| /** |
| * 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.ipc; |
| |
| import com.google.protobuf.ServiceException; |
| import org.apache.hadoop.fs.CommonConfigurationKeys; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import java.util.concurrent.Callable; |
| import java.util.concurrent.ExecutionException; |
| import java.util.concurrent.ExecutorService; |
| import java.util.concurrent.Executors; |
| import java.util.concurrent.Future; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| /** Split from TestRPC. */ |
| @SuppressWarnings("deprecation") |
| public class TestRPCServerShutdown extends TestRpcBase { |
| |
| public static final Logger LOG = |
| LoggerFactory.getLogger(TestRPCServerShutdown.class); |
| |
| @Before |
| public void setup() { |
| setupConf(); |
| } |
| |
| /** |
| * Verify the RPC server can shutdown properly when callQueue is full. |
| */ |
| @Test (timeout=30000) |
| public void testRPCServerShutdown() throws Exception { |
| final int numClients = 3; |
| final List<Future<Void>> res = new ArrayList<Future<Void>>(); |
| final ExecutorService executorService = |
| Executors.newFixedThreadPool(numClients); |
| conf.setInt(CommonConfigurationKeys.IPC_CLIENT_CONNECT_MAX_RETRIES_KEY, 0); |
| RPC.Builder builder = newServerBuilder(conf) |
| .setQueueSizePerHandler(1).setNumHandlers(1).setVerbose(true); |
| final Server server = setupTestServer(builder); |
| |
| final TestRpcService proxy = getClient(addr, conf); |
| try { |
| // start a sleep RPC call to consume the only handler thread. |
| // Start another sleep RPC call to make callQueue full. |
| // Start another sleep RPC call to make reader thread block on CallQueue. |
| for (int i = 0; i < numClients; i++) { |
| res.add(executorService.submit( |
| new Callable<Void>() { |
| @Override |
| public Void call() throws ServiceException, InterruptedException { |
| proxy.sleep(null, newSleepRequest(100000)); |
| return null; |
| } |
| })); |
| } |
| while (server.getCallQueueLen() != 1 |
| || countThreads(CallQueueManager.class.getName()) != 1 |
| || countThreads(PBServerImpl.class.getName()) != 1) { |
| Thread.sleep(100); |
| } |
| } finally { |
| try { |
| stop(server, proxy); |
| assertEquals("Not enough clients", numClients, res.size()); |
| for (Future<Void> f : res) { |
| try { |
| f.get(); |
| fail("Future get should not return"); |
| } catch (ExecutionException e) { |
| ServiceException se = (ServiceException) e.getCause(); |
| assertTrue("Unexpected exception: " + se, |
| se.getCause() instanceof IOException); |
| LOG.info("Expected exception", e.getCause()); |
| } |
| } |
| } finally { |
| executorService.shutdown(); |
| } |
| } |
| } |
| } |