/**
* 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.*;
import java.io.IOException;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.junit.Assert;
import org.junit.Before;
import org.junit.Test;
public class TestDataNodeMultipleRegistrations {
private static final Log LOG =
LogFactory.getLog(TestDataNodeMultipleRegistrations.class);
Configuration conf;
@Before
public void setUp() throws Exception {
conf = new Configuration();
}
/**
* start multiple NNs and single DN and verifies per BP registrations and
* handshakes.
*
* @throws IOException
*/
@Test
public void test2NNRegistration() throws IOException {
MiniDFSCluster cluster = new MiniDFSCluster(0, conf, 1, true, null, 2);
try {
cluster.waitActive();
NameNode nn1 = cluster.getNameNode(0);
NameNode nn2 = cluster.getNameNode(1);
assertNotNull("cannot create nn1", nn1);
assertNotNull("cannot create nn2", nn2);
int lv1 = nn1.getFSImage().getLayoutVersion();
int lv2 = nn2.getFSImage().getLayoutVersion();
int ns1 = nn1.getNamespaceID();
int ns2 = nn2.getNamespaceID();
assertNotSame("namespace ids should be different", ns1, ns2);
LOG.info("nn1: lv=" + lv1 + ";uri=" + nn1.getNameNodeAddress());
LOG.info("nn2: lv=" + lv2 + ";uri=" + nn2.getNameNodeAddress());
// check number of volumes in fsdataset
DataNode dn = cluster.getDataNodes().get(0);
for (NamespaceService nsos : dn.getAllNamespaceServices()) {
LOG.info("reg: nsid =" + nsos.getNamespaceId() + "; name="
+ nsos.getNsRegistration().name + "; sid="
+ nsos.getNsRegistration().storageID + "; nna="
+ nsos.getNNSocketAddress());
}
NamespaceService nsos1 = dn.getAllNamespaceServices()[0];
NamespaceService nsos2 = dn.getAllNamespaceServices()[1];
// The order of bpos is not guaranteed, so fix the order
if (nsos1.getNNSocketAddress().equals(nn2.getNameNodeDNAddress())) {
NamespaceService tmp = nsos1;
nsos1 = nsos2;
nsos2 = tmp;
}
assertEquals("wrong nn address", nsos1.getNNSocketAddress(),
nn1.getNameNodeDNAddress());
assertEquals("wrong nn address", nsos2.getNNSocketAddress(),
nn2.getNameNodeDNAddress());
assertEquals("wrong nsid", nsos1.getNamespaceId(), ns1);
assertEquals("wrong nsid", nsos2.getNamespaceId(), ns2);
} finally {
cluster.shutdown();
}
}
/**
* starts single nn and single dn and verifies registration and handshake
*
* @throws IOException
*/
@Test
public void testFedSingleNN() throws IOException {
MiniDFSCluster cluster = new MiniDFSCluster(0, conf, 1, true, null, 1);
try {
NameNode nn1 = cluster.getNameNode(0);
assertNotNull("cannot create nn1", nn1);
int nsid1 = nn1.getNamespaceID();
int lv1 = nn1.getFSImage().getLayoutVersion();
LOG.info("nn1: lv=" + lv1 + ";nsid=" + nsid1 + ";uri="
+ nn1.getNameNodeAddress());
// check number of vlumes in fsdataset
DataNode dn = cluster.getDataNodes().get(0);
for (NamespaceService nsos : dn.getAllNamespaceServices()) {
LOG.info("reg: nsid =" + nsos.getNamespaceId() + "; name="
+ nsos.getNsRegistration().name + "; sid="
+ nsos.getNsRegistration().storageID + "; nna="
+ nsos.getNNSocketAddress());
}
// try block report
NamespaceService nsos1 = dn.getAllNamespaceServices()[0];
nsos1.scheduleBlockReport(0);
assertEquals("wrong nn address", nsos1.getNNSocketAddress(),
nn1.getNameNodeDNAddress());
assertEquals("wrong nsid", nsos1.getNamespaceId(), nsid1);
cluster.shutdown();
// Ensure all the BPOfferService threads are shutdown
assertEquals(0, dn.getAllNamespaceServices().length);
cluster = null;
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
@Test
public void testMiniDFSClusterWithMultipleNN() throws IOException {
Configuration conf = new Configuration();
// start Federated cluster and add a node.
MiniDFSCluster cluster = new MiniDFSCluster(0, conf, 1, true, null, 2);
Assert.assertNotNull(cluster);
Assert.assertEquals("(1)Should be 2 namenodes", 2, cluster.getNumNameNodes());
// add a node
cluster.addNameNode(conf, MiniDFSCluster.getFreePort());
Assert.assertEquals("(1)Should be 3 namenodes", 3, cluster.getNumNameNodes());
cluster.shutdown();
// 2. start with Federation flag set
conf = new Configuration();
cluster = new MiniDFSCluster(0, conf, 1, true, null, 1);
Assert.assertNotNull(cluster);
Assert.assertEquals("(2)Should be 1 namenodes", 1, cluster.getNumNameNodes());
// add a node
cluster.addNameNode(conf, MiniDFSCluster.getFreePort());
Assert.assertEquals("(2)Should be 2 namenodes", 2, cluster.getNumNameNodes());
cluster.shutdown();
}
@Test
public void testAddingNewNameNodeToNonFederatedCluster() throws IOException {
// 3. start non-federate
Configuration conf = new Configuration();
MiniDFSCluster cluster = new MiniDFSCluster(0, conf, 1, true, true, null, null);
Assert.assertNotNull(cluster);
Assert.assertEquals("(2)Should be 1 namenodes", 1, cluster.getNumNameNodes());
// add a node
try {
cluster.addNameNode(conf, MiniDFSCluster.getFreePort());
Assert.fail("shouldn't be able to add another NN to non federated cluster");
} catch (IOException e) {
// correct
Assert.assertTrue(e.getMessage().startsWith("cannot add namenode"));
Assert.assertEquals("(3)Should be 1 namenodes", 1, cluster.getNumNameNodes());
} finally {
cluster.shutdown();
}
}
}