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HDFS-2129. Simplify BlockReader to not inherit from FSInputChecker. Contributed by Todd Lipcon. 

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/trunk@1196976 13f79535-47bb-0310-9956-ffa450edef68
This commit is contained in:
Todd Lipcon 2011-11-03 06:54:59 +00:00
parent 5d5e2df9d3
commit 40fe96546f
23 changed files with 842 additions and 126 deletions
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3
hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt
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@ -108,6 +108,9 @@ Release 0.23.1 - UNRELEASED
HDFS-2533. Remove needless synchronization on some FSDataSet methods.
(todd)
HDFS-2129. Simplify BlockReader to not inherit from FSInputChecker.
(todd)
BUG FIXES
Release 0.23.0 - 2011-11-01

24
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/BlockReader.java
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@ -20,14 +20,11 @@ package org.apache.hadoop.hdfs;
import java.io.IOException;
import java.net.Socket;
import org.apache.hadoop.fs.PositionedReadable;
import org.apache.hadoop.fs.Seekable;
/**
* A BlockReader is responsible for reading a single block
* from a single datanode.
*/
public interface BlockReader extends Seekable, PositionedReadable {
public interface BlockReader {
/* same interface as inputStream java.io.InputStream#read()
* used by DFSInputStream#read()
@ -43,16 +40,21 @@ public interface BlockReader extends Seekable, PositionedReadable {
*/
long skip(long n) throws IOException;
/**
* Read a single byte, returning -1 at enf of stream.
*/
int read() throws IOException;
void close() throws IOException;
/**
* kind of like readFully(). Only reads as much as possible.
* And allows use of protected readFully().
* Read exactly the given amount of data, throwing an exception
* if EOF is reached before that amount
*/
void readFully(byte[] buf, int readOffset, int amtToRead) throws IOException;
/**
* Similar to {@link #readFully(byte[], int, int)} except that it will
* not throw an exception on EOF. However, it differs from the simple
* {@link #read(byte[], int, int)} call in that it is guaranteed to
* read the data if it is available. In other words, if this call
* does not throw an exception, then either the buffer has been
* filled or the next call will return EOF.
*/
int readAll(byte[] buf, int offset, int len) throws IOException;

30
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/BlockReaderFactory.java
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@ -22,6 +22,8 @@ import java.net.InetSocketAddress;
import java.net.Socket;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hdfs.DFSClient.Conf;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
import org.apache.hadoop.security.token.Token;
@ -32,17 +34,26 @@ import org.apache.hadoop.security.token.Token;
*/
@InterfaceAudience.Private
public class BlockReaderFactory {
public static BlockReader newBlockReader(Socket sock, String file,
/**
* @see #newBlockReader(Conf, Socket, String, ExtendedBlock, Token, long, long, int, boolean, String)
*/
public static BlockReader newBlockReader(
Configuration conf,
Socket sock, String file,
ExtendedBlock block, Token<BlockTokenIdentifier> blockToken,
long startOffset, long len, int bufferSize) throws IOException {
return newBlockReader(sock, file, block, blockToken, startOffset,
long startOffset, long len) throws IOException {
int bufferSize = conf.getInt(DFSConfigKeys.IO_FILE_BUFFER_SIZE_KEY,
DFSConfigKeys.IO_FILE_BUFFER_SIZE_DEFAULT);
return newBlockReader(new Conf(conf),
sock, file, block, blockToken, startOffset,
len, bufferSize, true, "");
}
/**
* Create a new BlockReader specifically to satisfy a read.
* This method also sends the OP_READ_BLOCK request.
*
*
* @param conf the DFSClient configuration
* @param sock An established Socket to the DN. The BlockReader will not close it normally
* @param file File location
* @param block The block object
@ -54,7 +65,9 @@ public class BlockReaderFactory {
* @param clientName Client name
* @return New BlockReader instance, or null on error.
*/
@SuppressWarnings("deprecation")
public static BlockReader newBlockReader(
Conf conf,
Socket sock, String file,
ExtendedBlock block,
Token<BlockTokenIdentifier> blockToken,
@ -62,8 +75,13 @@ public class BlockReaderFactory {
int bufferSize, boolean verifyChecksum,
String clientName)
throws IOException {
return RemoteBlockReader.newBlockReader(
sock, file, block, blockToken, startOffset, len, bufferSize, verifyChecksum, clientName);
if (conf.useLegacyBlockReader) {
return RemoteBlockReader.newBlockReader(
sock, file, block, blockToken, startOffset, len, bufferSize, verifyChecksum, clientName);
} else {
return RemoteBlockReader2.newBlockReader(
sock, file, block, blockToken, startOffset, len, bufferSize, verifyChecksum, clientName);
}
}
/**

4
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSClient.java
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@ -155,6 +155,7 @@ public class DFSClient implements java.io.Closeable {
final short defaultReplication;
final String taskId;
final FsPermission uMask;
final boolean useLegacyBlockReader;
Conf(Configuration conf) {
maxBlockAcquireFailures = conf.getInt(
@ -192,6 +193,9 @@ public class DFSClient implements java.io.Closeable {
.getInt(DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_KEY,
DFS_CLIENT_BLOCK_WRITE_LOCATEFOLLOWINGBLOCK_RETRIES_DEFAULT);
uMask = FsPermission.getUMask(conf);
useLegacyBlockReader = conf.getBoolean(
DFS_CLIENT_USE_LEGACY_BLOCKREADER,
DFS_CLIENT_USE_LEGACY_BLOCKREADER_DEFAULT);
}
private int getChecksumType(Configuration conf) {

