TestBlockReaderLocalLegacy.java
/**
* 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.client.impl;
import static org.junit.jupiter.api.Assertions.assertArrayEquals;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertTrue;
import static org.junit.jupiter.api.Assumptions.assumeTrue;
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.DFSConfigKeys;
import org.apache.hadoop.hdfs.DFSInputStream;
import org.apache.hadoop.hdfs.DFSTestUtil;
import org.apache.hadoop.hdfs.DFSUtilClient;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.HdfsConfiguration;
import org.apache.hadoop.hdfs.MiniDFSCluster;
import org.apache.hadoop.hdfs.client.HdfsClientConfigKeys;
import org.apache.hadoop.hdfs.protocol.BlockLocalPathInfo;
import org.apache.hadoop.hdfs.protocol.ClientDatanodeProtocol;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
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.apache.hadoop.security.token.Token;
import org.apache.hadoop.test.GenericTestUtils;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.Test;
import org.junit.jupiter.api.Timeout;
public class TestBlockReaderLocalLegacy {
@BeforeAll
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(HdfsClientConfigKeys.Read.ShortCircuit.KEY, true);
conf.setBoolean(HdfsClientConfigKeys.DFS_CLIENT_USE_LEGACY_BLOCKREADERLOCAL, true);
conf.setBoolean(HdfsClientConfigKeys.Read.ShortCircuit.SKIP_CHECKSUM_KEY,
false);
conf.set(DFSConfigKeys.DFS_BLOCK_LOCAL_PATH_ACCESS_USER_KEY,
UserGroupInformation.getCurrentUser().getShortUserName());
conf.setBoolean(HdfsClientConfigKeys.DFS_CLIENT_DOMAIN_SOCKET_DATA_TRAFFIC, false);
// Set short retry timeouts so this test runs faster
conf.setInt(HdfsClientConfigKeys.Retry.WINDOW_BASE_KEY, 10);
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);
File basedir = new File(GenericTestUtils.getRandomizedTempPath());
MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf, basedir).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(REPL_FACTOR, blockFilesCorrupted, "All replicas not corrupted");
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;
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();
assertArrayEquals(orig, buf);
Arrays.equals(orig, buf);
cluster.shutdown();
}
@Test
@Timeout(value = 20)
public void testBlockReaderLocalLegacyWithAppend() throws Exception {
final short REPL_FACTOR = 1;
final HdfsConfiguration conf = getConfiguration(null);
conf.setBoolean(HdfsClientConfigKeys.DFS_CLIENT_USE_LEGACY_BLOCKREADERLOCAL, true);
File basedir = new File(GenericTestUtils.getRandomizedTempPath());
final MiniDFSCluster cluster =
new MiniDFSCluster.Builder(conf, basedir).numDataNodes(1).build();
cluster.waitActive();
final DistributedFileSystem dfs = cluster.getFileSystem();
final Path path = new Path("/testBlockReaderLocalLegacy");
DFSTestUtil.createFile(dfs, path, 10, REPL_FACTOR, 0);
DFSTestUtil.waitReplication(dfs, path, REPL_FACTOR);
final ClientDatanodeProtocol proxy;
final Token<BlockTokenIdentifier> token;
final ExtendedBlock originalBlock;
final long originalGS;
{
final LocatedBlock lb = cluster.getNameNode().getRpcServer()
.getBlockLocations(path.toString(), 0, 1).get(0);
proxy = DFSUtilClient.createClientDatanodeProtocolProxy(
lb.getLocations()[0], conf, 60000, false);
token = lb.getBlockToken();
// get block and generation stamp
final ExtendedBlock blk = new ExtendedBlock(lb.getBlock());
originalBlock = new ExtendedBlock(blk);
originalGS = originalBlock.getGenerationStamp();
// test getBlockLocalPathInfo
final BlockLocalPathInfo info = proxy.getBlockLocalPathInfo(blk, token);
assertEquals(originalGS, info.getBlock().getGenerationStamp());
}
{ // append one byte
FSDataOutputStream out = dfs.append(path);
out.write(1);
out.close();
}
{
// get new generation stamp
final LocatedBlock lb = cluster.getNameNode().getRpcServer()
.getBlockLocations(path.toString(), 0, 1).get(0);
final long newGS = lb.getBlock().getGenerationStamp();
assertTrue(newGS > originalGS);
// getBlockLocalPathInfo using the original block.
assertEquals(originalGS, originalBlock.getGenerationStamp());
final BlockLocalPathInfo info = proxy.getBlockLocalPathInfo(
originalBlock, token);
assertEquals(newGS, info.getBlock().getGenerationStamp());
}
cluster.shutdown();
}
}