manojpec commented on a change in pull request #4363: URL: https://github.com/apache/hudi/pull/4363#discussion_r771806164
########## File path: hudi-client/hudi-client-common/src/test/java/org/apache/hudi/client/transaction/TestTransactionManager.java ########## @@ -0,0 +1,208 @@ +/* + * 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.hudi.client.transaction; + +import org.apache.hudi.client.transaction.lock.InProcessLockProvider; +import org.apache.hudi.common.model.HoodieFailedWritesCleaningPolicy; +import org.apache.hudi.common.model.WriteConcurrencyMode; +import org.apache.hudi.common.testutils.HoodieCommonTestHarness; +import org.apache.hudi.config.HoodieCompactionConfig; +import org.apache.hudi.config.HoodieLockConfig; +import org.apache.hudi.config.HoodieWriteConfig; +import org.apache.hudi.exception.HoodieLockException; +import org.junit.jupiter.api.Assertions; +import org.junit.jupiter.api.BeforeEach; +import org.junit.jupiter.api.Test; + +import java.io.IOException; +import java.util.concurrent.CountDownLatch; +import java.util.concurrent.TimeUnit; +import java.util.concurrent.atomic.AtomicBoolean; + +import static org.junit.jupiter.api.Assertions.assertDoesNotThrow; +import static org.junit.jupiter.api.Assertions.assertThrows; + +public class TestTransactionManager extends HoodieCommonTestHarness { + HoodieWriteConfig writeConfig; + TransactionManager transactionManager; + + @BeforeEach + private void init() throws IOException { + initPath(); + initMetaClient(); + this.writeConfig = getWriteConfig(); + this.transactionManager = new TransactionManager(this.writeConfig, this.metaClient.getFs()); + } + + private HoodieWriteConfig getWriteConfig() { + return HoodieWriteConfig.newBuilder() + .withPath(basePath) + .withCompactionConfig(HoodieCompactionConfig.newBuilder() + .withFailedWritesCleaningPolicy(HoodieFailedWritesCleaningPolicy.LAZY) + .build()) + .withWriteConcurrencyMode(WriteConcurrencyMode.OPTIMISTIC_CONCURRENCY_CONTROL) + .withLockConfig(HoodieLockConfig.newBuilder() + .withLockProvider(InProcessLockProvider.class) + .build()) + .build(); + } + + @Test + public void testSingleWriterTransaction() { + transactionManager.beginTransaction(); + transactionManager.endTransaction(); + } + + @Test + public void testSingleWriterNestedTransaction() { + transactionManager.beginTransaction(); + assertThrows(HoodieLockException.class, () -> { + transactionManager.beginTransaction(); + }); + + transactionManager.endTransaction(); + assertThrows(HoodieLockException.class, () -> { + transactionManager.endTransaction(); + }); + } + + @Test + public void testSingleWriterMultipleTransactions() { + for (int i = 0; i < 32; i++) { + transactionManager.beginTransaction(); + transactionManager.endTransaction(); + } + } + + @Test + public void testMultiWriterTransactions() { + final int threadCount = 3; + final long awaitMaxTimeoutMs = 2000L; + final CountDownLatch latch = new CountDownLatch(threadCount); + final AtomicBoolean writer1Completed = new AtomicBoolean(false); + final AtomicBoolean writer2Completed = new AtomicBoolean(false); + + // Let writer1 get the lock first, then wait for others + // to join the sync up point. + Thread writer1 = new Thread(() -> { + assertDoesNotThrow(() -> { + transactionManager.beginTransaction(); + }); + latch.countDown(); + try { + latch.await(awaitMaxTimeoutMs, TimeUnit.MILLISECONDS); + // Following sleep is to make sure writer2 attempts + // to try lock and to get bocked on the lock which + // this thread is currently holding. + Thread.sleep(50); + } catch (InterruptedException e) { + // + } + assertDoesNotThrow(() -> { + transactionManager.endTransaction(); + }); + writer1Completed.set(true); + }); + writer1.start(); + + // Writer2 will block on trying to acquire the lock + // and will eventually get the lock before the timeout. + Thread writer2 = new Thread(() -> { + latch.countDown(); Review comment: Made both the threads do countDown() and await() which will force the happens-before relationship between these two threads and the make the test deterministic. -- This is an automated message from the Apache Git Service. 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