/*
* 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.twill.yarn;
import com.google.common.base.Charsets;
import com.google.common.collect.Sets;
import com.google.common.io.LineReader;
import org.apache.twill.api.Command;
import org.apache.twill.api.ResourceSpecification;
import org.apache.twill.api.TwillController;
import org.apache.twill.api.TwillRunner;
import org.apache.twill.api.logging.PrinterLogHandler;
import org.apache.twill.discovery.Discoverable;
import org.junit.Assert;
import org.junit.Test;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.util.Set;
/**
*
*/
public final class FailureRestartTestRun extends BaseYarnTest {
@Test
public void testFailureRestart() throws Exception {
TwillRunner runner = YarnTestUtils.getTwillRunner();
ResourceSpecification resource = ResourceSpecification.Builder.with()
.setVirtualCores(1)
.setMemory(512, ResourceSpecification.SizeUnit.MEGA)
.setInstances(2)
.build();
TwillController controller = runner.prepare(new FailureRunnable(), resource)
.withApplicationArguments("failure")
.withArguments(FailureRunnable.class.getSimpleName(), "failure2")
.addLogHandler(new PrinterLogHandler(new PrintWriter(System.out, true)))
.start();
Iterable<Discoverable> discoverables = controller.discoverService("failure");
Assert.assertTrue(YarnTestUtils.waitForSize(discoverables, 2, 60));
// Make sure we see the right instance IDs
Assert.assertEquals(Sets.newHashSet(0, 1), getInstances(discoverables));
// Kill server with instanceId = 0
controller.sendCommand(FailureRunnable.class.getSimpleName(), Command.Builder.of("kill0").build());
// Make sure the runnable is killed.
Assert.assertTrue(YarnTestUtils.waitForSize(discoverables, 1, 60));
// Wait for the restart
Assert.assertTrue(YarnTestUtils.waitForSize(discoverables, 2, 60));
// Make sure we see the right instance IDs
Assert.assertEquals(Sets.newHashSet(0, 1), getInstances(discoverables));
controller.stopAndWait();
}
private Set<Integer> getInstances(Iterable<Discoverable> discoverables) throws IOException {
Set<Integer> instances = Sets.newHashSet();
for (Discoverable discoverable : discoverables) {
InetSocketAddress socketAddress = discoverable.getSocketAddress();
Socket socket = new Socket(socketAddress.getAddress(), socketAddress.getPort());
try {
PrintWriter writer = new PrintWriter(new OutputStreamWriter(socket.getOutputStream(), Charsets.UTF_8), true);
LineReader reader = new LineReader(new InputStreamReader(socket.getInputStream(), Charsets.UTF_8));
String msg = "Failure";
writer.println(msg);
String line = reader.readLine();
Assert.assertTrue(line.endsWith(msg));
instances.add(Integer.parseInt(line.substring(0, line.length() - msg.length())));
} finally {
socket.close();
}
}
return instances;
}
/**
* A SocketServer that fails upon receiving a kill command.
*/
public static final class FailureRunnable extends SocketServer {
private volatile boolean killed;
@Override
public void run() {
killed = false;
super.run();
if (killed) {
throw new RuntimeException("Exception");
}
}
@Override
public void handleCommand(Command command) throws Exception {
if (command.getCommand().equals("kill" + getContext().getInstanceId())) {
killed = true;
running = false;
serverSocket.close();
}
}
@Override
public void handleRequest(BufferedReader reader, PrintWriter writer) throws IOException {
String line = reader.readLine();
writer.println(getContext().getInstanceId() + line);
writer.flush();
}
}
}