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSConfigKeys.java
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@ -181,6 +181,8 @@ public class DFSConfigKeys extends CommonConfigurationKeys {
public static final int DFS_CLIENT_BLOCK_WRITE_RETRIES_DEFAULT = 3;
public static final String DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_KEY = "dfs.client.max.block.acquire.failures";
public static final int DFS_CLIENT_MAX_BLOCK_ACQUIRE_FAILURES_DEFAULT = 3;
public static final String DFS_CLIENT_USE_LEGACY_BLOCKREADER = "dfs.client.use.legacy.blockreader";
public static final boolean DFS_CLIENT_USE_LEGACY_BLOCKREADER_DEFAULT = false;
public static final String DFS_BALANCER_MOVEDWINWIDTH_KEY = "dfs.balancer.movedWinWidth";
public static final long DFS_BALANCER_MOVEDWINWIDTH_DEFAULT = 5400*1000L;
public static final String DFS_DATANODE_ADDRESS_KEY = "dfs.datanode.address";

3
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/DFSInputStream.java
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@ -780,7 +780,8 @@ public class DFSInputStream extends FSInputStream {
try {
// The OP_READ_BLOCK request is sent as we make the BlockReader
BlockReader reader =
BlockReaderFactory.newBlockReader(sock, file, block,
BlockReaderFactory.newBlockReader(dfsClient.getConf(),
sock, file, block,
blockToken,
startOffset, len,
bufferSize, verifyChecksum,

64
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/RemoteBlockReader.java
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@ -50,27 +50,13 @@ import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.util.DataChecksum;
/** This is a wrapper around connection to datanode
* and understands checksum, offset etc.
*
* Terminology:
* <dl>
* <dt>block</dt>
* <dd>The hdfs block, typically large (~64MB).
* </dd>
* <dt>chunk</dt>
* <dd>A block is divided into chunks, each comes with a checksum.
* We want transfers to be chunk-aligned, to be able to
* verify checksums.
* </dd>
* <dt>packet</dt>
* <dd>A grouping of chunks used for transport. It contains a
* header, followed by checksum data, followed by real data.
* </dd>
* </dl>
* Please see DataNode for the RPC specification.
/**
* @deprecated this is an old implementation that is being left around
* in case any issues spring up with the new {@link RemoteBlockReader2} implementation.
* It will be removed in the next release.
*/
@InterfaceAudience.Private
@Deprecated
public class RemoteBlockReader extends FSInputChecker implements BlockReader {
Socket dnSock; //for now just sending the status code (e.g. checksumOk) after the read.
@ -410,7 +396,7 @@ public class RemoteBlockReader extends FSInputChecker implements BlockReader {
BlockOpResponseProto status = BlockOpResponseProto.parseFrom(
vintPrefixed(in));
checkSuccess(status, sock, block, file);
RemoteBlockReader2.checkSuccess(status, sock, block, file);
ReadOpChecksumInfoProto checksumInfo =
status.getReadOpChecksumInfo();
DataChecksum checksum = DataTransferProtoUtil.fromProto(
@ -431,28 +417,6 @@ public class RemoteBlockReader extends FSInputChecker implements BlockReader {
in, checksum, verifyChecksum, startOffset, firstChunkOffset, len, sock);
}
private static void checkSuccess(
BlockOpResponseProto status, Socket sock,
ExtendedBlock block, String file)
throws IOException {
if (status.getStatus() != Status.SUCCESS) {
if (status.getStatus() == Status.ERROR_ACCESS_TOKEN) {
throw new InvalidBlockTokenException(
"Got access token error for OP_READ_BLOCK, self="
+ sock.getLocalSocketAddress() + ", remote="
+ sock.getRemoteSocketAddress() + ", for file " + file
+ ", for pool " + block.getBlockPoolId() + " block "
+ block.getBlockId() + "_" + block.getGenerationStamp());
} else {
throw new IOException("Got error for OP_READ_BLOCK, self="
+ sock.getLocalSocketAddress() + ", remote="
+ sock.getRemoteSocketAddress() + ", for file " + file
+ ", for pool " + block.getBlockPoolId() + " block "
+ block.getBlockId() + "_" + block.getGenerationStamp());
}
}
}
@Override
public synchronized void close() throws IOException {
startOffset = -1;
@ -464,6 +428,12 @@ public class RemoteBlockReader extends FSInputChecker implements BlockReader {
// in will be closed when its Socket is closed.
}
@Override
public void readFully(byte[] buf, int readOffset, int amtToRead)
throws IOException {
IOUtils.readFully(this, buf, readOffset, amtToRead);
}
@Override
public int readAll(byte[] buf, int offset, int len) throws IOException {
return readFully(this, buf, offset, len);
@ -492,14 +462,7 @@ public class RemoteBlockReader extends FSInputChecker implements BlockReader {
void sendReadResult(Socket sock, Status statusCode) {
assert !sentStatusCode : "already sent status code to " + sock;
try {
OutputStream out = NetUtils.getOutputStream(sock, HdfsServerConstants.WRITE_TIMEOUT);
ClientReadStatusProto.newBuilder()
.setStatus(statusCode)
.build()
.writeDelimitedTo(out);
out.flush();
RemoteBlockReader2.writeReadResult(sock, statusCode);
sentStatusCode = true;
} catch (IOException e) {
// It's ok not to be able to send this. But something is probably wrong.
@ -519,4 +482,5 @@ public class RemoteBlockReader extends FSInputChecker implements BlockReader {
final String poolId, final long blockId) {
return s.toString() + ":" + poolId + ":" + blockId;
}
}

