/**
* 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.hive.schshim;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicReference;
import org.apache.commons.lang.StringUtils;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hive.shims.SchedulerShim;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationConfiguration;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.AllocationFileLoaderService;
import org.apache.hadoop.yarn.server.resourcemanager.scheduler.fair.QueuePlacementPolicy;
public class FairSchedulerShim implements SchedulerShim {
private static final Log LOG = LogFactory.getLog(FairSchedulerShim.class);
private static final String MR2_JOB_QUEUE_PROPERTY = "mapreduce.job.queuename";
@Override
public void refreshDefaultQueue(Configuration conf, String userName)
throws IOException {
String requestedQueue = YarnConfiguration.DEFAULT_QUEUE_NAME;
final AtomicReference<AllocationConfiguration> allocConf = new AtomicReference<AllocationConfiguration>();
AllocationFileLoaderService allocsLoader = new AllocationFileLoaderService();
allocsLoader.init(conf);
allocsLoader.setReloadListener(new AllocationFileLoaderService.Listener() {
@Override
public void onReload(AllocationConfiguration allocs) {
allocConf.set(allocs);
}
});
try {
allocsLoader.reloadAllocations();
} catch (Exception ex) {
throw new IOException("Failed to load queue allocations", ex);
}
if (allocConf.get() == null) {
allocConf.set(new AllocationConfiguration(conf));
}
QueuePlacementPolicy queuePolicy = allocConf.get().getPlacementPolicy();
if (queuePolicy != null) {
requestedQueue = queuePolicy.assignAppToQueue(requestedQueue, userName);
if (StringUtils.isNotBlank(requestedQueue)) {
LOG.debug("Setting queue name to " + requestedQueue + " for user "
+ userName);
conf.set(MR2_JOB_QUEUE_PROPERTY, requestedQueue);
}
}
}
}