/**
* 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.File;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.Arrays;
import org.apache.hadoop.fs.ChecksumException;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FSDataOutputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.net.unix.DomainSocket;
import org.apache.hadoop.net.unix.TemporarySocketDirectory;
import org.apache.hadoop.security.UserGroupInformation;
import org.junit.Assert;
import org.junit.Assume;
import org.junit.BeforeClass;
import org.junit.Test;
public class TestBlockReaderLocalLegacy {
@BeforeClass
public static void setupCluster() throws IOException {
DFSInputStream.tcpReadsDisabledForTesting = true;
DomainSocket.disableBindPathValidation();
}
private static HdfsConfiguration getConfiguration(
TemporarySocketDirectory socketDir) throws IOException {
HdfsConfiguration conf = new HdfsConfiguration();
if (socketDir == null) {
conf.set(DFSConfigKeys.DFS_DOMAIN_SOCKET_PATH_KEY, "");
} else {
conf.set(DFSConfigKeys.DFS_DOMAIN_SOCKET_PATH_KEY,
new File(socketDir.getDir(), "TestBlockReaderLocalLegacy.%d.sock").
getAbsolutePath());
}
conf.setBoolean(DFSConfigKeys.DFS_CLIENT_READ_SHORTCIRCUIT_KEY, true);
conf.setBoolean(DFSConfigKeys.DFS_CLIENT_USE_LEGACY_BLOCKREADERLOCAL, 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());
conf.setBoolean(DFSConfigKeys.DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC, false);
return conf;
}
/**
* 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;
HdfsConfiguration conf = getConfiguration(null);
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
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());
cluster.shutdown();
}
@Test
public void testBothOldAndNewShortCircuitConfigured() throws Exception {
final short REPL_FACTOR = 1;
final int FILE_LENGTH = 512;
Assume.assumeTrue(null == DomainSocket.getLoadingFailureReason());
TemporarySocketDirectory socketDir = new TemporarySocketDirectory();
HdfsConfiguration conf = getConfiguration(socketDir);
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf).numDataNodes(1).build();
cluster.waitActive();
socketDir.close();
FileSystem fs = cluster.getFileSystem();
Path path = new Path("/foo");
byte orig[] = new byte[FILE_LENGTH];
for (int i = 0; i < orig.length; i++) {
orig[i] = (byte)(i%10);
}
FSDataOutputStream fos = fs.create(path, (short)1);
fos.write(orig);
fos.close();
DFSTestUtil.waitReplication(fs, path, REPL_FACTOR);
FSDataInputStream fis = cluster.getFileSystem().open(path);
byte buf[] = new byte[FILE_LENGTH];
IOUtils.readFully(fis, buf, 0, FILE_LENGTH);
fis.close();
Assert.assertArrayEquals(orig, buf);
Arrays.equals(orig, buf);
cluster.shutdown();
}
}