/**
* 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.mapreduce.v2.app.launcher;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import java.util.concurrent.BlockingQueue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicBoolean;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.ShuffleHandler;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.v2.api.records.TaskAttemptId;
import org.apache.hadoop.mapreduce.v2.app.AppContext;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptContainerLaunchedEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptDiagnosticsUpdateEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEvent;
import org.apache.hadoop.mapreduce.v2.app.job.event.TaskAttemptEventType;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.util.StringUtils;
import org.apache.hadoop.yarn.api.protocolrecords.StartContainerRequest;
import org.apache.hadoop.yarn.api.protocolrecords.StartContainersRequest;
import org.apache.hadoop.yarn.api.protocolrecords.StartContainersResponse;
import org.apache.hadoop.yarn.api.protocolrecords.StopContainersRequest;
import org.apache.hadoop.yarn.api.protocolrecords.StopContainersResponse;
import org.apache.hadoop.yarn.api.records.ContainerId;
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
import org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy;
import org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy.ContainerManagementProtocolProxyData;
import org.apache.hadoop.yarn.exceptions.YarnRuntimeException;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
/**
* This class is responsible for launching of containers.
*/
public class ContainerLauncherImpl extends AbstractService implements
ContainerLauncher {
static final Log LOG = LogFactory.getLog(ContainerLauncherImpl.class);
private ConcurrentHashMap<ContainerId, Container> containers =
new ConcurrentHashMap<ContainerId, Container>();
private final AppContext context;
protected ThreadPoolExecutor launcherPool;
protected static final int INITIAL_POOL_SIZE = 10;
private int limitOnPoolSize;
private Thread eventHandlingThread;
protected BlockingQueue<ContainerLauncherEvent> eventQueue =
new LinkedBlockingQueue<ContainerLauncherEvent>();
private final AtomicBoolean stopped;
private ContainerManagementProtocolProxy cmProxy;
private Container getContainer(ContainerLauncherEvent event) {
ContainerId id = event.getContainerID();
Container c = containers.get(id);
if(c == null) {
c = new Container(event.getTaskAttemptID(), event.getContainerID(),
event.getContainerMgrAddress());
Container old = containers.putIfAbsent(id, c);
if(old != null) {
c = old;
}
}
return c;
}
private void removeContainerIfDone(ContainerId id) {
Container c = containers.get(id);
if(c != null && c.isCompletelyDone()) {
containers.remove(id);
}
}
private static enum ContainerState {
PREP, FAILED, RUNNING, DONE, KILLED_BEFORE_LAUNCH
}
private class Container {
private ContainerState state;
// store enough information to be able to cleanup the container
private TaskAttemptId taskAttemptID;
private ContainerId containerID;
final private String containerMgrAddress;
public Container(TaskAttemptId taId, ContainerId containerID,
String containerMgrAddress) {
this.state = ContainerState.PREP;
this.taskAttemptID = taId;
this.containerMgrAddress = containerMgrAddress;
this.containerID = containerID;
}
public synchronized boolean isCompletelyDone() {
return state == ContainerState.DONE || state == ContainerState.FAILED;
}
@SuppressWarnings("unchecked")
public synchronized void launch(ContainerRemoteLaunchEvent event) {
LOG.info("Launching " + taskAttemptID);
if(this.state == ContainerState.KILLED_BEFORE_LAUNCH) {
state = ContainerState.DONE;
sendContainerLaunchFailedMsg(taskAttemptID,
"Container was killed before it was launched");
return;
}
ContainerManagementProtocolProxyData proxy = null;
try {
proxy = getCMProxy(containerMgrAddress, containerID);