500
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/RemoteBlockReader2.java Normal file
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@ -0,0 +1,500 @@
/**
* 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.apache.hadoop.hdfs.protocol.HdfsProtoUtil.vintPrefixed;
import java.io.BufferedOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetSocketAddress;
import java.net.Socket;
import java.nio.ByteBuffer;
import java.nio.channels.ReadableByteChannel;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.fs.ChecksumException;
import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
import org.apache.hadoop.hdfs.protocol.datatransfer.DataTransferProtoUtil;
import org.apache.hadoop.hdfs.protocol.datatransfer.PacketHeader;
import org.apache.hadoop.hdfs.protocol.datatransfer.Sender;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.BlockOpResponseProto;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ClientReadStatusProto;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.ReadOpChecksumInfoProto;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.Status;
import org.apache.hadoop.hdfs.security.token.block.BlockTokenIdentifier;
import org.apache.hadoop.hdfs.security.token.block.InvalidBlockTokenException;
import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
import org.apache.hadoop.hdfs.util.DirectBufferPool;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.net.SocketInputStream;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.util.DataChecksum;
import com.google.common.base.Preconditions;
/**
* This is a wrapper around connection to datanode
* and understands checksum, offset etc.
*
* Terminology:
* <dl>
* <dt>block</dt>
* <dd>The hdfs block, typically large (~64MB).
* </dd>
* <dt>chunk</dt>
* <dd>A block is divided into chunks, each comes with a checksum.
* We want transfers to be chunk-aligned, to be able to
* verify checksums.
* </dd>
* <dt>packet</dt>
* <dd>A grouping of chunks used for transport. It contains a
* header, followed by checksum data, followed by real data.
* </dd>
* </dl>
* Please see DataNode for the RPC specification.
*
* This is a new implementation introduced in Hadoop 0.23 which
* is more efficient and simpler than the older BlockReader
* implementation. It should be renamed to RemoteBlockReader
* once we are confident in it.
*/
@InterfaceAudience.Private
public class RemoteBlockReader2 implements BlockReader {
static final Log LOG = LogFactory.getLog(RemoteBlockReader2.class);
Socket dnSock; //for now just sending the status code (e.g. checksumOk) after the read.
private ReadableByteChannel in;
private DataChecksum checksum;
private PacketHeader curHeader;
private ByteBuffer curPacketBuf = null;
private ByteBuffer curDataSlice = null;
/** offset in block of the last chunk received */
private long lastSeqNo = -1;
/** offset in block where reader wants to actually read */
private long startOffset;
private final String filename;
private static DirectBufferPool bufferPool =
new DirectBufferPool();
private ByteBuffer headerBuf = ByteBuffer.allocate(
PacketHeader.PKT_HEADER_LEN);
private int bytesPerChecksum;
private int checksumSize;
/**
* The total number of bytes we need to transfer from the DN.
* This is the amount that the user has requested plus some padding
* at the beginning so that the read can begin on a chunk boundary.
*/
private long bytesNeededToFinish;
private final boolean verifyChecksum;
private boolean sentStatusCode = false;
byte[] skipBuf = null;
ByteBuffer checksumBytes = null;
/** Amount of unread data in the current received packet */
int dataLeft = 0;
@Override
public synchronized int read(byte[] buf, int off, int len)
throws IOException {
if (curPacketBuf == null || curDataSlice.remaining() == 0 && bytesNeededToFinish > 0) {
readNextPacket();
}
if (curDataSlice.remaining() == 0) {
// we're at EOF now
return -1;
}
int nRead = Math.min(curDataSlice.remaining(), len);
curDataSlice.get(buf, off, nRead);
return nRead;
}
private void readNextPacket() throws IOException {
Preconditions.checkState(curHeader == null || !curHeader.isLastPacketInBlock());
//Read packet headers.
readPacketHeader();
if (LOG.isTraceEnabled()) {
LOG.trace("DFSClient readNextPacket got header " + curHeader);
}
// Sanity check the lengths
if (!curHeader.sanityCheck(lastSeqNo)) {
throw new IOException("BlockReader: error in packet header " +
curHeader);
}
if (curHeader.getDataLen() > 0) {
int chunks = 1 + (curHeader.getDataLen() - 1) / bytesPerChecksum;
int checksumsLen = chunks * checksumSize;
int bufsize = checksumsLen + curHeader.getDataLen();
resetPacketBuffer(checksumsLen, curHeader.getDataLen());
lastSeqNo = curHeader.getSeqno();
if (bufsize > 0) {
readChannelFully(in, curPacketBuf);
curPacketBuf.flip();
if (verifyChecksum) {
verifyPacketChecksums();
