| /** |
| * 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.dfs; |
| |
| 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.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); |
| } |
| |
| 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"); |
| 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); |
| } |
| } |
| } |