/**
* 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.assertNotNull;
import static org.junit.Assert.assertNotSame;
import java.io.IOException;
import java.util.Map;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil;
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 HdfsConfiguration();
}
/**
* 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.Builder(conf).numNameNodes(2)
.nameNodePort(9928).build();
try {
cluster.waitActive();
NameNode nn1 = cluster.getNameNode(0);
NameNode nn2 = cluster.getNameNode(1);
assertNotNull("cannot create nn1", nn1);
assertNotNull("cannot create nn2", nn2);
String bpid1 = FSImageTestUtil.getFSImage(nn1).getBlockPoolID();
String bpid2 = FSImageTestUtil.getFSImage(nn2).getBlockPoolID();
String cid1 = FSImageTestUtil.getFSImage(nn1).getClusterID();
String cid2 = FSImageTestUtil.getFSImage(nn2).getClusterID();
int lv1 =FSImageTestUtil.getFSImage(nn1).getLayoutVersion();
int lv2 = FSImageTestUtil.getFSImage(nn2).getLayoutVersion();
int ns1 = FSImageTestUtil.getFSImage(nn1).getNamespaceID();
int ns2 = FSImageTestUtil.getFSImage(nn2).getNamespaceID();
assertNotSame("namespace ids should be different", ns1, ns2);
LOG.info("nn1: lv=" + lv1 + ";cid=" + cid1 + ";bpid=" + bpid1 + ";uri="
+ nn1.getNameNodeAddress());
LOG.info("nn2: lv=" + lv2 + ";cid=" + cid2 + ";bpid=" + bpid2 + ";uri="
+ nn2.getNameNodeAddress());
// check number of volumes in fsdataset
DataNode dn = cluster.getDataNodes().get(0);
final Map<String, Object> volInfos = dn.data.getVolumeInfoMap();
Assert.assertTrue("No volumes in the fsdataset", volInfos.size() > 0);
int i = 0;
for (Map.Entry<String, Object> e : volInfos.entrySet()) {
LOG.info("vol " + i++ + ") " + e.getKey() + ": " + e.getValue());
}
// number of volumes should be 2 - [data1, data2]
assertEquals("number of volumes is wrong", 2, volInfos.size());
for (BPOfferService bpos : dn.getAllBpOs()) {
LOG.info("reg: bpid=" + "; name=" + bpos.bpRegistration.name + "; sid="
+ bpos.bpRegistration.storageID + "; nna=" + bpos.nnAddr);
}
BPOfferService bpos1 = dn.getAllBpOs()[0];
BPOfferService bpos2 = dn.getAllBpOs()[1];
// The order of bpos is not guaranteed, so fix the order
if (bpos1.nnAddr.equals(nn2.getNameNodeAddress())) {
BPOfferService tmp = bpos1;
bpos1 = bpos2;
bpos2 = tmp;
}
assertEquals("wrong nn address", bpos1.nnAddr,
nn1.getNameNodeAddress());
assertEquals("wrong nn address", bpos2.nnAddr,
nn2.getNameNodeAddress());
assertEquals("wrong bpid", bpos1.getBlockPoolId(), bpid1);
assertEquals("wrong bpid", bpos2.getBlockPoolId(), bpid2);
assertEquals("wrong cid", dn.getClusterId(), cid1);
assertEquals("cid should be same", cid2, cid1);
assertEquals("namespace should be same",
bpos1.bpNSInfo.namespaceID, ns1);
assertEquals("namespace should be same",
bpos2.bpNSInfo.namespaceID, 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.Builder(conf)
.nameNodePort(9927).build();
try {
NameNode nn1 = cluster.getNameNode();
assertNotNull("cannot create nn1", nn1);
String bpid1 = FSImageTestUtil.getFSImage(nn1).getBlockPoolID();
String cid1 = FSImageTestUtil.getFSImage(nn1).getClusterID();
int lv1 = FSImageTestUtil.getFSImage(nn1).getLayoutVersion();
LOG.info("nn1: lv=" + lv1 + ";cid=" + cid1 + ";bpid=" + bpid1 + ";uri="
+ nn1.getNameNodeAddress());
// check number of vlumes in fsdataset
DataNode dn = cluster.getDataNodes().get(0);
