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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.spark.network;
import java.io.IOException;
import java.util.Collections;
import java.util.HashSet;
import java.util.Map;
import java.util.NoSuchElementException;
import java.util.Set;
import java.util.concurrent.atomic.AtomicInteger;
import com.google.common.collect.Maps;
import org.junit.After;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.apache.spark.network.client.TransportClient;
import org.apache.spark.network.client.TransportClientFactory;
import org.apache.spark.network.server.NoOpRpcHandler;
import org.apache.spark.network.server.RpcHandler;
import org.apache.spark.network.server.TransportServer;
import org.apache.spark.network.util.ConfigProvider;
import org.apache.spark.network.util.MapConfigProvider;
import org.apache.spark.network.util.JavaUtils;
import org.apache.spark.network.util.TransportConf;
public class TransportClientFactorySuite {
private TransportConf conf;
private TransportContext context;
private TransportServer server1;
private TransportServer server2;
@Before
public void setUp() {
conf = new TransportConf("shuffle", MapConfigProvider.EMPTY);
RpcHandler rpcHandler = new NoOpRpcHandler();
context = new TransportContext(conf, rpcHandler);
server1 = context.createServer();
server2 = context.createServer();
}
@After
public void tearDown() {
JavaUtils.closeQuietly(server1);
JavaUtils.closeQuietly(server2);
}
/**
* Request a bunch of clients to a single server to test
* we create up to maxConnections of clients.
*
* If concurrent is true, create multiple threads to create clients in parallel.
*/
private void testClientReuse(final int maxConnections, boolean concurrent)
throws IOException, InterruptedException {
Map<String, String> configMap = Maps.newHashMap();
configMap.put("spark.shuffle.io.numConnectionsPerPeer", Integer.toString(maxConnections));
TransportConf conf = new TransportConf("shuffle", new MapConfigProvider(configMap));
RpcHandler rpcHandler = new NoOpRpcHandler();
TransportContext context = new TransportContext(conf, rpcHandler);
final TransportClientFactory factory = context.createClientFactory();
final Set<TransportClient> clients = Collections.synchronizedSet(
new HashSet<TransportClient>());
final AtomicInteger failed = new AtomicInteger();
Thread[] attempts = new Thread[maxConnections * 10];
// Launch a bunch of threads to create new clients.
for (int i = 0; i < attempts.length; i++) {
attempts[i] = new Thread() {
@Override
public void run() {
try {
TransportClient client =
factory.createClient(TestUtils.getLocalHost(), server1.getPort());
assertTrue(client.isActive());
clients.add(client);
} catch (IOException e) {
failed.incrementAndGet();
}
}
};
if (concurrent) {
attempts[i].start();
} else {
attempts[i].run();
}
}
// Wait until all the threads complete.
for (int i = 0; i < attempts.length; i++) {
attempts[i].join();
}
Assert.assertEquals(0, failed.get());
Assert.assertEquals(clients.size(), maxConnections);
for (TransportClient client : clients) {
client.close();
}
factory.close();
}
@Test
public void reuseClientsUpToConfigVariable() throws Exception {
testClientReuse(1, false);
testClientReuse(2, false);
testClientReuse(3, false);
testClientReuse(4, false);
}
@Test
public void reuseClientsUpToConfigVariableConcurrent() throws Exception {
testClientReuse(1, true);
testClientReuse(2, true);
testClientReuse(3, true);
testClientReuse(4, true);
}
@Test
public void returnDifferentClientsForDifferentServers() throws IOException {
TransportClientFactory factory = context.createClientFactory();
TransportClient c1 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
TransportClient c2 = factory.createClient(TestUtils.getLocalHost(), server2.getPort());
assertTrue(c1.isActive());
assertTrue(c2.isActive());
assertTrue(c1 != c2);
factory.close();
}
@Test
public void neverReturnInactiveClients() throws IOException, InterruptedException {
TransportClientFactory factory = context.createClientFactory();
TransportClient c1 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
c1.close();
long start = System.currentTimeMillis();
while (c1.isActive() && (System.currentTimeMillis() - start) < 3000) {
Thread.sleep(10);
}
assertFalse(c1.isActive());
TransportClient c2 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
assertFalse(c1 == c2);
assertTrue(c2.isActive());
factory.close();
}
@Test
public void closeBlockClientsWithFactory() throws IOException {
TransportClientFactory factory = context.createClientFactory();
TransportClient c1 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
TransportClient c2 = factory.createClient(TestUtils.getLocalHost(), server2.getPort());
assertTrue(c1.isActive());
assertTrue(c2.isActive());
factory.close();
assertFalse(c1.isActive());
assertFalse(c2.isActive());
}
@Test
public void closeIdleConnectionForRequestTimeOut() throws IOException, InterruptedException {
TransportConf conf = new TransportConf("shuffle", new ConfigProvider() {
@Override
public String get(String name) {
if ("spark.shuffle.io.connectionTimeout".equals(name)) {
// We should make sure there is enough time for us to observe the channel is active
return "1s";
}
String value = System.getProperty(name);
if (value == null) {
throw new NoSuchElementException(name);
}
return value;
}
@Override
public Iterable<Map.Entry<String, String>> getAll() {
throw new UnsupportedOperationException();
}
});
TransportContext context = new TransportContext(conf, new NoOpRpcHandler(), true);
TransportClientFactory factory = context.createClientFactory();
try {
TransportClient c1 = factory.createClient(TestUtils.getLocalHost(), server1.getPort());
assertTrue(c1.isActive());
long expiredTime = System.currentTimeMillis() + 10000; // 10 seconds
while (c1.isActive() && System.currentTimeMillis() < expiredTime) {
Thread.sleep(10);
}
assertFalse(c1.isActive());
} finally {
factory.close();
}
}
}
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