| /** |
| * 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 static org.junit.Assert.assertEquals; |
| |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.commons.logging.impl.Log4JLogger; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FSDataOutputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode; |
| import org.apache.hadoop.hdfs.server.namenode.FSNamesystem; |
| import org.apache.hadoop.hdfs.server.namenode.LeaseManager; |
| import org.apache.hadoop.hdfs.server.protocol.InterDatanodeProtocol; |
| import org.apache.hadoop.io.IOUtils; |
| import org.apache.log4j.Level; |
| import org.junit.Test; |
| |
| /** |
| * This class tests client lease recovery. |
| */ |
| public class TestFileCreationClient { |
| static final String DIR = "/" + TestFileCreationClient.class.getSimpleName() + "/"; |
| |
| { |
| ((Log4JLogger)DataNode.LOG).getLogger().setLevel(Level.ALL); |
| ((Log4JLogger)LeaseManager.LOG).getLogger().setLevel(Level.ALL); |
| ((Log4JLogger)LogFactory.getLog(FSNamesystem.class)).getLogger().setLevel(Level.ALL); |
| ((Log4JLogger)InterDatanodeProtocol.LOG).getLogger().setLevel(Level.ALL); |
| } |
| |
| /** Test lease recovery Triggered by DFSClient. */ |
| @Test |
| public void testClientTriggeredLeaseRecovery() throws Exception { |
| final int REPLICATION = 3; |
| Configuration conf = new HdfsConfiguration(); |
| conf.setInt(DFSConfigKeys.DFS_DATANODE_HANDLER_COUNT_KEY, 1); |
| conf.setInt(DFSConfigKeys.DFS_REPLICATION_KEY, REPLICATION); |
| MiniDFSCluster cluster = new MiniDFSCluster.Builder(conf).numDataNodes(REPLICATION).build(); |
| |
| try { |
| final FileSystem fs = cluster.getFileSystem(); |
| final Path dir = new Path("/wrwelkj"); |
| |
| SlowWriter[] slowwriters = new SlowWriter[10]; |
| for(int i = 0; i < slowwriters.length; i++) { |
| slowwriters[i] = new SlowWriter(fs, new Path(dir, "file" + i)); |
| } |
| |
| try { |
| for(int i = 0; i < slowwriters.length; i++) { |
| slowwriters[i].start(); |
| } |
| |
| Thread.sleep(1000); // let writers get started |
| |
| //stop a datanode, it should have least recover. |
| cluster.stopDataNode(AppendTestUtil.nextInt(REPLICATION)); |
| |
| //let the slow writer writes a few more seconds |
| System.out.println("Wait a few seconds"); |
| Thread.sleep(5000); |
| } |
| finally { |
| for(int i = 0; i < slowwriters.length; i++) { |
| if (slowwriters[i] != null) { |
| slowwriters[i].running = false; |
| slowwriters[i].interrupt(); |
| } |
| } |
| for(int i = 0; i < slowwriters.length; i++) { |
| if (slowwriters[i] != null) { |
| slowwriters[i].join(); |
| } |
| } |
| } |
| |
| //Verify the file |
| System.out.println("Verify the file"); |
| for(int i = 0; i < slowwriters.length; i++) { |
| System.out.println(slowwriters[i].filepath + ": length=" |
| + fs.getFileStatus(slowwriters[i].filepath).getLen()); |
| FSDataInputStream in = null; |
| try { |
| in = fs.open(slowwriters[i].filepath); |
| for(int j = 0, x; (x = in.read()) != -1; j++) { |
| assertEquals(j, x); |
| } |
| } |
| finally { |
| IOUtils.closeStream(in); |
| } |
| } |
| } finally { |
| if (cluster != null) {cluster.shutdown();} |
| } |
| } |
| |
| static class SlowWriter extends Thread { |
| final FileSystem fs; |
| final Path filepath; |
| boolean running = true; |
| |
| SlowWriter(FileSystem fs, Path filepath) { |
| super(SlowWriter.class.getSimpleName() + ":" + filepath); |
| this.fs = fs; |
| this.filepath = filepath; |
| } |
| |
| @Override |
| public void run() { |
| FSDataOutputStream out = null; |
| int i = 0; |
| try { |
| out = fs.create(filepath); |
| for(; running; i++) { |
| System.out.println(getName() + " writes " + i); |
| out.write(i); |
| out.hflush(); |
| sleep(100); |
| } |
| } |
| catch(Exception e) { |
| System.out.println(getName() + " dies: e=" + e); |
| } |
| finally { |
| System.out.println(getName() + ": i=" + i); |
| IOUtils.closeStream(out); |
| } |
| } |
| } |
| } |