}
}
bytesNeededToFinish -= curHeader.getDataLen();
}
// First packet will include some data prior to the first byte
// the user requested. Skip it.
if (curHeader.getOffsetInBlock() < startOffset) {
int newPos = (int) (startOffset - curHeader.getOffsetInBlock());
curDataSlice.position(newPos);
}
// If we've now satisfied the whole client read, read one last packet
// header, which should be empty
if (bytesNeededToFinish <= 0) {
readTrailingEmptyPacket();
if (verifyChecksum) {
sendReadResult(dnSock, Status.CHECKSUM_OK);
} else {
sendReadResult(dnSock, Status.SUCCESS);
}
}
}
private void verifyPacketChecksums() throws ChecksumException {
// N.B.: the checksum error offset reported here is actually
// relative to the start of the block, not the start of the file.
// This is slightly misleading, but preserves the behavior from
// the older BlockReader.
checksum.verifyChunkedSums(curDataSlice, curPacketBuf,
filename, curHeader.getOffsetInBlock());
}
private static void readChannelFully(ReadableByteChannel ch, ByteBuffer buf)
throws IOException {
while (buf.remaining() > 0) {
int n = ch.read(buf);
if (n < 0) {
throw new IOException("Premature EOF reading from " + ch);
}
}
}
private void resetPacketBuffer(int checksumsLen, int dataLen) {
int packetLen = checksumsLen + dataLen;
if (curPacketBuf == null ||
curPacketBuf.capacity() < packetLen) {
returnPacketBufToPool();
curPacketBuf = bufferPool.getBuffer(packetLen);
}
curPacketBuf.position(checksumsLen);
curDataSlice = curPacketBuf.slice();
curDataSlice.limit(dataLen);
curPacketBuf.clear();
curPacketBuf.limit(checksumsLen + dataLen);
}
@Override
public synchronized long skip(long n) throws IOException {
/* How can we make sure we don't throw a ChecksumException, at least
* in majority of the cases?. This one throws. */
if ( skipBuf == null ) {
skipBuf = new byte[bytesPerChecksum];
}
long nSkipped = 0;
while ( nSkipped < n ) {
int toSkip = (int)Math.min(n-nSkipped, skipBuf.length);
int ret = read(skipBuf, 0, toSkip);
if ( ret <= 0 ) {
return nSkipped;
}
nSkipped += ret;
}
return nSkipped;
}
private void readPacketHeader() throws IOException {
headerBuf.clear();
readChannelFully(in, headerBuf);
headerBuf.flip();
if (curHeader == null) curHeader = new PacketHeader();
curHeader.readFields(headerBuf);
}
private void readTrailingEmptyPacket() throws IOException {
if (LOG.isTraceEnabled()) {
LOG.trace("Reading empty packet at end of read");
}
headerBuf.clear();
readChannelFully(in, headerBuf);
headerBuf.flip();
PacketHeader trailer = new PacketHeader();
trailer.readFields(headerBuf);
if (!trailer.isLastPacketInBlock() ||
trailer.getDataLen() != 0) {
throw new IOException("Expected empty end-of-read packet! Header: " +
trailer);
}
}
private RemoteBlockReader2(String file, String bpid, long blockId,
ReadableByteChannel in, DataChecksum checksum, boolean verifyChecksum,
long startOffset, long firstChunkOffset, long bytesToRead, Socket dnSock) {
// Path is used only for printing block and file information in debug
this.dnSock = dnSock;
this.in = in;
this.checksum = checksum;
this.verifyChecksum = verifyChecksum;
this.startOffset = Math.max( startOffset, 0 );
this.filename = file;
// The total number of bytes that we need to transfer from the DN is
// the amount that the user wants (bytesToRead), plus the padding at
// the beginning in order to chunk-align. Note that the DN may elect
// to send more than this amount if the read starts/ends mid-chunk.
this.bytesNeededToFinish = bytesToRead + (startOffset - firstChunkOffset);
bytesPerChecksum = this.checksum.getBytesPerChecksum();
checksumSize = this.checksum.getChecksumSize();
}
@Override
public synchronized void close() throws IOException {
returnPacketBufToPool();
startOffset = -1;
checksum = null;
if (dnSock != null) {
dnSock.close();
}
// in will be closed when its Socket is closed.
}
@Override
protected void finalize() throws Throwable {
try {
// just in case it didn't get closed, we
// may as well still try to return the buffer
returnPacketBufToPool();
} finally {
super.finalize();
}
}
private void returnPacketBufToPool() {
if (curPacketBuf != null) {
bufferPool.returnBuffer(curPacketBuf);
curPacketBuf = null;
}
}
/**
* Take the socket used to talk to the DN.
*/
public Socket takeSocket() {
assert hasSentStatusCode() :
"BlockReader shouldn't give back sockets mid-read";
Socket res = dnSock;
dnSock = null;
return res;
}
/**
* Whether the BlockReader has reached the end of its input stream
* and successfully sent a status code back to the datanode.
*/
public boolean hasSentStatusCode() {
return sentStatusCode;
}
/**
* When the reader reaches end of the read, it sends a status response
* (e.g. CHECKSUM_OK) to the DN. Failure to do so could lead to the DN
* closing our connection (which we will re-open), but won't affect
