TestDFSUpgradeFromImage.java
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- /**
- * 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 junit.framework.TestCase;
- import java.io.*;
- import java.net.InetSocketAddress;
- import java.util.Iterator;
- import java.util.LinkedList;
- import java.util.TreeMap;
- import java.util.zip.CRC32;
- import org.apache.hadoop.conf.Configuration;
- import org.apache.hadoop.fs.FSInputStream;
- import org.apache.hadoop.fs.FileStatus;
- import org.apache.hadoop.fs.FileUtil;
- import org.apache.hadoop.hdfs.protocol.FSConstants;
- import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption;
- import org.apache.commons.logging.Log;
- import org.apache.commons.logging.LogFactory;
- /**
- * This tests data transfer protocol handling in the Datanode. It sends
- * various forms of wrong data and verifies that Datanode handles it well.
- *
- * This test uses the following two file from src/test/.../dfs directory :
- * 1) hadoop-version-dfs-dir.tgz : contains DFS directories.
- * 2) hadoop-dfs-dir.txt : checksums that are compared in this test.
- * Please read hadoop-dfs-dir.txt for more information.
- */
- public class TestDFSUpgradeFromImage extends TestCase {
-
- private static final Log LOG = LogFactory.getLog(
- "org.apache.hadoop.hdfs.TestDFSUpgradeFromImage");
-
- public int numDataNodes = 4;
-
- private static class ReferenceFileInfo {
- String path;
- long checksum;
- }
-
- LinkedList<ReferenceFileInfo> refList = new LinkedList<ReferenceFileInfo>();
- Iterator<ReferenceFileInfo> refIter;
-
- boolean printChecksum = false;
-
- protected void setUp() throws IOException {
- unpackStorage();
- }
- public void unpackStorage() throws IOException {
- String tarFile = System.getProperty("test.cache.data", "build/test/cache") +
- "/hadoop-14-dfs-dir.tgz";
- String dataDir = System.getProperty("test.build.data", "build/test/data");
- File dfsDir = new File(dataDir, "dfs");
- if ( dfsDir.exists() && !FileUtil.fullyDelete(dfsDir) ) {
- throw new IOException("Could not delete dfs directory '" + dfsDir + "'");
- }
- FileUtil.unTar(new File(tarFile), new File(dataDir));
- //Now read the reference info
-
- BufferedReader reader = new BufferedReader(
- new FileReader(System.getProperty("test.cache.data", "build/test/cache") +
- "/hadoop-dfs-dir.txt"));
- String line;
- while ( (line = reader.readLine()) != null ) {
-
- line = line.trim();
- if (line.length() <= 0 || line.startsWith("#")) {
- continue;
- }
- String[] arr = line.split("\s+t\s+");
- if (arr.length < 1) {
- continue;
- }
- if (arr[0].equals("printChecksums")) {
- printChecksum = true;
- break;
- }
- if (arr.length < 2) {
- continue;
- }
- ReferenceFileInfo info = new ReferenceFileInfo();
- info.path = arr[0];
- info.checksum = Long.parseLong(arr[1]);
- refList.add(info);
- }
- reader.close();
- }
- private void verifyChecksum(String path, long checksum) throws IOException {
- if ( refIter == null ) {
- refIter = refList.iterator();
- }
-
- if ( printChecksum ) {
- LOG.info("CRC info for reference file : " + path + " t " + checksum);
- } else {
- if ( !refIter.hasNext() ) {
- throw new IOException("Checking checksum for " + path +
- "Not enough elements in the refList");
- }
- ReferenceFileInfo info = refIter.next();
- // The paths are expected to be listed in the same order
- // as they are traversed here.
- assertEquals(info.path, path);
- assertEquals("Checking checksum for " + path, info.checksum, checksum);
- }
- }
-
- CRC32 overallChecksum = new CRC32();
-
- private void verifyDir(DFSClient client, String dir)
- throws IOException {
-
- FileStatus[] fileArr = client.listPaths(dir);
- TreeMap<String, Boolean> fileMap = new TreeMap<String, Boolean>();
-
- for(FileStatus file : fileArr) {
- String path = file.getPath().toString();
- fileMap.put(path, Boolean.valueOf(file.isDir()));
- }
-
- for(Iterator<String> it = fileMap.keySet().iterator(); it.hasNext();) {
- String path = it.next();
- boolean isDir = fileMap.get(path);
-
- overallChecksum.update(path.getBytes());
-
- if ( isDir ) {
- verifyDir(client, path);
- } else {
- // this is not a directory. Checksum the file data.
- CRC32 fileCRC = new CRC32();
- FSInputStream in = client.open(path);
- byte[] buf = new byte[4096];
- int nRead = 0;
- while ( (nRead = in.read(buf, 0, buf.length)) > 0 ) {
- fileCRC.update(buf, 0, nRead);
- }
-
- verifyChecksum(path, fileCRC.getValue());
- }
- }
- }
-
- private void verifyFileSystem(DFSClient client) throws IOException {
-
- verifyDir(client, "/");
-
- verifyChecksum("overallCRC", overallChecksum.getValue());
-
- if ( printChecksum ) {
- throw new IOException("Checksums are written to log as requested. " +
- "Throwing this exception to force an error " +
- "for this test.");
- }
- }
-
- public void testUpgradeFromImage() throws IOException {
- MiniDFSCluster cluster = null;
- try {
- Configuration conf = new Configuration();
- if (System.getProperty("test.build.data") == null) { // to allow test to be run outside of Ant
- System.setProperty("test.build.data", "build/test/data");
- }
- conf.setInt("dfs.datanode.scan.period.hours", -1); // block scanning off
- cluster = new MiniDFSCluster(0, conf, numDataNodes, false, true,
- StartupOption.UPGRADE, null);
- cluster.waitActive();
- DFSClient dfsClient = new DFSClient(new InetSocketAddress("localhost",
- cluster.getNameNodePort()), conf);
- //Safemode will be off only after upgrade is complete. Wait for it.
- while ( dfsClient.setSafeMode(FSConstants.SafeModeAction.SAFEMODE_GET) ) {
- LOG.info("Waiting for SafeMode to be OFF.");
- try {
- Thread.sleep(1000);
- } catch (InterruptedException ignored) {}
- }
- verifyFileSystem(dfsClient);
- } finally {
- if (cluster != null) { cluster.shutdown(); }
- }
- }
- }