| /** |
| * 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 org.apache.hadoop.fs.FileUtil; |
| import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption; |
| import org.apache.hadoop.hdfs.server.common.Storage; |
| import org.apache.hadoop.hdfs.server.protocol.NamespaceInfo; |
| import org.apache.hadoop.test.GenericTestUtils; |
| import org.junit.After; |
| import org.junit.Before; |
| import org.junit.Test; |
| import org.mockito.Mockito; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.net.URISyntaxException; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| import static org.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| import static org.junit.Assert.fail; |
| |
| public class TestDataStorage { |
| private final static String DEFAULT_BPID = "bp-0"; |
| private final static String CLUSTER_ID = "cluster0"; |
| private final static String BUILD_VERSION = "2.0"; |
| private final static String SOFTWARE_VERSION = "2.0"; |
| private final static long CTIME = 1; |
| private final static File TEST_DIR = |
| new File(System.getProperty("test.build.data") + "/dstest"); |
| private final static StartupOption START_OPT = StartupOption.REGULAR; |
| |
| private DataNode mockDN = Mockito.mock(DataNode.class); |
| private NamespaceInfo nsInfo; |
| private DataStorage storage; |
| |
| @Before |
| public void setUp() throws IOException { |
| storage = new DataStorage(); |
| nsInfo = new NamespaceInfo(0, CLUSTER_ID, DEFAULT_BPID, CTIME, |
| BUILD_VERSION, SOFTWARE_VERSION); |
| FileUtil.fullyDelete(TEST_DIR); |
| assertTrue("Failed to make test dir.", TEST_DIR.mkdirs()); |
| } |
| |
| @After |
| public void tearDown() throws IOException { |
| FileUtil.fullyDelete(TEST_DIR); |
| } |
| |
| private static List<StorageLocation> createStorageLocations(int numLocs) |
| throws IOException { |
| return createStorageLocations(numLocs, false); |
| } |
| |
| /** |
| * Create a list of StorageLocations. |
| * If asFile sets to true, create StorageLocation as regular files, otherwise |
| * create directories for each location. |
| * @param numLocs the total number of StorageLocations to be created. |
| * @param asFile set to true to create as file. |
| * @return a list of StorageLocations. |
| */ |
| private static List<StorageLocation> createStorageLocations( |
| int numLocs, boolean asFile) throws IOException { |
| List<StorageLocation> locations = new ArrayList<StorageLocation>(); |
| for (int i = 0; i < numLocs; i++) { |
| String uri = TEST_DIR + "/data" + i; |
| File file = new File(uri); |
| if (asFile) { |
| file.getParentFile().mkdirs(); |
| file.createNewFile(); |
| } else { |
| file.mkdirs(); |
| } |
| StorageLocation loc = StorageLocation.parse(uri); |
| locations.add(loc); |
| } |
| return locations; |
| } |
| |
| private static List<NamespaceInfo> createNamespaceInfos(int num) { |
| List<NamespaceInfo> nsInfos = new ArrayList<NamespaceInfo>(); |
| for (int i = 0; i < num; i++) { |
| String bpid = "bp-" + i; |
| nsInfos.add(new NamespaceInfo(0, CLUSTER_ID, bpid, CTIME, BUILD_VERSION, |
| SOFTWARE_VERSION)); |
| } |
| return nsInfos; |
| } |
| |
| /** Check whether the path is a valid DataNode data directory. */ |
| private static void checkDir(File dataDir) { |
| Storage.StorageDirectory sd = new Storage.StorageDirectory(dataDir); |
| assertTrue(sd.getRoot().isDirectory()); |
| assertTrue(sd.getCurrentDir().isDirectory()); |
| assertTrue(sd.getVersionFile().isFile()); |
| } |
| |
| /** Check whether the root is a valid BlockPoolSlice storage. */ |