* data correctness.
*/
void sendReadResult(Socket sock, Status statusCode) {
assert !sentStatusCode : "already sent status code to " + sock;
try {
writeReadResult(sock, statusCode);
sentStatusCode = true;
} catch (IOException e) {
// It's ok not to be able to send this. But something is probably wrong.
LOG.info("Could not send read status (" + statusCode + ") to datanode " +
sock.getInetAddress() + ": " + e.getMessage());
}
}
/**
* Serialize the actual read result on the wire.
*/
static void writeReadResult(Socket sock, Status statusCode)
throws IOException {
OutputStream out = NetUtils.getOutputStream(sock, HdfsServerConstants.WRITE_TIMEOUT);
ClientReadStatusProto.newBuilder()
.setStatus(statusCode)
.build()
.writeDelimitedTo(out);
out.flush();
}
/**
* File name to print when accessing a block directly (from servlets)
* @param s Address of the block location
* @param poolId Block pool ID of the block
* @param blockId Block ID of the block
* @return string that has a file name for debug purposes
*/
public static String getFileName(final InetSocketAddress s,
final String poolId, final long blockId) {
return s.toString() + ":" + poolId + ":" + blockId;
}
@Override
public int readAll(byte[] buf, int offset, int len) throws IOException {
int n = 0;
for (;;) {
int nread = read(buf, offset + n, len - n);
if (nread <= 0)
return (n == 0) ? nread : n;
n += nread;
if (n >= len)
return n;
}
}
@Override
public void readFully(byte[] buf, int off, int len)
throws IOException {
int toRead = len;
while (toRead > 0) {
int ret = read(buf, off, toRead);
if (ret < 0) {
throw new IOException("Premature EOF from inputStream");
}
toRead -= ret;
off += ret;
}
}
/**
* Create a new BlockReader specifically to satisfy a read.
* This method also sends the OP_READ_BLOCK request.
*
* @param sock An established Socket to the DN. The BlockReader will not close it normally.
* This socket must have an associated Channel.
* @param file File location
* @param block The block object
* @param blockToken The block token for security
* @param startOffset The read offset, relative to block head
* @param len The number of bytes to read
* @param bufferSize The IO buffer size (not the client buffer size)
* @param verifyChecksum Whether to verify checksum
* @param clientName Client name
* @return New BlockReader instance, or null on error.
*/
public static BlockReader newBlockReader( Socket sock, String file,
ExtendedBlock block,
Token<BlockTokenIdentifier> blockToken,
long startOffset, long len,
int bufferSize, boolean verifyChecksum,
String clientName)
throws IOException {
// in and out will be closed when sock is closed (by the caller)
final DataOutputStream out = new DataOutputStream(new BufferedOutputStream(
NetUtils.getOutputStream(sock,
HdfsServerConstants.WRITE_TIMEOUT)));
new Sender(out).readBlock(block, blockToken, clientName, startOffset, len);
//
// Get bytes in block, set streams
//
Preconditions.checkArgument(sock.getChannel() != null,
"Socket %s does not have an associated Channel.",
sock);
SocketInputStream sin =
(SocketInputStream)NetUtils.getInputStream(sock);
DataInputStream in = new DataInputStream(sin);
BlockOpResponseProto status = BlockOpResponseProto.parseFrom(
vintPrefixed(in));
checkSuccess(status, sock, block, file);
ReadOpChecksumInfoProto checksumInfo =
status.getReadOpChecksumInfo();
DataChecksum checksum = DataTransferProtoUtil.fromProto(
checksumInfo.getChecksum());
//Warning when we get CHECKSUM_NULL?
// Read the first chunk offset.
long firstChunkOffset = checksumInfo.getChunkOffset();
if ( firstChunkOffset < 0 || firstChunkOffset > startOffset ||
firstChunkOffset >= (startOffset + checksum.getBytesPerChecksum())) {
throw new IOException("BlockReader: error in first chunk offset (" +
firstChunkOffset + ") startOffset is " +
startOffset + " for file " + file);
}
return new RemoteBlockReader2(file, block.getBlockPoolId(), block.getBlockId(),
sin, checksum, verifyChecksum, startOffset, firstChunkOffset, len, sock);
}
static void checkSuccess(
BlockOpResponseProto status, Socket sock,
ExtendedBlock block, String file)
throws IOException {
if (status.getStatus() != Status.SUCCESS) {
if (status.getStatus() == Status.ERROR_ACCESS_TOKEN) {
throw new InvalidBlockTokenException(
"Got access token error for OP_READ_BLOCK, self="
+ sock.getLocalSocketAddress() + ", remote="
+ sock.getRemoteSocketAddress() + ", for file " + file
+ ", for pool " + block.getBlockPoolId() + " block "
+ block.getBlockId() + "_" + block.getGenerationStamp());
} else {
throw new IOException("Got error for OP_READ_BLOCK, self="
+ sock.getLocalSocketAddress() + ", remote="
+ sock.getRemoteSocketAddress() + ", for file " + file
+ ", for pool " + block.getBlockPoolId() + " block "
+ block.getBlockId() + "_" + block.getGenerationStamp());
}
}
}
}

