/**
* 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.pig.test;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapreduce.filecache.DistributedCache;
import org.apache.hadoop.mapreduce.v2.MiniMRYarnCluster;
import org.apache.pig.ExecType;
import org.apache.pig.backend.hadoop.executionengine.mapReduceLayer.MRConfiguration;
/**
* This class builds a single instance of itself with the Singleton
* design pattern. While building the single instance, it sets up a
* mini cluster that actually consists of a mini DFS cluster and a
* mini MapReduce cluster on the local machine and also sets up the
* environment for Pig to run on top of the mini cluster.
*/
public class MiniCluster extends MiniGenericCluster {
private static final File CONF_DIR = new File("build/classes");
private static final File CONF_FILE = new File(CONF_DIR, "hadoop-site.xml");
protected MiniMRYarnCluster m_mr = null;
private Configuration m_dfs_conf = null;
private Configuration m_mr_conf = null;
/**
* @deprecated use {@link org.apache.pig.test.MiniGenericCluster.buildCluster() instead.
*/
@Deprecated
public static MiniCluster buildCluster() {
System.setProperty("test.exec.type", "mr");
return (MiniCluster)MiniGenericCluster.buildCluster("mr");
}
@Override
public ExecType getExecType() {
return ExecType.MAPREDUCE;
}
@Override
protected void setupMiniDfsAndMrClusters() {
try {
final int dataNodes = 4; // There will be 4 data nodes
final int taskTrackers = 4; // There will be 4 task tracker nodes
System.setProperty("hadoop.log.dir", "build/test/logs");
// Create the dir that holds hadoop-site.xml file
// Delete if hadoop-site.xml exists already
CONF_DIR.mkdirs();
if(CONF_FILE.exists()) {
CONF_FILE.delete();
}
// Builds and starts the mini dfs and mapreduce clusters
Configuration config = new Configuration();
config.set("yarn.scheduler.capacity.root.queues", "default");
config.set("yarn.scheduler.capacity.root.default.capacity", "100");
m_dfs = new MiniDFSCluster(config, dataNodes, true, null);
m_fileSys = m_dfs.getFileSystem();
m_dfs_conf = m_dfs.getConfiguration(0);
//Create user home directory
m_fileSys.mkdirs(m_fileSys.getWorkingDirectory());
m_mr = new MiniMRYarnCluster("PigMiniCluster", taskTrackers);
m_mr.init(m_dfs_conf);
m_mr.start();
// Write the necessary config info to hadoop-site.xml
m_mr_conf = new Configuration(m_mr.getConfig());
m_conf = m_mr_conf;
m_conf.set("fs.default.name", m_dfs_conf.get("fs.default.name"));
m_conf.unset(MRConfiguration.JOB_CACHE_FILES);
m_conf.setInt(MRConfiguration.IO_SORT_MB, 200);
m_conf.set(MRConfiguration.CHILD_JAVA_OPTS, "-Xmx512m");
m_conf.setInt(MRConfiguration.SUMIT_REPLICATION, 2);
m_conf.setInt(MRConfiguration.MAP_MAX_ATTEMPTS, 2);
m_conf.setInt(MRConfiguration.REDUCE_MAX_ATTEMPTS, 2);
m_conf.set("dfs.datanode.address", "0.0.0.0:0");
m_conf.set("dfs.datanode.http.address", "0.0.0.0:0");
m_conf.set("pig.jobcontrol.sleep", "100");
m_conf.writeXml(new FileOutputStream(CONF_FILE));
m_fileSys.copyFromLocalFile(new Path(CONF_FILE.getAbsoluteFile().toString()),
new Path("/pigtest/conf/hadoop-site.xml"));
DistributedCache.addFileToClassPath(new Path("/pigtest/conf/hadoop-site.xml"), m_conf);
System.err.println("XXX: Setting fs.default.name to: " + m_dfs_conf.get("fs.default.name"));
// Set the system properties needed by Pig
System.setProperty("cluster", m_conf.get(MRConfiguration.JOB_TRACKER));
//System.setProperty("namenode", m_dfs_conf.get("fs.default.name"));
System.setProperty("namenode", m_conf.get("fs.default.name"));
System.setProperty("junit.hadoop.conf", CONF_DIR.getPath());
} catch (IOException e) {
throw new RuntimeException(e);
}
}
@Override
protected void shutdownMiniMrClusters() {
// Delete hadoop-site.xml on shutDown
if(CONF_FILE.exists()) {
CONF_FILE.delete();
}
if (m_mr != null) { m_mr.stop(); }
m_mr = null;
}
}