| private static void checkDir(File root, String bpid) { |
| Storage.StorageDirectory sd = new Storage.StorageDirectory(root); |
| File bpRoot = new File(sd.getCurrentDir(), bpid); |
| Storage.StorageDirectory bpSd = new Storage.StorageDirectory(bpRoot); |
| assertTrue(bpSd.getRoot().isDirectory()); |
| assertTrue(bpSd.getCurrentDir().isDirectory()); |
| assertTrue(bpSd.getVersionFile().isFile()); |
| } |
| |
| @Test |
| public void testAddStorageDirectories() throws IOException, |
| URISyntaxException { |
| final int numLocations = 3; |
| final int numNamespace = 3; |
| List<StorageLocation> locations = createStorageLocations(numLocations); |
| |
| // Add volumes for multiple namespaces. |
| List<NamespaceInfo> namespaceInfos = createNamespaceInfos(numNamespace); |
| for (NamespaceInfo ni : namespaceInfos) { |
| storage.addStorageLocations(mockDN, ni, locations, START_OPT); |
| for (StorageLocation sl : locations) { |
| checkDir(sl.getFile()); |
| checkDir(sl.getFile(), ni.getBlockPoolID()); |
| } |
| } |
| |
| assertEquals(numLocations, storage.getNumStorageDirs()); |
| |
| locations = createStorageLocations(numLocations); |
| try { |
| storage.addStorageLocations(mockDN, namespaceInfos.get(0), |
| locations, START_OPT); |
| fail("Expected to throw IOException: adding active directories."); |
| } catch (IOException e) { |
| GenericTestUtils.assertExceptionContains( |
| "All specified directories are not accessible or do not exist.", e); |
| } |
| // The number of active storage dirs has not changed, since it tries to |
| // add the storage dirs that are under service. |
| assertEquals(numLocations, storage.getNumStorageDirs()); |
| |
| // Add more directories. |
| locations = createStorageLocations(6); |
| storage.addStorageLocations(mockDN, nsInfo, locations, START_OPT); |
| assertEquals(6, storage.getNumStorageDirs()); |
| } |
| |
| @Test |
| public void testRecoverTransitionReadFailure() throws IOException { |
| final int numLocations = 3; |
| List<StorageLocation> locations = |
| createStorageLocations(numLocations, true); |
| |
| try { |
| storage.recoverTransitionRead(mockDN, nsInfo, locations, START_OPT); |
| fail("An IOException should throw: all StorageLocations are NON_EXISTENT"); |
| } catch (IOException e) { |
| GenericTestUtils.assertExceptionContains( |
| "All specified directories are not accessible or do not exist.", e); |
| } |
| assertEquals(0, storage.getNumStorageDirs()); |
| } |
| |
| /** |
| * This test enforces the behavior that if there is an exception from |
| * doTransition() during DN starts up, the storage directories that have |
| * already been processed are still visible, i.e., in |
| * DataStorage.storageDirs(). |
| */ |
| @Test |
| public void testRecoverTransitionReadDoTransitionFailure() |
| throws IOException { |
| final int numLocations = 3; |
| List<StorageLocation> locations = createStorageLocations(numLocations); |
| String bpid = nsInfo.getBlockPoolID(); |
| // Prepare volumes |
| storage.recoverTransitionRead(mockDN, bpid, nsInfo, locations, START_OPT); |
| |
| // Reset DataStorage |
| storage.unlockAll(); |
| storage = new DataStorage(); |
| // Trigger an exception from doTransition(). |
| nsInfo.clusterID = "cluster1"; |
| try { |
| storage.recoverTransitionRead(mockDN, bpid, nsInfo, locations, START_OPT); |
| fail("Expect to throw an exception from doTransition()"); |
| } catch (IOException e) { |
| GenericTestUtils.assertExceptionContains("Incompatible clusterIDs", e); |
| } |
| assertEquals(numLocations, storage.getNumStorageDirs()); |
| } |
| } |