2
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/protocol/datatransfer/PacketHeader.java
View File

@ -136,7 +136,7 @@ public class PacketHeader {
*/
public boolean sanityCheck(long lastSeqNo) {
// We should only have a non-positive data length for the last packet
if (proto.getDataLen() <= 0 && proto.getLastPacketInBlock()) return false;
if (proto.getDataLen() <= 0 && !proto.getLastPacketInBlock()) return false;
// The last packet should not contain data
if (proto.getLastPacketInBlock() && proto.getDataLen() != 0) return false;
// Seqnos should always increase by 1 with each packet received

32
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/common/JspHelper.java
View File

@ -58,6 +58,7 @@ import org.apache.hadoop.hdfs.server.namenode.NameNodeHttpServer;
import org.apache.hadoop.hdfs.web.resources.DelegationParam;
import org.apache.hadoop.hdfs.web.resources.UserParam;
import org.apache.hadoop.http.HtmlQuoting;
import org.apache.hadoop.io.IOUtils;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.net.NetUtils;
import org.apache.hadoop.security.AccessControlException;
@ -117,7 +118,8 @@ public class JspHelper {
return 0;
}
}
public static DatanodeInfo bestNode(LocatedBlocks blks) throws IOException {
public static DatanodeInfo bestNode(LocatedBlocks blks, Configuration conf)
throws IOException {
HashMap<DatanodeInfo, NodeRecord> map =
new HashMap<DatanodeInfo, NodeRecord>();
for (LocatedBlock block : blks.getLocatedBlocks()) {
@ -133,16 +135,17 @@ public class JspHelper {
}
NodeRecord[] nodes = map.values().toArray(new NodeRecord[map.size()]);
Arrays.sort(nodes, new NodeRecordComparator());
return bestNode(nodes, false);
return bestNode(nodes, false, conf);
}
public static DatanodeInfo bestNode(LocatedBlock blk) throws IOException {
public static DatanodeInfo bestNode(LocatedBlock blk, Configuration conf)
throws IOException {
DatanodeInfo[] nodes = blk.getLocations();
return bestNode(nodes, true);
return bestNode(nodes, true, conf);
}
public static DatanodeInfo bestNode(DatanodeInfo[] nodes, boolean doRandom)
throws IOException {
public static DatanodeInfo bestNode(DatanodeInfo[] nodes, boolean doRandom,
Configuration conf) throws IOException {
TreeSet<DatanodeInfo> deadNodes = new TreeSet<DatanodeInfo>();
DatanodeInfo chosenNode = null;
int failures = 0;
@ -169,7 +172,7 @@ public class JspHelper {
chosenNode.getHost() + ":" + chosenNode.getInfoPort());
try {
s = new Socket();
s = NetUtils.getDefaultSocketFactory(conf).createSocket();
s.connect(targetAddr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
} catch (IOException e) {
@ -191,27 +194,26 @@ public class JspHelper {
long blockSize, long offsetIntoBlock, long chunkSizeToView,
JspWriter out, Configuration conf) throws IOException {
if (chunkSizeToView == 0) return;
Socket s = new Socket();
Socket s = NetUtils.getDefaultSocketFactory(conf).createSocket();
s.connect(addr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
long amtToRead = Math.min(chunkSizeToView, blockSize - offsetIntoBlock);
int amtToRead = (int)Math.min(chunkSizeToView, blockSize - offsetIntoBlock);
// Use the block name for file name.
int bufferSize = conf.getInt(DFSConfigKeys.IO_FILE_BUFFER_SIZE_KEY,
DFSConfigKeys.IO_FILE_BUFFER_SIZE_DEFAULT);
String file = BlockReaderFactory.getFileName(addr, poolId, blockId);
BlockReader blockReader = BlockReaderFactory.newBlockReader(s, file,
BlockReader blockReader = BlockReaderFactory.newBlockReader(
conf, s, file,
new ExtendedBlock(poolId, blockId, 0, genStamp), blockToken,
offsetIntoBlock, amtToRead, bufferSize);
offsetIntoBlock, amtToRead);
byte[] buf = new byte[(int)amtToRead];
int readOffset = 0;
int retries = 2;
while ( amtToRead > 0 ) {
int numRead;
int numRead = amtToRead;
try {
numRead = blockReader.readAll(buf, readOffset, (int)amtToRead);
blockReader.readFully(buf, readOffset, amtToRead);
}
catch (IOException e) {
retries--;

10
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DatanodeJspHelper.java
View File

@ -124,7 +124,7 @@ public class DatanodeJspHelper {
if (locations == null || locations.length == 0) {
out.print("Empty file");
} else {
DatanodeInfo chosenNode = JspHelper.bestNode(firstBlock);
DatanodeInfo chosenNode = JspHelper.bestNode(firstBlock, conf);
String fqdn = InetAddress.getByName(chosenNode.getHost())
.getCanonicalHostName();
String datanodeAddr = chosenNode.getName();
@ -299,7 +299,7 @@ public class DatanodeJspHelper {
// URL for TAIL
LocatedBlock lastBlk = blocks.get(blocks.size() - 1);
try {
chosenNode = JspHelper.bestNode(lastBlk);
chosenNode = JspHelper.bestNode(lastBlk, conf);
} catch (IOException e) {
out.print(e.toString());
dfs.close();
@ -514,7 +514,7 @@ public class DatanodeJspHelper {
.getGenerationStamp());
nextStartOffset = 0;
nextBlockSize = nextBlock.getBlock().getNumBytes();
DatanodeInfo d = JspHelper.bestNode(nextBlock);
DatanodeInfo d = JspHelper.bestNode(nextBlock, conf);
String datanodeAddr = d.getName();
nextDatanodePort = Integer.parseInt(datanodeAddr.substring(
datanodeAddr.indexOf(':') + 1, datanodeAddr.length()));
@ -569,7 +569,7 @@ public class DatanodeJspHelper {
if (prevStartOffset < 0)
prevStartOffset = 0;
prevBlockSize = prevBlock.getBlock().getNumBytes();
DatanodeInfo d = JspHelper.bestNode(prevBlock);
DatanodeInfo d = JspHelper.bestNode(prevBlock, conf);
String datanodeAddr = d.getName();
prevDatanodePort = Integer.parseInt(datanodeAddr.substring(
datanodeAddr.indexOf(':') + 1, datanodeAddr.length()));
@ -686,7 +686,7 @@ public class DatanodeJspHelper {
long genStamp = lastBlk.getBlock().getGenerationStamp();
DatanodeInfo chosenNode;
try {
chosenNode = JspHelper.bestNode(lastBlk);
chosenNode = JspHelper.bestNode(lastBlk, conf);
} catch (IOException e) {
out.print(e.toString());
dfs.close();

11
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/FileDataServlet.java
View File

