/**
* 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.hdfs.server.datanode;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertTrue;
import java.io.IOException;
import java.net.InetSocketAddress;
import java.util.Set;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.MiniDFSNNTopology;
import org.apache.hadoop.hdfs.MiniDFSNNTopology.NNConf;
import org.apache.hadoop.hdfs.MiniDFSNNTopology.NSConf;
import org.junit.Test;
import com.google.common.base.Joiner;
import com.google.common.collect.Sets;
/**
* Tests datanode refresh namenode list functionality.
*/
public class TestRefreshNamenodes {
private int nnPort1 = 2221;
private int nnPort2 = 2224;
private int nnPort3 = 2227;
private int nnPort4 = 2230;
@Test
public void testRefreshNamenodes() throws IOException {
// Start cluster with a single NN and DN
Configuration conf = new Configuration();
MiniDFSCluster cluster = null;
try {
MiniDFSNNTopology topology = new MiniDFSNNTopology()
.addNameservice(new NSConf("ns1").addNN(
new NNConf(null).setIpcPort(nnPort1)))
.setFederation(true);
cluster = new MiniDFSCluster.Builder(conf)
.nnTopology(topology)
.build();
DataNode dn = cluster.getDataNodes().get(0);
assertEquals(1, dn.getAllBpOs().length);
cluster.addNameNode(conf, nnPort2);
assertEquals(2, dn.getAllBpOs().length);
cluster.addNameNode(conf, nnPort3);
assertEquals(3, dn.getAllBpOs().length);
cluster.addNameNode(conf, nnPort4);
// Ensure a BPOfferService in the datanodes corresponds to
// a namenode in the cluster
Set<InetSocketAddress> nnAddrsFromCluster = Sets.newHashSet();
for (int i = 0; i < 4; i++) {
assertTrue(nnAddrsFromCluster.add(
cluster.getNameNode(i).getNameNodeAddress()));
}
Set<InetSocketAddress> nnAddrsFromDN = Sets.newHashSet();
for (BPOfferService bpos : dn.getAllBpOs()) {
for (BPServiceActor bpsa : bpos.getBPServiceActors()) {
assertTrue(nnAddrsFromDN.add(bpsa.getNNSocketAddress()));
}
}
assertEquals("",
Joiner.on(",").join(
Sets.symmetricDifference(nnAddrsFromCluster, nnAddrsFromDN)));
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
}