/**
* 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;
import java.io.File;
import java.io.IOException;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.hdfs.server.datanode.DataNode;
import org.apache.hadoop.hdfs.server.namenode.NameNode;
import org.apache.hadoop.hdfs.server.namenode.SecondaryNameNode;
import org.apache.hadoop.ipc.RPC;
/**
* This test checks correctness of port usage by hdfs components:
* NameNode, DataNode, and SecondaryNamenode.
*
* The correct behavior is:<br>
* - when a specific port is provided the server must either start on that port
* or fail by throwing {@link java.net.BindException}.<br>
* - if the port = 0 (ephemeral) then the server should choose
* a free port and start on it.
*/
public class TestHDFSServerPorts extends TestCase {
public static final String NAME_NODE_HOST = "localhost:";
public static final String NAME_NODE_HTTP_HOST = "0.0.0.0:";
Configuration config;
File hdfsDir;
/**
* Start the name-node.
*/
public NameNode startNameNode() throws IOException {
String dataDir = System.getProperty("test.build.data");
hdfsDir = new File(dataDir, "dfs");
if ( hdfsDir.exists() && !FileUtil.fullyDelete(hdfsDir) ) {
throw new IOException("Could not delete hdfs directory '" + hdfsDir + "'");
}
config = new Configuration();
config.set("dfs.name.dir", new File(hdfsDir, "name1").getPath());
FileSystem.setDefaultUri(config, "hdfs://"+NAME_NODE_HOST + "0");
config.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0");
NameNode.format(config);
String[] args = new String[] {};
// NameNode will modify config with the ports it bound to
return NameNode.createNameNode(args, config);
}
/**
* Start the data-node.
*/
public DataNode startDataNode(int index, Configuration config)
throws IOException {
String dataDir = System.getProperty("test.build.data");
File dataNodeDir = new File(dataDir, "data-" + index);
config.set("dfs.data.dir", dataNodeDir.getPath());
String[] args = new String[] {};
// NameNode will modify config with the ports it bound to
return DataNode.createDataNode(args, config);
}
/**
* Stop the datanode.
*/
public void stopDataNode(DataNode dn) {
if (dn != null) {
dn.shutdown();
}
}
public void stopNameNode(NameNode nn) {
if (nn != null) {
nn.stop();
}
}
public Configuration getConfig() {
return this.config;
}
/**
* Check whether the name-node can be started.
*/
private boolean canStartNameNode(Configuration conf) throws IOException {
NameNode nn2 = null;
try {
nn2 = NameNode.createNameNode(new String[]{}, conf);
} catch(IOException e) {
if (e instanceof java.net.BindException)
return false;
throw e;
}
stopNameNode(nn2);
return true;
}
/**
* Check whether the data-node can be started.
*/
private boolean canStartDataNode(Configuration conf) throws IOException {
DataNode dn = null;
try {
dn = DataNode.createDataNode(new String[]{}, conf);
} catch(IOException e) {
if (e instanceof java.net.BindException)
return false;
throw e;
}
dn.shutdown();
return true;
}
/**
* Check whether the secondary name-node can be started.
*/
private boolean canStartSecondaryNode(Configuration conf) throws IOException {
SecondaryNameNode sn = null;
try {
sn = new SecondaryNameNode(conf);
} catch(IOException e) {
if (e instanceof java.net.BindException)
return false;
throw e;
}
sn.shutdown();
return true;
}
/**
* Verify name-node port usage.
*/
public void testNameNodePorts() throws Exception {
NameNode nn = null;
try {
nn = startNameNode();
// start another namenode on the same port
Configuration conf2 = new Configuration(config);
conf2.set("dfs.name.dir", new File(hdfsDir, "name2").getPath());
NameNode.format(conf2);
boolean started = canStartNameNode(conf2);
assertFalse(started); // should fail
// start on a different main port
FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0");
started = canStartNameNode(conf2);
assertFalse(started); // should fail again
// reset conf2 since NameNode modifies it
FileSystem.setDefaultUri(conf2, "hdfs://"+NAME_NODE_HOST + "0");
// different http port
conf2.set("dfs.http.address", NAME_NODE_HTTP_HOST + "0");
started = canStartNameNode(conf2);
assertTrue(started); // should start now
} finally {
stopNameNode(nn);
}
}
/**
* Verify data-node port usage.
*/
public void testDataNodePorts() throws Exception {
NameNode nn = null;
try {
nn = startNameNode();
// start data-node on the same port as name-node
Configuration conf2 = new Configuration(config);
conf2.set("dfs.data.dir", new File(hdfsDir, "data").getPath());
conf2.set("dfs.datanode.address",
FileSystem.getDefaultUri(config).getAuthority());
conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0");
boolean started = canStartDataNode(conf2);
assertFalse(started); // should fail
// bind http server to the same port as name-node
conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0");
conf2.set("dfs.datanode.http.address",
config.get("dfs.http.address"));
started = canStartDataNode(conf2);
assertFalse(started); // should fail
// both ports are different from the name-node ones
conf2.set("dfs.datanode.address", NAME_NODE_HOST + "0");
conf2.set("dfs.datanode.http.address", NAME_NODE_HTTP_HOST + "0");
conf2.set("dfs.datanode.ipc.address", NAME_NODE_HOST + "0");
started = canStartDataNode(conf2);
assertTrue(started); // should start now
} finally {
stopNameNode(nn);
}
}
/**
* Verify secondary name-node port usage.
*/
public void testSecondaryNodePorts() throws Exception {
NameNode nn = null;
try {
nn = startNameNode();
// bind http server to the same port as name-node
Configuration conf2 = new Configuration(config);
conf2.set("dfs.secondary.http.address",
config.get("dfs.http.address"));
SecondaryNameNode.LOG.info("= Starting 1 on: " +
conf2.get("dfs.secondary.http.address"));
boolean started = canStartSecondaryNode(conf2);
assertFalse(started); // should fail
// bind http server to a different port
conf2.set("dfs.secondary.http.address", NAME_NODE_HTTP_HOST + "0");
SecondaryNameNode.LOG.info("= Starting 2 on: " +
conf2.get("dfs.secondary.http.address"));
started = canStartSecondaryNode(conf2);
assertTrue(started); // should start now
} finally {
stopNameNode(nn);
}
}
}