@ -52,7 +52,9 @@ public class FileDataServlet extends DfsServlet {
String scheme = request.getScheme();
final LocatedBlocks blks = nnproxy.getBlockLocations(
status.getFullPath(new Path(path)).toUri().getPath(), 0, 1);
final DatanodeID host = pickSrcDatanode(blks, status);
final Configuration conf = NameNodeHttpServer.getConfFromContext(
getServletContext());
final DatanodeID host = pickSrcDatanode(blks, status, conf);
final String hostname;
if (host instanceof DatanodeInfo) {
hostname = ((DatanodeInfo)host).getHostName();
@ -83,16 +85,17 @@ public class FileDataServlet extends DfsServlet {
/** Select a datanode to service this request.
* Currently, this looks at no more than the first five blocks of a file,
* selecting a datanode randomly from the most represented.
* @param conf
*/
private DatanodeID pickSrcDatanode(LocatedBlocks blks, HdfsFileStatus i)
throws IOException {
private DatanodeID pickSrcDatanode(LocatedBlocks blks, HdfsFileStatus i,
Configuration conf) throws IOException {
if (i.getLen() == 0 || blks.getLocatedBlocks().size() <= 0) {
// pick a random datanode
NameNode nn = NameNodeHttpServer.getNameNodeFromContext(
getServletContext());
return NamenodeJspHelper.getRandomDatanode(nn);
}
return JspHelper.bestNode(blks);
return JspHelper.bestNode(blks, conf);
}
/**

5
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/NamenodeFsck.java
View File

@ -509,8 +509,9 @@ public class NamenodeFsck {
String file = BlockReaderFactory.getFileName(targetAddr, block.getBlockPoolId(),
block.getBlockId());
blockReader = BlockReaderFactory.newBlockReader(s, file, block, lblock
.getBlockToken(), 0, -1, conf.getInt("io.file.buffer.size", 4096));
blockReader = BlockReaderFactory.newBlockReader(
conf, s, file, block, lblock
.getBlockToken(), 0, -1);
} catch (IOException ex) {
// Put chosen node into dead list, continue

9
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/namenode/web/resources/NamenodeWebHdfsMethods.java
View File

@ -118,8 +118,8 @@ public class NamenodeWebHdfsMethods {
private @Context HttpServletResponse response;
private static DatanodeInfo chooseDatanode(final NameNode namenode,
final String path, final HttpOpParam.Op op, final long openOffset
) throws IOException {
final String path, final HttpOpParam.Op op, final long openOffset,
Configuration conf) throws IOException {
if (op == GetOpParam.Op.OPEN
|| op == GetOpParam.Op.GETFILECHECKSUM
|| op == PostOpParam.Op.APPEND) {
@ -139,7 +139,7 @@ public class NamenodeWebHdfsMethods {
final LocatedBlocks locations = np.getBlockLocations(path, offset, 1);
final int count = locations.locatedBlockCount();
if (count > 0) {
return JspHelper.bestNode(locations.get(0));
return JspHelper.bestNode(locations.get(0), conf);
}
}
}
@ -165,7 +165,8 @@ public class NamenodeWebHdfsMethods {
final UserGroupInformation ugi, final DelegationParam delegation,
final String path, final HttpOpParam.Op op, final long openOffset,
final Param<?, ?>... parameters) throws URISyntaxException, IOException {
final DatanodeInfo dn = chooseDatanode(namenode, path, op, openOffset);
final Configuration conf = (Configuration)context.getAttribute(JspHelper.CURRENT_CONF);
final DatanodeInfo dn = chooseDatanode(namenode, path, op, openOffset, conf);
final String delegationQuery;
if (!UserGroupInformation.isSecurityEnabled()) {

112
hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/util/DirectBufferPool.java Normal file
View File

@ -0,0 +1,112 @@
/**
* 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.util;
import java.lang.ref.WeakReference;
import java.nio.ByteBuffer;
import java.util.HashMap;
import java.util.Iterator;
import java.util.LinkedList;
import java.util.List;
import java.util.Map;
import java.util.Queue;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentLinkedQueue;
import java.util.concurrent.ConcurrentMap;
import org.apache.hadoop.classification.InterfaceAudience;
import com.google.common.annotations.VisibleForTesting;
/**
* A simple class for pooling direct ByteBuffers. This is necessary
* because Direct Byte Buffers do not take up much space on the heap,
* and hence will not trigger GCs on their own. However, they do take
* native memory, and thus can cause high memory usage if not pooled.
* The pooled instances are referred to only via weak references, allowing
* them to be collected when a GC does run.
*
* This class only does effective pooling when many buffers will be
* allocated at the same size. There is no attempt to reuse larger
* buffers to satisfy smaller allocations.
*/
@InterfaceAudience.Private
public class DirectBufferPool {
// Essentially implement a multimap with weak values.
ConcurrentMap<Integer, Queue<WeakReference<ByteBuffer>>> buffersBySize =
new ConcurrentHashMap<Integer, Queue<WeakReference<ByteBuffer>>>();
/**
* Allocate a direct buffer of the specified size, in bytes.
* If a pooled buffer is available, returns that. Otherwise
* allocates a new one.
*/
public ByteBuffer getBuffer(int size) {
Queue<WeakReference<ByteBuffer>> list = buffersBySize.get(size);
if (list == null) {
// no available buffers for this size
return ByteBuffer.allocateDirect(size);
}
WeakReference<ByteBuffer> ref;
while ((ref = list.poll()) != null) {
ByteBuffer b = ref.get();
if (b != null) {
return b;
}
}
return ByteBuffer.allocateDirect(size);
}
/**
* Return a buffer into the pool. After being returned,
* the buffer may be recycled, so the user must not
* continue to use it in any way.
* @param buf the buffer to return
*/
public void returnBuffer(ByteBuffer buf) {
buf.clear(); // reset mark, limit, etc
int size = buf.capacity();
Queue<WeakReference<ByteBuffer>> list = buffersBySize.get(size);
if (list == null) {
list = new ConcurrentLinkedQueue<WeakReference<ByteBuffer>>();
Queue<WeakReference<ByteBuffer>> prev = buffersBySize.putIfAbsent(size, list);
// someone else put a queue in the map before we did
if (prev != null) {
list = prev;
}
}
list.add(new WeakReference<ByteBuffer>(buf));
}
/**
* Return the number of available buffers of a given size.
* This is used only for tests.
*/
@VisibleForTesting
int countBuffersOfSize(int size) {
Queue<WeakReference<ByteBuffer>> list = buffersBySize.get(size);
if (list == null) {
return 0;
}
return list.size();
}
}

