/*
* 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 java.io.OutputStream;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.mapred.MiniMRCluster;
public class MiniCluster extends MiniGenericCluster {
private MiniMRCluster m_mr = null;
public MiniCluster() {
super();
}
@Override
protected void setupMiniDfsAndMrClusters() {
try {
System.setProperty("hadoop.log.dir", "build/test/logs");
final int dataNodes = 4; // There will be 4 data nodes
final int taskTrackers = 4; // There will be 4 task tracker nodes
// Create the configuration hadoop-site.xml file
File conf_dir = new File("build/classes/");
conf_dir.mkdirs();
File conf_file = new File(conf_dir, "hadoop-site.xml");
conf_file.delete();
// Builds and starts the mini dfs and mapreduce clusters
Configuration config = new Configuration();
m_dfs = new MiniDFSCluster(config, dataNodes, true, null);
m_fileSys = m_dfs.getFileSystem();
m_mr = new MiniMRCluster(taskTrackers, m_fileSys.getUri().toString(), 1);
// Write the necessary config info to hadoop-site.xml
m_conf = m_mr.createJobConf();
m_conf.setInt("mapred.submit.replication", 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("mapred.map.max.attempts", "2");
m_conf.set("mapred.reduce.max.attempts", "2");
m_conf.set("pig.jobcontrol.sleep", "100");
try (OutputStream os = new FileOutputStream(conf_file))
{
m_conf.writeXml(os);
}
// Set the system properties needed by Pig
System.setProperty("cluster", m_conf.get("mapred.job.tracker"));
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() {
if (m_mr != null) { m_mr.shutdown(); }
m_mr = null;
}
}