| /** |
| * 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 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.hdfs.server.common.HdfsConstants.NodeType; |
| import org.apache.hadoop.hdfs.server.common.HdfsConstants.StartupOption; |
| |
| import static org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType.NAME_NODE; |
| import static org.apache.hadoop.hdfs.server.common.HdfsConstants.NodeType.DATA_NODE; |
| |
| /** |
| * This test ensures the appropriate response (successful or failure) from |
| * the system when the system is started under various storage state and |
| * version conditions. |
| */ |
| public class TestDFSStorageStateRecovery extends TestCase { |
| |
| private static final Log LOG = LogFactory.getLog( |
| "org.apache.hadoop.hdfs.TestDFSStorageStateRecovery"); |
| private Configuration conf = null; |
| private int testCounter = 0; |
| private MiniDFSCluster cluster = null; |
| |
| /** |
| * The test case table. Each row represents a test case. This table is |
| * taken from the table in Apendix A of the HDFS Upgrade Test Plan |
| * (TestPlan-HdfsUpgrade.html) attached to |
| * http://issues.apache.org/jira/browse/HADOOP-702 |
| * The column meanings are: |
| * 0) current directory exists |
| * 1) previous directory exists |
| * 2) previous.tmp directory exists |
| * 3) removed.tmp directory exists |
| * 4) lastcheckpoint.tmp directory exists |
| * 5) node should recover and startup |
| * 6) current directory should exist after recovery but before startup |
| * 7) previous directory should exist after recovery but before startup |
| */ |
| static boolean[][] testCases = new boolean[][] { |
| new boolean[] {true, false, false, false, false, true, true, false}, // 1 |
| new boolean[] {true, true, false, false, false, true, true, true }, // 2 |
| new boolean[] {true, false, true, false, false, true, true, true }, // 3 |
| new boolean[] {true, true, true, true, false, false, false, false}, // 4 |
| new boolean[] {true, true, true, false, false, false, false, false}, // 4 |
| new boolean[] {false, true, true, true, false, false, false, false}, // 4 |
| new boolean[] {false, true, true, false, false, false, false, false}, // 4 |
| new boolean[] {false, false, false, false, false, false, false, false}, // 5 |
| new boolean[] {false, true, false, false, false, false, false, false}, // 6 |
| new boolean[] {false, false, true, false, false, true, true, false}, // 7 |
| new boolean[] {true, false, false, true, false, true, true, false}, // 8 |
| new boolean[] {true, true, false, true, false, false, false, false}, // 9 |
| new boolean[] {true, true, true, true, false, false, false, false}, // 10 |
| new boolean[] {true, false, true, true, false, false, false, false}, // 10 |
| new boolean[] {false, true, true, true, false, false, false, false}, // 10 |
| new boolean[] {false, false, true, true, false, false, false, false}, // 10 |
| new boolean[] {false, false, false, true, false, false, false, false}, // 11 |
| new boolean[] {false, true, false, true, false, true, true, true }, // 12 |
| // name-node specific cases |
| new boolean[] {true, false, false, false, true, true, true, false}, // 13 |
| new boolean[] {true, true, false, false, true, true, true, false}, // 13 |
| new boolean[] {false, false, false, false, true, true, true, false}, // 14 |
| new boolean[] {false, true, false, false, true, true, true, false}, // 14 |
| new boolean[] {true, false, true, false, true, false, false, false}, // 15 |
| new boolean[] {true, true, false, true, true, false, false, false} // 16 |
| }; |
| |
| private static final int NUM_NN_TEST_CASES = testCases.length; |
| private static final int NUM_DN_TEST_CASES = 18; |
| |
| /** |
| * Writes an INFO log message containing the parameters. Only |
| * the first 4 elements of the state array are included in the message. |
| */ |
| void log(String label, int numDirs, int testCaseNum, boolean[] state) { |
| LOG.info("============================================================"); |
| LOG.info("***TEST " + (testCounter++) + "*** " |
| + label + ":" |
| + " numDirs="+numDirs |
| + " testCase="+testCaseNum |
| + " current="+state[0] |
| + " previous="+state[1] |
| + " previous.tmp="+state[2] |
| + " removed.tmp="+state[3] |
| + " lastcheckpoint.tmp="+state[4]); |
| } |
| |
| /** |
| * Sets up the storage directories for the given node type, either |
| * dfs.name.dir or dfs.data.dir. For each element in dfs.name.dir or |
| * dfs.data.dir, the subdirectories represented by the first four elements |
| * of the <code>state</code> array will be created and populated. |
| * See UpgradeUtilities.createStorageDirs(). |
| * |
| * @param nodeType |
| * the type of node that storage should be created for. Based on this |
| * parameter either dfs.name.dir or dfs.data.dir is used from the global conf. |
| * @param state |
| * a row from the testCases table which indicates which directories |
| * to setup for the node |
| * @return file paths representing either dfs.name.dir or dfs.data.dir |
| * directories |
| */ |
| String[] createStorageState(NodeType nodeType, boolean[] state) throws Exception { |
| String[] baseDirs = (nodeType == NAME_NODE ? |
| conf.getStrings(DFSConfigKeys.DFS_NAMENODE_NAME_DIR_KEY) : |
| conf.getStrings(DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY)); |
| UpgradeUtilities.createEmptyDirs(baseDirs); |
| if (state[0]) // current |
