org.apache.hadoop.ipc.TestRPCServerShutdown.java Source code

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Here is the source code for org.apache.hadoop.ipc.TestRPCServerShutdown.java

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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.hadoop.ipc;

import com.google.protobuf.ServiceException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.junit.Before;
import org.junit.Test;

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 Log LOG = LogFactory.getLog(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();
            }
        }
    }
}