/src/test/hdfs/org/apache/hadoop/hdfs/server/datanode/TestDiskError.java
Java | 197 lines | 124 code | 21 blank | 52 comment | 8 complexity | ffd5f69ab0e19f7a7d769661f2492543 MD5 | raw file
- /**
- * 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 java.io.DataOutputStream;
- import java.io.File;
- import java.net.InetSocketAddress;
- import java.net.Socket;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.FileSystem;
- import org.apache.hadoop.fs.Path;
- import org.apache.hadoop.fs.permission.FsPermission;
- import org.apache.hadoop.hdfs.DFSTestUtil;
- import org.apache.hadoop.hdfs.MiniDFSCluster;
- import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
- import org.apache.hadoop.hdfs.protocol.LocatedBlock;
- import org.apache.hadoop.hdfs.protocol.LocatedBlocks;
- import org.apache.hadoop.hdfs.protocol.DataTransferProtocol.BlockConstructionStage;
- import org.apache.hadoop.hdfs.protocol.DataTransferProtocol.Sender;
- import org.apache.hadoop.hdfs.security.token.block.BlockTokenSecretManager;
- import org.apache.hadoop.hdfs.server.namenode.NameNodeAdapter;
- import org.apache.hadoop.hdfs.HdfsConfiguration;
- import org.apache.hadoop.hdfs.DFSConfigKeys;
- import org.junit.Test;
- import org.junit.Before;
- import org.junit.After;
- import static org.junit.Assert.*;
- /**
- * Test that datanodes can correctly handle errors during block read/write.
- */
- public class TestDiskError {
- private FileSystem fs;
- private MiniDFSCluster cluster;
- private Configuration conf;
- @Before
- public void setUp() throws Exception {
- conf = new HdfsConfiguration();
- conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, 512L);
- cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
- cluster.waitActive();
- fs = cluster.getFileSystem();
- }
- @After
- public void tearDown() throws Exception {
- cluster.shutdown();
- }
- /**
- * Test to check that a DN goes down when all its volumes have failed.
- */
- @Test
- public void testShutdown() throws Exception {
- if (System.getProperty("os.name").startsWith("Windows")) {
- /**
- * This test depends on OS not allowing file creations on a directory
- * that does not have write permissions for the user. Apparently it is
- * not the case on Windows (at least under Cygwin), and possibly AIX.
- * This is disabled on Windows.
- */
- return;
- }
- // Bring up two more datanodes
- cluster.startDataNodes(conf, 2, true, null, null);
- cluster.waitActive();
- final int dnIndex = 0;
- String bpid = cluster.getNamesystem().getBlockPoolId();
- File storageDir = MiniDFSCluster.getStorageDir(dnIndex, 0);
- File dir1 = MiniDFSCluster.getRbwDir(storageDir, bpid);
- storageDir = MiniDFSCluster.getStorageDir(dnIndex, 1);
- File dir2 = MiniDFSCluster.getRbwDir(storageDir, bpid);
- try {
- // make the data directory of the first datanode to be readonly
- assertTrue("Couldn't chmod local vol", dir1.setReadOnly());
- assertTrue("Couldn't chmod local vol", dir2.setReadOnly());
- // create files and make sure that first datanode will be down
- DataNode dn = cluster.getDataNodes().get(dnIndex);
- for (int i=0; dn.isDatanodeUp(); i++) {
- Path fileName = new Path("/test.txt"+i);
- DFSTestUtil.createFile(fs, fileName, 1024, (short)2, 1L);
- DFSTestUtil.waitReplication(fs, fileName, (short)2);
- fs.delete(fileName, true);
- }
- } finally {
- // restore its old permission
- dir1.setWritable(true);
- dir2.setWritable(true);
- }
- }
- /**
- * Test that when there is a failure replicating a block the temporary
- * and meta files are cleaned up and subsequent replication succeeds.
- */
- @Test
- public void testReplicationError() throws Exception {
- // create a file of replication factor of 1
- final Path fileName = new Path("/test.txt");
- final int fileLen = 1;
- DFSTestUtil.createFile(fs, fileName, 1, (short)1, 1L);
- DFSTestUtil.waitReplication(fs, fileName, (short)1);
- // get the block belonged to the created file
- LocatedBlocks blocks = NameNodeAdapter.getBlockLocations(
- cluster.getNameNode(), fileName.toString(), 0, (long)fileLen);
- assertEquals("Should only find 1 block", blocks.locatedBlockCount(), 1);
- LocatedBlock block = blocks.get(0);
- // bring up a second datanode
- cluster.startDataNodes(conf, 1, true, null, null);
- cluster.waitActive();
- final int sndNode = 1;
- DataNode datanode = cluster.getDataNodes().get(sndNode);
-
- // replicate the block to the second datanode
- InetSocketAddress target = datanode.getSelfAddr();
- Socket s = new Socket(target.getAddress(), target.getPort());
- // write the header.
- DataOutputStream out = new DataOutputStream(s.getOutputStream());
- Sender.opWriteBlock(out, block.getBlock(), 1,
- BlockConstructionStage.PIPELINE_SETUP_CREATE,
- 0L, 0L, 0L, "", null, new DatanodeInfo[0],
- BlockTokenSecretManager.DUMMY_TOKEN);
- // write check header
- out.writeByte( 1 );
- out.writeInt( 512 );
- out.flush();
- // close the connection before sending the content of the block
- out.close();
- // the temporary block & meta files should be deleted
- String bpid = cluster.getNamesystem().getBlockPoolId();
- File storageDir = MiniDFSCluster.getStorageDir(sndNode, 0);
- File dir1 = MiniDFSCluster.getRbwDir(storageDir, bpid);
- storageDir = MiniDFSCluster.getStorageDir(sndNode, 1);
- File dir2 = MiniDFSCluster.getRbwDir(storageDir, bpid);
- while (dir1.listFiles().length != 0 || dir2.listFiles().length != 0) {
- Thread.sleep(100);
- }
- // then increase the file's replication factor
- fs.setReplication(fileName, (short)2);
- // replication should succeed
- DFSTestUtil.waitReplication(fs, fileName, (short)1);
- // clean up the file
- fs.delete(fileName, false);
- }
- /**
- * Check that the permissions of the local DN directories are as expected.
- */
- @Test
- public void testLocalDirs() throws Exception {
- Configuration conf = new Configuration();
- final String permStr = conf.get(
- DFSConfigKeys.DFS_DATANODE_DATA_DIR_PERMISSION_KEY);
- FsPermission expected = new FsPermission(permStr);
- // Check permissions on directories in 'dfs.datanode.data.dir'
- FileSystem localFS = FileSystem.getLocal(conf);
- for (DataNode dn : cluster.getDataNodes()) {
- String[] dataDirs =
- dn.getConf().getStrings(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY);
- for (String dir : dataDirs) {
- Path dataDir = new Path(dir);
- FsPermission actual = localFS.getFileStatus(dataDir).getPermission();
- assertEquals("Permission for dir: " + dataDir + ", is " + actual +
- ", while expected is " + expected, expected, actual);
- }
- }
- }
- }