| /** |
| * 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.hadoop.hbase.executor; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.mockito.ArgumentMatchers.anyObject; |
| import static org.mockito.ArgumentMatchers.anyString; |
| import static org.mockito.Mockito.mock; |
| import static org.mockito.Mockito.times; |
| import static org.mockito.Mockito.verify; |
| import static org.mockito.Mockito.when; |
| |
| import java.io.IOException; |
| import java.io.StringWriter; |
| import java.util.concurrent.CountDownLatch; |
| import java.util.concurrent.ThreadPoolExecutor; |
| import java.util.concurrent.TimeUnit; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hbase.HBaseClassTestRule; |
| import org.apache.hadoop.hbase.HBaseConfiguration; |
| import org.apache.hadoop.hbase.Server; |
| import org.apache.hadoop.hbase.Waiter; |
| import org.apache.hadoop.hbase.Waiter.Predicate; |
| import org.apache.hadoop.hbase.executor.ExecutorService.Executor; |
| import org.apache.hadoop.hbase.executor.ExecutorService.ExecutorConfig; |
| import org.apache.hadoop.hbase.executor.ExecutorService.ExecutorStatus; |
| import org.apache.hadoop.hbase.testclassification.MiscTests; |
| import org.apache.hadoop.hbase.testclassification.SmallTests; |
| import org.junit.Assert; |
| import org.junit.ClassRule; |
| import org.junit.Test; |
| import org.junit.experimental.categories.Category; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| @Category({MiscTests.class, SmallTests.class}) |
| public class TestExecutorService { |
| |
| @ClassRule |
| public static final HBaseClassTestRule CLASS_RULE = |
| HBaseClassTestRule.forClass(TestExecutorService.class); |
| |
| private static final Logger LOG = LoggerFactory.getLogger(TestExecutorService.class); |
| |
| @Test |
| public void testExecutorService() throws Exception { |
| int maxThreads = 5; |
| int maxTries = 10; |
| int sleepInterval = 10; |
| |
| Server mockedServer = mock(Server.class); |
| when(mockedServer.getConfiguration()).thenReturn(HBaseConfiguration.create()); |
| |
| // Start an executor service pool with max 5 threads |
| ExecutorService executorService = new ExecutorService("unit_test"); |
| executorService.startExecutorService(executorService.new ExecutorConfig().setExecutorType( |
| ExecutorType.MASTER_SERVER_OPERATIONS).setCorePoolSize(maxThreads)); |
| |
| Executor executor = |
| executorService.getExecutor(ExecutorType.MASTER_SERVER_OPERATIONS); |
| ThreadPoolExecutor pool = executor.threadPoolExecutor; |
| |
| // Assert no threads yet |
| assertEquals(0, pool.getPoolSize()); |
| |
| AtomicBoolean lock = new AtomicBoolean(true); |
| AtomicInteger counter = new AtomicInteger(0); |
| |
| // Submit maxThreads executors. |
| for (int i = 0; i < maxThreads; i++) { |
| executorService.submit( |
| new TestEventHandler(mockedServer, EventType.M_SERVER_SHUTDOWN, |
| lock, counter)); |
| } |
| |
| // The TestEventHandler will increment counter when it starts. |
| int tries = 0; |
| while (counter.get() < maxThreads && tries < maxTries) { |
| LOG.info("Waiting for all event handlers to start..."); |
| Thread.sleep(sleepInterval); |
| tries++; |
| } |
| |
| // Assert that pool is at max threads. |
| assertEquals(maxThreads, counter.get()); |
| assertEquals(maxThreads, pool.getPoolSize()); |
| |
| ExecutorStatus status = executor.getStatus(); |
| assertTrue(status.queuedEvents.isEmpty()); |
| assertEquals(5, status.running.size()); |
| checkStatusDump(status); |
| |
| |
| // Now interrupt the running Executor |
| synchronized (lock) { |
| lock.set(false); |
| lock.notifyAll(); |
| } |
| |
| // Executor increments counter again on way out so.... test that happened. |
| while (counter.get() < (maxThreads * 2) && tries < maxTries) { |
| System.out.println("Waiting for all event handlers to finish..."); |
| Thread.sleep(sleepInterval); |
| tries++; |
| } |
| |
| assertEquals(maxThreads * 2, counter.get()); |
| assertEquals(maxThreads, pool.getPoolSize()); |
| |
| // Add more than the number of threads items. |
| // Make sure we don't get RejectedExecutionException. |
| for (int i = 0; i < (2 * maxThreads); i++) { |
| executorService.submit( |
