| /** |
| * 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.junit.Assert.assertEquals; |
| import static org.junit.Assert.assertTrue; |
| |
| import java.io.IOException; |
| import java.nio.ByteBuffer; |
| |
| import org.apache.hadoop.fs.ChecksumException; |
| import org.apache.hadoop.fs.FSDataInputStream; |
| import org.apache.hadoop.fs.FileSystem; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hadoop.hdfs.protocol.ExtendedBlock; |
| import org.apache.hadoop.security.UserGroupInformation; |
| import org.junit.AfterClass; |
| import org.junit.BeforeClass; |
| import org.junit.Test; |
| |
| public class TestBlockReaderLocal { |
| static MiniDFSCluster cluster; |
| static HdfsConfiguration conf; |
| |
| @BeforeClass |
| public static void setupCluster() throws IOException { |
| conf = new HdfsConfiguration(); |
| |
| conf.setBoolean(DFSConfigKeys.DFS_CLIENT_READ_SHORTCIRCUIT_KEY, true); |
| conf.setBoolean(DFSConfigKeys.DFS_CLIENT_READ_SHORTCIRCUIT_SKIP_CHECKSUM_KEY, |
| false); |
| conf.set(DFSConfigKeys.DFS_BLOCK_LOCAL_PATH_ACCESS_USER_KEY, |
| UserGroupInformation.getCurrentUser().getShortUserName()); |
| |
| cluster = new MiniDFSCluster.Builder(conf).numDataNodes(1).build(); |
| } |
| |
| @AfterClass |
| public static void teardownCluster() { |
| cluster.shutdown(); |
| } |
| |
| /** |
| * Test that, in the case of an error, the position and limit of a ByteBuffer |
| * are left unchanged. This is not mandated by ByteBufferReadable, but clients |
| * of this class might immediately issue a retry on failure, so it's polite. |
| */ |
| @Test |
| public void testStablePositionAfterCorruptRead() throws Exception { |
| final short REPL_FACTOR = 1; |
| final long FILE_LENGTH = 512L; |
| cluster.waitActive(); |
| FileSystem fs = cluster.getFileSystem(); |
| |
| Path path = new Path("/corrupted"); |
| |
| DFSTestUtil.createFile(fs, path, FILE_LENGTH, REPL_FACTOR, 12345L); |
| DFSTestUtil.waitReplication(fs, path, REPL_FACTOR); |
| |
| ExtendedBlock block = DFSTestUtil.getFirstBlock(fs, path); |
| int blockFilesCorrupted = cluster.corruptBlockOnDataNodes(block); |
| assertEquals("All replicas not corrupted", REPL_FACTOR, blockFilesCorrupted); |
| |
| FSDataInputStream dis = cluster.getFileSystem().open(path); |
| ByteBuffer buf = ByteBuffer.allocateDirect((int)FILE_LENGTH); |
| boolean sawException = false; |
| try { |
| dis.read(buf); |
| } catch (ChecksumException ex) { |
| sawException = true; |
| } |
| |
| assertTrue(sawException); |
| assertEquals(0, buf.position()); |
| assertEquals(buf.capacity(), buf.limit()); |
| |
| dis = cluster.getFileSystem().open(path); |
| buf.position(3); |
| buf.limit(25); |
| sawException = false; |
| try { |
| dis.read(buf); |
| } catch (ChecksumException ex) { |
| sawException = true; |
| } |
| |
| assertTrue(sawException); |
| assertEquals(3, buf.position()); |
| assertEquals(25, buf.limit()); |
| } |
| } |