/**
* 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.yarn.server.nodemanager.containermanager.localizer.sharedcache;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Map;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.ipc.RPC;
import org.apache.hadoop.service.AbstractService;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.event.EventHandler;
import org.apache.hadoop.yarn.ipc.YarnRPC;
import org.apache.hadoop.yarn.server.api.SCMUploaderProtocol;
import org.apache.hadoop.yarn.server.nodemanager.containermanager.localizer.LocalResourceRequest;
import com.google.common.util.concurrent.ThreadFactoryBuilder;
@Private
@Unstable
/**
* Service that uploads localized files to the shared cache. The upload is
* considered not critical, and is done on a best-effort basis. Failure to
* upload is not fatal.
*/
public class SharedCacheUploadService extends AbstractService implements
EventHandler<SharedCacheUploadEvent> {
private static final Log LOG =
LogFactory.getLog(SharedCacheUploadService.class);
private boolean enabled;
private FileSystem fs;
private FileSystem localFs;
private ExecutorService uploaderPool;
private SCMUploaderProtocol scmClient;
public SharedCacheUploadService() {
super(SharedCacheUploadService.class.getName());
}
@Override
protected void serviceInit(Configuration conf) throws Exception {
enabled = conf.getBoolean(YarnConfiguration.SHARED_CACHE_ENABLED,
YarnConfiguration.DEFAULT_SHARED_CACHE_ENABLED);
if (enabled) {
int threadCount =
conf.getInt(YarnConfiguration.SHARED_CACHE_NM_UPLOADER_THREAD_COUNT,
YarnConfiguration.DEFAULT_SHARED_CACHE_NM_UPLOADER_THREAD_COUNT);
uploaderPool = Executors.newFixedThreadPool(threadCount,
new ThreadFactoryBuilder().
setNameFormat("Shared cache uploader #%d").
build());
scmClient = createSCMClient(conf);
try {
fs = FileSystem.get(conf);
localFs = FileSystem.getLocal(conf);
} catch (IOException e) {
LOG.error("Unexpected exception in getting the filesystem", e);
throw new RuntimeException(e);
}
}
super.serviceInit(conf);
}
private SCMUploaderProtocol createSCMClient(Configuration conf) {
YarnRPC rpc = YarnRPC.create(conf);
InetSocketAddress scmAddress =
conf.getSocketAddr(YarnConfiguration.SCM_UPLOADER_SERVER_ADDRESS,
YarnConfiguration.DEFAULT_SCM_UPLOADER_SERVER_ADDRESS,
YarnConfiguration.DEFAULT_SCM_UPLOADER_SERVER_PORT);
return (SCMUploaderProtocol)rpc.getProxy(
SCMUploaderProtocol.class, scmAddress, conf);
}
@Override
protected void serviceStop() throws Exception {
if (enabled) {
uploaderPool.shutdown();
RPC.stopProxy(scmClient);
}
super.serviceStop();
}
@Override
public void handle(SharedCacheUploadEvent event) {
if (enabled) {
Map<LocalResourceRequest,Path> resources = event.getResources();
for (Map.Entry<LocalResourceRequest,Path> e: resources.entrySet()) {
SharedCacheUploader uploader =
new SharedCacheUploader(e.getKey(), e.getValue(), event.getUser(),
getConfig(), scmClient, fs, localFs);
// fire off an upload task
uploaderPool.submit(uploader);
}
}
}
public boolean isEnabled() {
return enabled;
}
}