| /** |
| * 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.net.InetSocketAddress; |
| |
| import org.apache.hadoop.hdfs.protocol.FSConstants.DatanodeReportType; |
| import org.apache.hadoop.hdfs.protocol.DatanodeInfo; |
| import org.apache.hadoop.hdfs.DFSClient; |
| import junit.framework.TestCase; |
| |
| /** |
| * This class tests that a file need not be closed before its |
| * data can be read by another client. |
| */ |
| public class TestDatanodeRegistration extends TestCase { |
| |
| /** |
| * Regression test for HDFS-894 ensures that, when datanodes |
| * are restarted, the new IPC port is registered with the |
| * namenode. |
| */ |
| public void testChangeIpcPort() throws Exception { |
| HdfsConfiguration conf = new HdfsConfiguration(); |
| MiniDFSCluster cluster = null; |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).build(); |
| InetSocketAddress addr = new InetSocketAddress( |
| "localhost", |
| cluster.getNameNodePort()); |
| DFSClient client = new DFSClient(addr, conf); |
| |
| // Restart datanodes |
| cluster.restartDataNodes(); |
| |
| // Wait until we get a heartbeat from the new datanode |
| DatanodeInfo[] report = client.datanodeReport(DatanodeReportType.ALL); |
| long firstUpdateAfterRestart = report[0].getLastUpdate(); |
| |
| boolean gotHeartbeat = false; |
| for (int i = 0; i < 10 && !gotHeartbeat; i++) { |
| try { |
| Thread.sleep(i*1000); |
| } catch (InterruptedException ie) {} |
| |
| report = client.datanodeReport(DatanodeReportType.ALL); |
| gotHeartbeat = (report[0].getLastUpdate() > firstUpdateAfterRestart); |
| } |
| if (!gotHeartbeat) { |
| fail("Never got a heartbeat from restarted datanode."); |
| } |
| |
| int realIpcPort = cluster.getDataNodes().get(0).getIpcPort(); |
| // Now make sure the reported IPC port is the correct one. |
| assertEquals(realIpcPort, report[0].getIpcPort()); |
| } finally { |
| if (cluster != null) { |
| cluster.shutdown(); |
| } |
| } |
| } |
| } |