| /** |
| * 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 java.io.*; |
| import java.util.*; |
| |
| import org.apache.hadoop.conf.Configuration; |
| import org.apache.hadoop.hdfs.StorageType; |
| import org.junit.Test; |
| |
| import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY; |
| import static org.hamcrest.CoreMatchers.is; |
| import static org.junit.Assert.*; |
| import static org.mockito.Mockito.*; |
| |
| import org.apache.hadoop.fs.LocalFileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.server.datanode.DataNode.DataNodeDiskChecker; |
| |
| public class TestDataDirs { |
| |
| @Test (timeout = 30000) |
| public void testDataDirParsing() throws Throwable { |
| Configuration conf = new Configuration(); |
| List<StorageLocation> locations; |
| File dir0 = new File("/dir0"); |
| File dir1 = new File("/dir1"); |
| File dir2 = new File("/dir2"); |
| File dir3 = new File("/dir3"); |
| |
| // Verify that a valid string is correctly parsed, and that storage |
| // type is not case-sensitive |
| String locations1 = "[disk]/dir0,[DISK]/dir1,[sSd]/dir2,[disK]/dir3"; |
| conf.set(DFS_DATANODE_DATA_DIR_KEY, locations1); |
| locations = DataNode.getStorageLocations(conf); |
| assertThat(locations.size(), is(4)); |
| assertThat(locations.get(0).getStorageType(), is(StorageType.DISK)); |
| assertThat(locations.get(0).getUri(), is(dir0.toURI())); |
| assertThat(locations.get(1).getStorageType(), is(StorageType.DISK)); |
| assertThat(locations.get(1).getUri(), is(dir1.toURI())); |
| assertThat(locations.get(2).getStorageType(), is(StorageType.SSD)); |
| assertThat(locations.get(2).getUri(), is(dir2.toURI())); |
| assertThat(locations.get(3).getStorageType(), is(StorageType.DISK)); |
| assertThat(locations.get(3).getUri(), is(dir3.toURI())); |
| |
| // Verify that an unrecognized storage type result in an exception. |
| String locations2 = "[BadMediaType]/dir0,[ssd]/dir1,[disk]/dir2"; |
| conf.set(DFS_DATANODE_DATA_DIR_KEY, locations2); |
| try { |
| locations = DataNode.getStorageLocations(conf); |
| fail(); |
| } catch(IllegalArgumentException iae) { |
| DataNode.LOG.info("The exception is expected.", iae); |
| } |
| |
| // Assert that a string with no storage type specified is |
| // correctly parsed and the default storage type is picked up. |
| String locations3 = "/dir0,/dir1"; |
| conf.set(DFS_DATANODE_DATA_DIR_KEY, locations3); |
| locations = DataNode.getStorageLocations(conf); |
| assertThat(locations.size(), is(2)); |
| assertThat(locations.get(0).getStorageType(), is(StorageType.DISK)); |
| assertThat(locations.get(0).getUri(), is(dir0.toURI())); |
| assertThat(locations.get(1).getStorageType(), is(StorageType.DISK)); |
| assertThat(locations.get(1).getUri(), is(dir1.toURI())); |
| } |
| |
| @Test (timeout = 30000) |
| public void testDataDirValidation() throws Throwable { |
| |
| DataNodeDiskChecker diskChecker = mock(DataNodeDiskChecker.class); |
| doThrow(new IOException()).doThrow(new IOException()).doNothing() |
| .when(diskChecker).checkDir(any(LocalFileSystem.class), any(Path.class)); |
| LocalFileSystem fs = mock(LocalFileSystem.class); |
| AbstractList<StorageLocation> locations = new ArrayList<StorageLocation>(); |
| |
| locations.add(StorageLocation.parse("file:/p1/")); |
| locations.add(StorageLocation.parse("file:/p2/")); |
| locations.add(StorageLocation.parse("file:/p3/")); |
| |
| List<StorageLocation> checkedLocations = |
| DataNode.checkStorageLocations(locations, fs, diskChecker); |
| assertEquals("number of valid data dirs", 1, checkedLocations.size()); |
| String validDir = checkedLocations.iterator().next().getFile().getPath(); |
| assertThat("p3 should be valid", new File("/p3/").getPath(), is(validDir)); |
| } |
| } |