kezhuw commented on a change in pull request #14361: URL: https://github.com/apache/flink/pull/14361#discussion_r545755979
########## File path: flink-connectors/flink-connector-jdbc/src/test/java/org/apache/flink/connector/jdbc/internal/connection/SimpleJdbcConnectionProviderDriverClassConcurrentLoadingTest.java ########## @@ -0,0 +1,102 @@ +/* + * 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.flink.connector.jdbc.internal.connection; + +import org.apache.flink.connector.jdbc.JdbcConnectionOptions; +import org.apache.flink.connector.jdbc.fakedb.FakeDBUtils; +import org.apache.flink.core.testutils.CheckedThread; + +import org.junit.Test; + +import java.lang.reflect.Method; +import java.sql.Connection; +import java.util.concurrent.CountDownLatch; +import java.util.function.Function; + +import static org.junit.Assert.assertFalse; +import static org.junit.Assert.assertTrue; + +/** + * This test deals with sql driver class loading issues, write it alone so it won't be + * interfered by other tests. + */ +public class SimpleJdbcConnectionProviderDriverClassConcurrentLoadingTest { + private static boolean isClassLoaded(ClassLoader classLoader, String className) throws Exception { + do { + Method m = ClassLoader.class.getDeclaredMethod("findLoadedClass", String.class); + m.setAccessible(true); + Object loadedClass = m.invoke(classLoader, className); + if (loadedClass != null) { + return true; + } + classLoader = classLoader.getParent(); + } while (classLoader != null); + return false; + } + + @Test Review comment: Done. I have added a 5s timeout in fixup commit, it should be sufficient for this test as there is no IO operations. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org