| /** |
| * 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.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType.DATA_NODE; |
| import static org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType.NAME_NODE; |
| import static org.junit.Assert.*; |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertFalse; |
| import static org.junit.Assert.fail; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.util.Collections; |
| import java.util.List; |
| |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.NodeType; |
| import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption; |
| import org.apache.hadoop.hdfs.server.common.StorageInfo; |
| import org.apache.hadoop.hdfs.server.namenode.FSImageTestUtil; |
| import org.apache.hadoop.util.StringUtils; |
| import org.junit.After; |
| import org.junit.Test; |
| |
| import com.google.common.base.Charsets; |
| import com.google.common.collect.Lists; |
| |
| /** |
| * This test ensures the appropriate response (successful or failure) from |
| * the system when the system is rolled back under various storage state and |
| * version conditions. |
| */ |
| public class TestDFSRollback { |
| |
| private static final Log LOG = LogFactory.getLog( |
| "org.apache.hadoop.hdfs.TestDFSRollback"); |
| private Configuration conf; |
| private int testCounter = 0; |
| private MiniDFSCluster cluster = null; |
| |
| /** |
| * Writes an INFO log message containing the parameters. |
| */ |
| void log(String label, int numDirs) { |
| LOG.info("============================================================"); |
| LOG.info("***TEST " + (testCounter++) + "*** " |
| + label + ":" |
| + " numDirs="+numDirs); |
| } |
| |
| /** |
| * Verify that the new current directory is the old previous. |
| * It is assumed that the server has recovered and rolled back. |
| */ |
| void checkResult(NodeType nodeType, String[] baseDirs) throws Exception { |
| List<File> curDirs = Lists.newArrayList(); |
| for (String baseDir : baseDirs) { |
| File curDir = new File(baseDir, "current"); |
| curDirs.add(curDir); |
| switch (nodeType) { |
| case NAME_NODE: |
| FSImageTestUtil.assertReasonableNameCurrentDir(curDir); |
| break; |
| case DATA_NODE: |
| assertEquals( |
| UpgradeUtilities.checksumContents(nodeType, curDir), |
| UpgradeUtilities.checksumMasterDataNodeContents()); |
| break; |
| } |
| } |
| |
| FSImageTestUtil.assertParallelFilesAreIdentical( |
| curDirs, Collections.<String>emptySet()); |
| |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertFalse(new File(baseDirs[i],"previous").isDirectory()); |
| } |
| } |
| |
| /** |
| * Attempts to start a NameNode with the given operation. Starting |
| * the NameNode should throw an exception. |
| */ |
| void startNameNodeShouldFail(StartupOption operation, String searchString) { |
| try { |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .startupOption(operation) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .build(); // should fail |
| throw new AssertionError("NameNode should have failed to start"); |
| } catch (Exception expected) { |
| if (!expected.getMessage().contains(searchString)) { |
| fail("Expected substring '" + searchString + "' in exception " + |
| "but got: " + StringUtils.stringifyException(expected)); |
| } |
| // expected |
| } |
| } |
| |
| /** |
| * Attempts to start a DataNode with the given operation. Starting |
| * the given block pool should fail. |
| * @param operation startup option |
| * @param bpid block pool Id that should fail to start |
| * @throws IOException |
| */ |
| void startBlockPoolShouldFail(StartupOption operation, String bpid) |
| throws IOException { |
| cluster.startDataNodes(conf, 1, false, operation, null); // should fail |
| assertFalse("Block pool " + bpid + " should have failed to start", |
| cluster.getDataNodes().get(0).isBPServiceAlive(bpid)); |
| } |
| |
| /** |
| * This test attempts to rollback the NameNode and DataNode under |
| * a number of valid and invalid conditions. |
| */ |
| @Test |
| public void testRollback() throws Exception { |
| File[] baseDirs; |
| UpgradeUtilities.initialize(); |
| |
| StorageInfo storageInfo = null; |
| for (int numDirs = 1; numDirs <= 2; numDirs++) { |
| conf = new HdfsConfiguration(); |
| conf.setInt(DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOURS_KEY, -1); |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs, conf); |
| String[] nameNodeDirs = conf.getStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY); |
| String[] dataNodeDirs = conf.getStrings(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY); |
| |
| log("Normal NameNode rollback", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.ROLLBACK) |
| .build(); |
| checkResult(NAME_NODE, nameNodeDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("Normal DataNode rollback", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.ROLLBACK) |
| .build(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "previous"); |
| cluster.startDataNodes(conf, 1, false, StartupOption.ROLLBACK, null); |
| checkResult(DATA_NODE, dataNodeDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("Normal BlockPool rollback", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.ROLLBACK) |
