| /** |
| * 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.dfs; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import junit.framework.TestCase; |
| import org.apache.commons.logging.Log; |
| import org.apache.commons.logging.LogFactory; |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.dfs.FSConstants.NodeType; |
| import static org.apache.hadoop.dfs.FSConstants.NodeType.NAME_NODE; |
| import static org.apache.hadoop.dfs.FSConstants.NodeType.DATA_NODE; |
| import org.apache.hadoop.dfs.FSConstants.StartupOption; |
| import org.apache.hadoop.fs.FileUtil; |
| |
| /** |
| * 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 extends TestCase { |
| |
| private static final Log LOG = LogFactory.getLog( |
| "org.apache.hadoop.dfs.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 IOException { |
| switch (nodeType) { |
| case NAME_NODE: |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertTrue(new File(baseDirs[i],"current").isDirectory()); |
| assertTrue(new File(baseDirs[i],"current/VERSION").isFile()); |
| assertTrue(new File(baseDirs[i],"current/edits").isFile()); |
| assertTrue(new File(baseDirs[i],"current/fsimage").isFile()); |
| assertTrue(new File(baseDirs[i],"current/fstime").isFile()); |
| } |
| break; |
| case DATA_NODE: |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertEquals( |
| UpgradeUtilities.checksumContents( |
| nodeType, new File(baseDirs[i],"current")), |
| UpgradeUtilities.checksumMasterContents(nodeType)); |
| } |
| break; |
| } |
| 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) { |
| try { |
| cluster = new MiniDFSCluster(conf, 0, operation); // should fail |
| throw new AssertionError("NameNode should have failed to start"); |
| } catch (Exception expected) { |
| // expected |
| } |
| } |
| |
| /** |
| * Attempts to start a DataNode with the given operation. Starting |
| * the DataNode should throw an exception. |
| */ |
| void startDataNodeShouldFail(StartupOption operation) { |
| try { |
| cluster.startDataNodes(conf, 1, false, operation, null); // should fail |
| throw new AssertionError("DataNode should have failed to start"); |
| } catch (Exception expected) { |
| // expected |
| assertFalse(cluster.isDataNodeUp()); |
| } |
| } |
| |
| /** |
| * This test attempts to rollback the NameNode and DataNode under |
| * a number of valid and invalid conditions. |
| */ |
| public void testRollback() throws Exception { |
| File[] baseDirs; |
| UpgradeUtilities.initialize(); |
| |
| for (int numDirs = 1; numDirs <= 2; numDirs++) { |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs); |
| String[] nameNodeDirs = conf.getStrings("dfs.name.dir"); |
| String[] dataNodeDirs = conf.getStrings("dfs.data.dir"); |
| |
| log("Normal NameNode rollback", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.ROLLBACK); |
| checkResult(NAME_NODE, nameNodeDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("Normal DataNode rollback", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.ROLLBACK); |
| UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "current"); |
| UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "previous"); |
| cluster.startDataNodes(conf, 1, false, StartupOption.ROLLBACK, null); |
| checkResult(DATA_NODE, dataNodeDirs); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode rollback without existing previous dir", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| startNameNodeShouldFail(StartupOption.ROLLBACK); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("DataNode rollback without existing previous dir", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.UPGRADE); |
| UpgradeUtilities.createStorageDirs(DATA_NODE, 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.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.ROLLBACK); |
| UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "previous"); |
| UpgradeUtilities.createVersionFile(DATA_NODE, baseDirs, |
| new StorageInfo(Integer.MIN_VALUE, |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| UpgradeUtilities.getCurrentFsscTime(cluster))); |
| startDataNodeShouldFail(StartupOption.ROLLBACK); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("DataNode rollback with newer fsscTime in previous", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.ROLLBACK); |
| UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(DATA_NODE, dataNodeDirs, "previous"); |
| UpgradeUtilities.createVersionFile(DATA_NODE, baseDirs, |
| new StorageInfo(UpgradeUtilities.getCurrentLayoutVersion(), |
| UpgradeUtilities.getCurrentNamespaceID(cluster), |
| Long.MAX_VALUE)); |
| startDataNodeShouldFail(StartupOption.ROLLBACK); |
| cluster.shutdown(); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| UpgradeUtilities.createEmptyDirs(dataNodeDirs); |
| |
| log("NameNode rollback with no edits file", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| for (File f : baseDirs) { |
| FileUtil.fullyDelete(new File(f,"edits")); |
| } |
| startNameNodeShouldFail(StartupOption.ROLLBACK); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with no image file", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| for (File f : baseDirs) { |
| FileUtil.fullyDelete(new File(f,"fsimage")); |
| } |
| startNameNodeShouldFail(StartupOption.ROLLBACK); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with corrupt version file", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| for (File f : baseDirs) { |
| UpgradeUtilities.corruptFile(new File(f,"VERSION")); |
| } |
| startNameNodeShouldFail(StartupOption.ROLLBACK); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| |
| log("NameNode rollback with old layout version in previous", numDirs); |
| UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "current"); |
| baseDirs = UpgradeUtilities.createStorageDirs(NAME_NODE, nameNodeDirs, "previous"); |
| UpgradeUtilities.createVersionFile(NAME_NODE, baseDirs, |
| new StorageInfo(1, |
| UpgradeUtilities.getCurrentNamespaceID(null), |
| UpgradeUtilities.getCurrentFsscTime(null))); |
| startNameNodeShouldFail(StartupOption.UPGRADE); |
| UpgradeUtilities.createEmptyDirs(nameNodeDirs); |
| } // end numDir loop |
| } |
| |
| protected 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(); |
| } |
| |
| } |
| |
| |