// Construct the actual Container
ContainerLaunchContext containerLaunchContext =
event.getContainerLaunchContext();
// Now launch the actual container
StartContainerRequest startRequest =
StartContainerRequest.newInstance(containerLaunchContext,
event.getContainerToken());
List<StartContainerRequest> list = new ArrayList<StartContainerRequest>();
list.add(startRequest);
StartContainersRequest requestList = StartContainersRequest.newInstance(list);
StartContainersResponse response =
proxy.getContainerManagementProtocol().startContainers(requestList);
if (response.getFailedRequests() != null
&& response.getFailedRequests().containsKey(containerID)) {
throw response.getFailedRequests().get(containerID).deSerialize();
}
ByteBuffer portInfo =
response.getAllServicesMetaData().get(
ShuffleHandler.MAPREDUCE_SHUFFLE_SERVICEID);
int port = -1;
if(portInfo != null) {
port = ShuffleHandler.deserializeMetaData(portInfo);
}
LOG.info("Shuffle port returned by ContainerManager for "
+ taskAttemptID + " : " + port);
if(port < 0) {
this.state = ContainerState.FAILED;
throw new IllegalStateException("Invalid shuffle port number "
+ port + " returned for " + taskAttemptID);
}
// after launching, send launched event to task attempt to move
// it from ASSIGNED to RUNNING state
context.getEventHandler().handle(
new TaskAttemptContainerLaunchedEvent(taskAttemptID, port));
this.state = ContainerState.RUNNING;
} catch (Throwable t) {
String message = "Container launch failed for " + containerID + " : "
+ StringUtils.stringifyException(t);
this.state = ContainerState.FAILED;
sendContainerLaunchFailedMsg(taskAttemptID, message);
} finally {
if (proxy != null) {
cmProxy.mayBeCloseProxy(proxy);
}
}
}
@SuppressWarnings("unchecked")
public synchronized void kill() {
if(this.state == ContainerState.PREP) {
this.state = ContainerState.KILLED_BEFORE_LAUNCH;
} else if (!isCompletelyDone()) {
LOG.info("KILLING " + taskAttemptID);
ContainerManagementProtocolProxyData proxy = null;
try {
proxy = getCMProxy(this.containerMgrAddress, this.containerID);
// kill the remote container if already launched
List<ContainerId> ids = new ArrayList<ContainerId>();
ids.add(this.containerID);
StopContainersRequest request = StopContainersRequest.newInstance(ids);
StopContainersResponse response =
proxy.getContainerManagementProtocol().stopContainers(request);
if (response.getFailedRequests() != null
&& response.getFailedRequests().containsKey(this.containerID)) {
throw response.getFailedRequests().get(this.containerID)
.deSerialize();
}
} catch (Throwable t) {
// ignore the cleanup failure
String message = "cleanup failed for container "
+ this.containerID + " : "
+ StringUtils.stringifyException(t);
context.getEventHandler()
.handle(
new TaskAttemptDiagnosticsUpdateEvent(this.taskAttemptID,
message));
LOG.warn(message);
} finally {
if (proxy != null) {
cmProxy.mayBeCloseProxy(proxy);
}
}
this.state = ContainerState.DONE;
}
// after killing, send killed event to task attempt
context.getEventHandler().handle(
new TaskAttemptEvent(this.taskAttemptID,
TaskAttemptEventType.TA_CONTAINER_CLEANED));
}
}
public ContainerLauncherImpl(AppContext context) {
super(ContainerLauncherImpl.class.getName());
this.context = context;
this.stopped = new AtomicBoolean(false);
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
this.limitOnPoolSize = conf.getInt(
MRJobConfig.MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT,
MRJobConfig.DEFAULT_MR_AM_CONTAINERLAUNCHER_THREAD_COUNT_LIMIT);
LOG.info("Upper limit on the thread pool size is " + this.limitOnPoolSize);
super.serviceInit(conf);
cmProxy = new ContainerManagementProtocolProxy(conf);
}
protected void serviceStart() throws Exception {
ThreadFactory tf = new ThreadFactoryBuilder().setNameFormat(
"ContainerLauncher #%d").setDaemon(true).build();
// Start with a default core-pool size of 10 and change it dynamically.