final Map<String, Object> volInfos = dn.data.getVolumeInfoMap();
Assert.assertTrue("No volumes in the fsdataset", volInfos.size() > 0);
int i = 0;
for (Map.Entry<String, Object> e : volInfos.entrySet()) {
LOG.info("vol " + i++ + ") " + e.getKey() + ": " + e.getValue());
}
// number of volumes should be 2 - [data1, data2]
assertEquals("number of volumes is wrong", 2, volInfos.size());
for (BPOfferService bpos : dn.getAllBpOs()) {
LOG.info("reg: bpid=" + "; name=" + bpos.bpRegistration.name + "; sid="
+ bpos.bpRegistration.storageID + "; nna=" + bpos.nnAddr);
}
// try block report
BPOfferService bpos1 = dn.getAllBpOs()[0];
bpos1.lastBlockReport = 0;
bpos1.blockReport();
assertEquals("wrong nn address", bpos1.nnAddr,
nn1.getNameNodeAddress());
assertEquals("wrong bpid", bpos1.getBlockPoolId(), bpid1);
assertEquals("wrong cid", dn.getClusterId(), cid1);
cluster.shutdown();
// Ensure all the BPOfferService threads are shutdown
assertEquals(0, dn.getAllBpOs().length);
cluster = null;
} finally {
if (cluster != null) {
cluster.shutdown();
}
}
}
@Test
public void testClusterIdMismatch() throws IOException {
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numNameNodes(2).
nameNodePort(9928).build();
try {
cluster.waitActive();
DataNode dn = cluster.getDataNodes().get(0);
BPOfferService [] bposs = dn.getAllBpOs();
LOG.info("dn bpos len (should be 2):" + bposs.length);
Assert.assertEquals("should've registered with two namenodes", bposs.length,2);
// add another namenode
cluster.addNameNode(conf, 9938);
bposs = dn.getAllBpOs();
LOG.info("dn bpos len (should be 3):" + bposs.length);
Assert.assertEquals("should've registered with three namenodes", bposs.length,3);
// change cluster id and another Namenode
StartupOption.FORMAT.setClusterId("DifferentCID");
cluster.addNameNode(conf, 9948);
NameNode nn4 = cluster.getNameNode(3);
assertNotNull("cannot create nn4", nn4);
bposs = dn.getAllBpOs();
LOG.info("dn bpos len (still should be 3):" + bposs.length);
Assert.assertEquals("should've registered with three namenodes", 3, bposs.length);
} finally {
if(cluster != null)
cluster.shutdown();
}
}
@Test
public void testMiniDFSClusterWithMultipleNN() throws IOException {
Configuration conf = new HdfsConfiguration();
// start Federated cluster and add a node.
MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numNameNodes(2).
nameNodePort(9928).build();
Assert.assertNotNull(cluster);
Assert.assertEquals("(1)Should be 2 namenodes", 2, cluster.getNumNameNodes());
// add a node
cluster.addNameNode(conf, 9929);
Assert.assertEquals("(1)Should be 3 namenodes", 3, cluster.getNumNameNodes());
cluster.shutdown();
// 2. start with Federation flag set
conf = new HdfsConfiguration();
cluster = new MiniDFSCluster.Builder(conf).federation(true).
nameNodePort(9928).build();
Assert.assertNotNull(cluster);
Assert.assertEquals("(2)Should be 1 namenodes", 1, cluster.getNumNameNodes());
// add a node
cluster.addNameNode(conf, 9929);
Assert.assertEquals("(2)Should be 2 namenodes", 2, cluster.getNumNameNodes());
cluster.shutdown();
// 3. start non-federated
conf = new HdfsConfiguration();
cluster = new MiniDFSCluster.Builder(conf).build();
Assert.assertNotNull(cluster);
Assert.assertEquals("(2)Should be 1 namenodes", 1, cluster.getNumNameNodes());
// add a node
try {
cluster.addNameNode(conf, 9929);
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();
}
}
}