| .build(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| UpgradeUtilities.createBlockPoolStorageDirs(dataNodeDirs, "current", |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| // Create a previous snapshot for the blockpool |
| UpgradeUtilities.createBlockPoolStorageDirs(dataNodeDirs, "previous", |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| // Older LayoutVersion to make it rollback |
| storageInfo = new StorageInfo( |
| UpgradeUtilities.getCurrentLayoutVersion()+1, |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentClusterID(cluster), |
| UpgradeUtilities.getCurrentFsscTime(cluster)); |
| // Create old VERSION file for each data dir |
| for (int i=0; i<dataNodeDirs.length; i++) { |
| Path bpPrevPath = new Path(dataNodeDirs[i] + "/current/" |
| + UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| UpgradeUtilities.createBlockPoolVersionFile( |
| new File(bpPrevPath.toString()), |
| storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| } |
| |
| cluster.startDataNodes(conf, 1, false, StartupOption.ROLLBACK, null); |
| assertTrue(cluster.isDataNodeUp()); |
| |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode rollback without existing previous dir", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| startNameNodeShouldFail(StartupOption.ROLLBACK, |
| "None of the storage directories contain previous fs state"); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("DataNode rollback without existing previous dir", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.UPGRADE) |
| .build(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| cluster.startDataNodes(conf, 1, false, StartupOption.ROLLBACK, null); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("DataNode rollback with future stored layout version in previous", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.ROLLBACK) |
| .build(); |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "previous"); |
| storageInfo = new StorageInfo(Integer.MIN_VALUE, |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentClusterID(cluster), |
| UpgradeUtilities.getCurrentFsscTime(cluster)); |
| |
| UpgradeUtilities.createDataNodeVersionFile(baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| |
| startBlockPoolShouldFail(StartupOption.ROLLBACK, |
| cluster.getNamesystem().getBlockPoolId()); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("DataNode rollback with newer fsscTime in previous", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(0) |
| .format(false) |
| .manageDataDfsDirs(false) |
| .manageNameDfsDirs(false) |
| .startupOption(StartupOption.ROLLBACK) |
| .build(); |
| |
| UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createDataNodeStorageDirs(dataNodeDirs, "previous"); |
| storageInfo = new StorageInfo(UpgradeUtilities.getCurrentLayoutVersion(), |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentClusterID(cluster), Long.MAX_VALUE); |
| |
| UpgradeUtilities.createDataNodeVersionFile(baseDirs, storageInfo, |
| UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| |
| startBlockPoolShouldFail(StartupOption.ROLLBACK, |
| cluster.getNamesystem().getBlockPoolId()); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode rollback with no edits file", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| deleteMatchingFiles(baseDirs, "edits.*"); |
| startNameNodeShouldFail(StartupOption.ROLLBACK, |
| "Gap in transactions"); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with no image file", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| deleteMatchingFiles(baseDirs, "fsimage_.*"); |
| startNameNodeShouldFail(StartupOption.ROLLBACK, |
| "No valid image files found"); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with corrupt version file", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| for (File f : baseDirs) { |
| UpgradeUtilities.corruptFile( |
| new File(f,"VERSION"), |
| "layoutVersion".getBytes(Charsets.UTF_8), |
| "xxxxxxxxxxxxx".getBytes(Charsets.UTF_8)); |
| } |
| startNameNodeShouldFail(StartupOption.ROLLBACK, |
| "file VERSION has layoutVersion missing"); |
| |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with old layout version in previous", numDirs); |
| UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createNameNodeStorageDirs(nameNodeDirs, "previous"); |
| storageInfo = new StorageInfo(1, |
| UpgradeUtilities.getCurrentNamespaceID(null), |
| UpgradeUtilities.getCurrentClusterID(null), |
| UpgradeUtilities.getCurrentFsscTime(null)); |
| |
| UpgradeUtilities.createNameNodeVersionFile(conf, baseDirs, |
| storageInfo, UpgradeUtilities.getCurrentBlockPoolID(cluster)); |
| startNameNodeShouldFail(StartupOption.ROLLBACK, |
| "Cannot rollback to storage version 1 using this version"); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| } // end numDir loop |
| } |
| |
| private void deleteMatchingFiles(File[] baseDirs, String regex) { |
| for (File baseDir : baseDirs) { |
| for (File f : baseDir.listFiles()) { |
| if (f.getName().matches(regex)) { |
| f.delete(); |
| } |
| } |
| } |
| } |
| |
| @After |
| public void tearDown() throws Exception { |
| LOG.info("Shutting down MiniDFSCluster"); |
| if (cluster != null) cluster.shutdown(); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| new TestDFSRollback().testRollback(); |
| } |
| |
| } |
| |
| |
