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/*
* 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.util
import java.net.URLClassLoader
import org.scalatest.FunSuite
import org.apache.spark.{SparkContext, SparkException, TestUtils}
class MutableURLClassLoaderSuite extends FunSuite {
val urls2 = List(TestUtils.createJarWithClasses(
classNames = Seq("FakeClass1", "FakeClass2", "FakeClass3"),
toStringValue = "2")).toArray
val urls = List(TestUtils.createJarWithClasses(
classNames = Seq("FakeClass1"),
classNamesWithBase = Seq(("FakeClass2", "FakeClass3")), // FakeClass3 is in parent
toStringValue = "1",
classpathUrls = urls2)).toArray
test("child first") {
val parentLoader = new URLClassLoader(urls2, null)
val classLoader = new ChildFirstURLClassLoader(urls, parentLoader)
val fakeClass = classLoader.loadClass("FakeClass2").newInstance()
val fakeClassVersion = fakeClass.toString
assert(fakeClassVersion === "1")
val fakeClass2 = classLoader.loadClass("FakeClass2").newInstance()
assert(fakeClass.getClass === fakeClass2.getClass)
}
test("parent first") {
val parentLoader = new URLClassLoader(urls2, null)
val classLoader = new MutableURLClassLoader(urls, parentLoader)
val fakeClass = classLoader.loadClass("FakeClass1").newInstance()
val fakeClassVersion = fakeClass.toString
assert(fakeClassVersion === "2")
val fakeClass2 = classLoader.loadClass("FakeClass1").newInstance()
assert(fakeClass.getClass === fakeClass2.getClass)
}
test("child first can fall back") {
val parentLoader = new URLClassLoader(urls2, null)
val classLoader = new ChildFirstURLClassLoader(urls, parentLoader)
val fakeClass = classLoader.loadClass("FakeClass3").newInstance()
val fakeClassVersion = fakeClass.toString
assert(fakeClassVersion === "2")
}
test("child first can fail") {
val parentLoader = new URLClassLoader(urls2, null)
val classLoader = new ChildFirstURLClassLoader(urls, parentLoader)
intercept[java.lang.ClassNotFoundException] {
classLoader.loadClass("FakeClassDoesNotExist").newInstance()
}
}
test("driver sets context class loader in local mode") {
// Test the case where the driver program sets a context classloader and then runs a job
// in local mode. This is what happens when ./spark-submit is called with "local" as the
// master.
val original = Thread.currentThread().getContextClassLoader
val className = "ClassForDriverTest"
val jar = TestUtils.createJarWithClasses(Seq(className))
val contextLoader = new URLClassLoader(Array(jar), Utils.getContextOrSparkClassLoader)
Thread.currentThread().setContextClassLoader(contextLoader)
val sc = new SparkContext("local", "driverLoaderTest")
try {
sc.makeRDD(1 to 5, 2).mapPartitions { x =>
val loader = Thread.currentThread().getContextClassLoader
Class.forName(className, true, loader).newInstance()
Seq().iterator
}.count()
}
catch {
case e: SparkException if e.getMessage.contains("ClassNotFoundException") =>
fail("Local executor could not find class", e)
case t: Throwable => fail("Unexpected exception ", t)
}
sc.stop()
Thread.currentThread().setContextClassLoader(original)
}
}
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