launcherPool = new ThreadPoolExecutor(INITIAL_POOL_SIZE,
Integer.MAX_VALUE, 1, TimeUnit.HOURS,
new LinkedBlockingQueue<Runnable>(),
tf);
eventHandlingThread = new Thread() {
@Override
public void run() {
ContainerLauncherEvent event = null;
Set<String> allNodes = new HashSet<String>();
while (!stopped.get() && !Thread.currentThread().isInterrupted()) {
try {
event = eventQueue.take();
} catch (InterruptedException e) {
if (!stopped.get()) {
LOG.error("Returning, interrupted : " + e);
}
return;
}
allNodes.add(event.getContainerMgrAddress());
int poolSize = launcherPool.getCorePoolSize();
// See if we need up the pool size only if haven't reached the
// maximum limit yet.
if (poolSize != limitOnPoolSize) {
// nodes where containers will run at *this* point of time. This is
// *not* the cluster size and doesn't need to be.
int numNodes = allNodes.size();
int idealPoolSize = Math.min(limitOnPoolSize, numNodes);
if (poolSize < idealPoolSize) {
// Bump up the pool size to idealPoolSize+INITIAL_POOL_SIZE, the
// later is just a buffer so we are not always increasing the
// pool-size
int newPoolSize = Math.min(limitOnPoolSize, idealPoolSize
+ INITIAL_POOL_SIZE);
LOG.info("Setting ContainerLauncher pool size to " + newPoolSize
+ " as number-of-nodes to talk to is " + numNodes);
launcherPool.setCorePoolSize(newPoolSize);
}
}
// the events from the queue are handled in parallel
// using a thread pool
launcherPool.execute(createEventProcessor(event));
// TODO: Group launching of multiple containers to a single
// NodeManager into a single connection
}
}
};
eventHandlingThread.setName("ContainerLauncher Event Handler");
eventHandlingThread.start();
super.serviceStart();
}
private void shutdownAllContainers() {
for (Container ct : this.containers.values()) {
if (ct != null) {
ct.kill();
}
}
}
protected void serviceStop() throws Exception {
if (stopped.getAndSet(true)) {
// return if already stopped
return;
}
// shutdown any containers that might be left running
shutdownAllContainers();
if (eventHandlingThread != null) {
eventHandlingThread.interrupt();
}
if (launcherPool != null) {
launcherPool.shutdownNow();
}
super.serviceStop();
}
protected EventProcessor createEventProcessor(ContainerLauncherEvent event) {
return new EventProcessor(event);
}
/**
* Setup and start the container on remote nodemanager.
*/
class EventProcessor implements Runnable {
private ContainerLauncherEvent event;
EventProcessor(ContainerLauncherEvent event) {
this.event = event;
}
@Override
public void run() {
LOG.info("Processing the event " + event.toString());
// Load ContainerManager tokens before creating a connection.
// TODO: Do it only once per NodeManager.
ContainerId containerID = event.getContainerID();
Container c = getContainer(event);
switch(event.getType()) {
case CONTAINER_REMOTE_LAUNCH:
ContainerRemoteLaunchEvent launchEvent
= (ContainerRemoteLaunchEvent) event;
c.launch(launchEvent);
break;
case CONTAINER_REMOTE_CLEANUP:
c.kill();
break;
}
removeContainerIfDone(containerID);
}
}
@SuppressWarnings("unchecked")
void sendContainerLaunchFailedMsg(TaskAttemptId taskAttemptID,
String message) {
LOG.error(message);
context.getEventHandler().handle(
new TaskAttemptDiagnosticsUpdateEvent(taskAttemptID, message));
context.getEventHandler().handle(
new TaskAttemptEvent(taskAttemptID,
TaskAttemptEventType.TA_CONTAINER_LAUNCH_FAILED));
}
@Override
public void handle(ContainerLauncherEvent event) {
try {
eventQueue.put(event);
} catch (InterruptedException e) {
throw new YarnRuntimeException(e);
}
}
public ContainerManagementProtocolProxy.ContainerManagementProtocolProxyData
getCMProxy(String containerMgrBindAddr, ContainerId containerId)
throws IOException {
return cmProxy.getProxy(containerMgrBindAddr, containerId);
}
}