| new TestEventHandler(mockedServer, EventType.M_SERVER_SHUTDOWN, |
| lock, counter)); |
| } |
| // Now interrupt the running Executor |
| synchronized (lock) { |
| lock.set(false); |
| lock.notifyAll(); |
| } |
| |
| // Make sure threads are still around even after their timetolive expires. |
| Thread.sleep(ExecutorConfig.KEEP_ALIVE_TIME_MILLIS_DEFAULT * 2); |
| assertEquals(maxThreads, pool.getPoolSize()); |
| |
| executorService.shutdown(); |
| |
| assertEquals(0, executorService.getAllExecutorStatuses().size()); |
| |
| // Test that submit doesn't throw NPEs |
| executorService.submit( |
| new TestEventHandler(mockedServer, EventType.M_SERVER_SHUTDOWN, |
| lock, counter)); |
| } |
| |
| private void checkStatusDump(ExecutorStatus status) throws IOException { |
| StringWriter sw = new StringWriter(); |
| status.dumpTo(sw, ""); |
| String dump = sw.toString(); |
| LOG.info("Got status dump:\n" + dump); |
| |
| assertTrue(dump.contains("Waiting on java.util.concurrent.atomic.AtomicBoolean")); |
| } |
| |
| public static class TestEventHandler extends EventHandler { |
| private final AtomicBoolean lock; |
| private AtomicInteger counter; |
| |
| public TestEventHandler(Server server, EventType eventType, AtomicBoolean lock, |
| AtomicInteger counter) { |
| super(server, eventType); |
| this.lock = lock; |
| this.counter = counter; |
| } |
| |
| @Override |
| public void process() throws IOException { |
| int num = counter.incrementAndGet(); |
| LOG.info("Running process #" + num + ", threadName=" + |
| Thread.currentThread().getName()); |
| synchronized (lock) { |
| while (lock.get()) { |
| try { |
| lock.wait(); |
| } catch (InterruptedException e) { |
| // do nothing |
| } |
| } |
| } |
| counter.incrementAndGet(); |
| } |
| } |
| |
| @Test |
| public void testAborting() throws Exception { |
| final Configuration conf = HBaseConfiguration.create(); |
| final Server server = mock(Server.class); |
| when(server.getConfiguration()).thenReturn(conf); |
| |
| ExecutorService executorService = new ExecutorService("unit_test"); |
| executorService.startExecutorService(executorService.new ExecutorConfig().setExecutorType( |
| ExecutorType.MASTER_SERVER_OPERATIONS).setCorePoolSize(1)); |
| |
| |
| executorService.submit(new EventHandler(server, EventType.M_SERVER_SHUTDOWN) { |
| @Override |
| public void process() throws IOException { |
| throw new RuntimeException("Should cause abort"); |
| } |
| }); |
| |
| Waiter.waitFor(conf, 30000, new Predicate<Exception>() { |
| @Override |
| public boolean evaluate() throws Exception { |
| try { |
| verify(server, times(1)).abort(anyString(), (Throwable) anyObject()); |
| return true; |
| } catch (Throwable t) { |
| return false; |
| } |
| } |
| }); |
| |
| executorService.shutdown(); |
| } |
| |
| @Test |
| public void testSnapshotHandlers() throws Exception { |
| final Configuration conf = HBaseConfiguration.create(); |
| final Server server = mock(Server.class); |
| when(server.getConfiguration()).thenReturn(conf); |
| |
| ExecutorService executorService = new ExecutorService("testSnapshotHandlers"); |
| executorService.startExecutorService(executorService.new ExecutorConfig().setExecutorType( |
| ExecutorType.MASTER_SNAPSHOT_OPERATIONS).setCorePoolSize(1)); |
| |
| CountDownLatch latch = new CountDownLatch(1); |
| CountDownLatch waitForEventToStart = new CountDownLatch(1); |
| executorService.submit(new EventHandler(server, EventType.C_M_SNAPSHOT_TABLE) { |
| @Override |
| public void process() throws IOException { |
| waitForEventToStart.countDown(); |
| try { |
| latch.await(); |
| } catch (InterruptedException e) { |
| Thread.currentThread().interrupt(); |
| } |
| } |
| }); |
| |
| //Wait EventHandler to start |
| waitForEventToStart.await(10, TimeUnit.SECONDS); |
| int activeCount = executorService.getExecutor(ExecutorType.MASTER_SNAPSHOT_OPERATIONS) |
| .getThreadPoolExecutor().getActiveCount(); |
| Assert.assertEquals(1, activeCount); |
| latch.countDown(); |
| Waiter.waitFor(conf, 3000, () -> { |
| int count = executorService.getExecutor(ExecutorType.MASTER_SNAPSHOT_OPERATIONS) |
| .getThreadPoolExecutor().getActiveCount(); |
| return count == 0; |
| }); |
| } |
| } |
| |