSparkContext? You may want to print sc.conf in a test. Otherwise, it would be better to put conf.set("spark.kryo.unsafe", "true") at the top-level inside this class. SharedSparkContext does create a SparkContext in its beforeAll, but you seem to editing the conf after that is done.
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