| UpgradeUtilities.createStorageDirs(nodeType, baseDirs, "current"); |
| if (state[1]) // previous |
| UpgradeUtilities.createStorageDirs(nodeType, baseDirs, "previous"); |
| if (state[2]) // previous.tmp |
| UpgradeUtilities.createStorageDirs(nodeType, baseDirs, "previous.tmp"); |
| if (state[3]) // removed.tmp |
| UpgradeUtilities.createStorageDirs(nodeType, baseDirs, "removed.tmp"); |
| if (state[4]) // lastcheckpoint.tmp |
| UpgradeUtilities.createStorageDirs(nodeType, baseDirs, "lastcheckpoint.tmp"); |
| return baseDirs; |
| } |
| |
| /** |
| * Verify that the current and/or previous exist as indicated by |
| * the method parameters. If previous exists, verify that |
| * it hasn't been modified by comparing the checksum of all it's |
| * containing files with their original checksum. It is assumed that |
| * the server has recovered. |
| */ |
| void checkResult(NodeType nodeType, String[] baseDirs, |
| boolean currentShouldExist, boolean previousShouldExist) |
| throws IOException |
| { |
| switch (nodeType) { |
| case NAME_NODE: |
| if (currentShouldExist) { |
| 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: |
| if (currentShouldExist) { |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertEquals( |
| UpgradeUtilities.checksumContents( |
| nodeType, new File(baseDirs[i],"current")), |
| UpgradeUtilities.checksumMasterContents(nodeType)); |
| } |
| } |
| break; |
| } |
| if (previousShouldExist) { |
| for (int i = 0; i < baseDirs.length; i++) { |
| assertTrue(new File(baseDirs[i],"previous").isDirectory()); |
| assertEquals( |
| UpgradeUtilities.checksumContents( |
| nodeType, new File(baseDirs[i],"previous")), |
| UpgradeUtilities.checksumMasterContents(nodeType)); |
| } |
| } |
| } |
| |
| /** |
| * This test iterates over the testCases table and attempts |
| * to startup the NameNode normally. |
| */ |
| public void testNNStorageStates() throws Exception { |
| String[] baseDirs; |
| |
| for (int numDirs = 1; numDirs <= 2; numDirs++) { |
| conf = new HdfsConfiguration(); |
| conf.setInt("dfs.datanode.scan.period.hours", -1); |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs, conf); |
| for (int i = 0; i < NUM_NN_TEST_CASES; i++) { |
| boolean[] testCase = testCases[i]; |
| boolean shouldRecover = testCase[5]; |
| boolean curAfterRecover = testCase[6]; |
| boolean prevAfterRecover = testCase[7]; |
| |
| log("NAME_NODE recovery", numDirs, i, testCase); |
| baseDirs = createStorageState(NAME_NODE, testCase); |
| if (shouldRecover) { |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.REGULAR); |
| checkResult(NAME_NODE, baseDirs, curAfterRecover, prevAfterRecover); |
| cluster.shutdown(); |
| } else { |
| try { |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.REGULAR); |
| throw new AssertionError("NameNode should have failed to start"); |
| } catch (IOException expected) { |
| // the exception is expected |
| // check that the message says "not formatted" |
| // when storage directory is empty (case #5) |
| if(!testCases[i][0] && !testCases[i][2] |
| && !testCases[i][1] && !testCases[i][3] && !testCases[i][4]) { |
| assertTrue(expected.getLocalizedMessage().contains( |
| "NameNode is not formatted")); |
| } |
| } |
| } |
| cluster.shutdown(); |
| } // end testCases loop |
| } // end numDirs loop |
| } |
| |
| /** |
| * This test iterates over the testCases table and attempts |
| * to startup the DataNode normally. |
| */ |
| public void testDNStorageStates() throws Exception { |
| String[] baseDirs; |
| |
| for (int numDirs = 1; numDirs <= 2; numDirs++) { |
| conf = new HdfsConfiguration(); |
| conf.setInt("dfs.datanode.scan.period.hours", -1); |
| conf = UpgradeUtilities.initializeStorageStateConf(numDirs, conf); |
| for (int i = 0; i < NUM_DN_TEST_CASES; i++) { |
| boolean[] testCase = testCases[i]; |
| boolean shouldRecover = testCase[5]; |
| boolean curAfterRecover = testCase[6]; |
| boolean prevAfterRecover = testCase[7]; |
| |
| log("DATA_NODE recovery", numDirs, i, testCase); |
| createStorageState(NAME_NODE, |
| new boolean[] {true, true, false, false, false}); |
| cluster = new MiniDFSCluster(conf, 0, StartupOption.REGULAR); |
| baseDirs = createStorageState(DATA_NODE, testCase); |
| if (!testCase[0] && !testCase[1] && !testCase[2] && !testCase[3]) { |
| // DataNode will create and format current if no directories exist |
| cluster.startDataNodes(conf, 1, false, StartupOption.REGULAR, null); |
| } else { |
| if (shouldRecover) { |
| cluster.startDataNodes(conf, 1, false, StartupOption.REGULAR, null); |
| checkResult(DATA_NODE, baseDirs, curAfterRecover, prevAfterRecover); |
| } else { |
| try { |
| cluster.startDataNodes(conf, 1, false, StartupOption.REGULAR, null); |
| throw new AssertionError("DataNode should have failed to start"); |
| } catch (Exception expected) { |
| // expected |
| } |
| } |
| } |
| cluster.shutdown(); |
| } // end testCases loop |
| } // end numDirs loop |
| } |
| |
| protected void setUp() throws Exception { |
| LOG.info("Setting up the directory structures."); |
| UpgradeUtilities.initialize(); |
| } |
| |
| protected void tearDown() throws Exception { |
| LOG.info("Shutting down MiniDFSCluster"); |
| if (cluster != null) cluster.shutdown(); |
| } |
| |
| public static void main(String[] args) throws Exception { |
| TestDFSStorageStateRecovery test = new TestDFSStorageStateRecovery(); |
| test.testNNStorageStates(); |
| test.testDNStorageStates(); |
| } |
| |
| } |
| |
| |