6
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/BlockReaderTestUtil.java
View File

@ -139,15 +139,17 @@ public class BlockReaderTestUtil {
ExtendedBlock block = testBlock.getBlock();
DatanodeInfo[] nodes = testBlock.getLocations();
targetAddr = NetUtils.createSocketAddr(nodes[0].getName());
sock = new Socket();
sock = NetUtils.getDefaultSocketFactory(conf).createSocket();
sock.connect(targetAddr, HdfsServerConstants.READ_TIMEOUT);
sock.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
return BlockReaderFactory.newBlockReader(
new DFSClient.Conf(conf),
sock, targetAddr.toString()+ ":" + block.getBlockId(), block,
testBlock.getBlockToken(),
offset, lenToRead,
conf.getInt("io.file.buffer.size", 4096));
conf.getInt("io.file.buffer.size", 4096),
true, "");
}
/**

14
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestClientBlockVerification.java
View File

@ -20,11 +20,12 @@ package org.apache.hadoop.hdfs;
import java.util.List;
import org.apache.hadoop.hdfs.RemoteBlockReader;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.commons.logging.impl.Log4JLogger;
import org.apache.hadoop.hdfs.protocol.LocatedBlock;
import org.apache.hadoop.hdfs.protocol.proto.DataTransferProtos.Status;
import org.apache.hadoop.fs.Path;
import org.apache.log4j.Level;
import org.junit.Test;
import org.junit.AfterClass;
@ -40,6 +41,9 @@ public class TestClientBlockVerification {
static final int FILE_SIZE_K = 256;
static LocatedBlock testBlock = null;
static {
((Log4JLogger)RemoteBlockReader2.LOG).getLogger().setLevel(Level.ALL);
}
@BeforeClass
public static void setupCluster() throws Exception {
final int REPLICATION_FACTOR = 1;
@ -54,7 +58,7 @@ public class TestClientBlockVerification {
*/
@Test
public void testBlockVerification() throws Exception {
RemoteBlockReader reader = (RemoteBlockReader)spy(
RemoteBlockReader2 reader = (RemoteBlockReader2)spy(
util.getBlockReader(testBlock, 0, FILE_SIZE_K * 1024));
util.readAndCheckEOS(reader, FILE_SIZE_K * 1024, true);
verify(reader).sendReadResult(reader.dnSock, Status.CHECKSUM_OK);
@ -66,7 +70,7 @@ public class TestClientBlockVerification {
*/
@Test
public void testIncompleteRead() throws Exception {
RemoteBlockReader reader = (RemoteBlockReader)spy(
RemoteBlockReader2 reader = (RemoteBlockReader2)spy(
util.getBlockReader(testBlock, 0, FILE_SIZE_K * 1024));
util.readAndCheckEOS(reader, FILE_SIZE_K / 2 * 1024, false);
@ -84,7 +88,7 @@ public class TestClientBlockVerification {
@Test
public void testCompletePartialRead() throws Exception {
// Ask for half the file
RemoteBlockReader reader = (RemoteBlockReader)spy(
RemoteBlockReader2 reader = (RemoteBlockReader2)spy(
util.getBlockReader(testBlock, 0, FILE_SIZE_K * 1024 / 2));
// And read half the file
util.readAndCheckEOS(reader, FILE_SIZE_K * 1024 / 2, true);
@ -104,7 +108,7 @@ public class TestClientBlockVerification {
for (int length : lengths) {
DFSClient.LOG.info("Testing startOffset = " + startOffset + " and " +
" len=" + length);
RemoteBlockReader reader = (RemoteBlockReader)spy(
RemoteBlockReader2 reader = (RemoteBlockReader2)spy(
util.getBlockReader(testBlock, startOffset, length));
util.readAndCheckEOS(reader, length, true);
verify(reader).sendReadResult(reader.dnSock, Status.CHECKSUM_OK);

17
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestConnCache.java
View File

@ -28,7 +28,6 @@ import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.hdfs.RemoteBlockReader;
import org.apache.hadoop.hdfs.DFSClient;
import org.apache.hadoop.hdfs.DFSInputStream;
import org.apache.hadoop.hdfs.SocketCache;
@ -76,20 +75,20 @@ public class TestConnCache {
* It verifies that all invocation to DFSInputStream.getBlockReader()
* use the same socket.
*/
private class MockGetBlockReader implements Answer<RemoteBlockReader> {
public RemoteBlockReader reader = null;
private class MockGetBlockReader implements Answer<RemoteBlockReader2> {
public RemoteBlockReader2 reader = null;
private Socket sock = null;
public RemoteBlockReader answer(InvocationOnMock invocation) throws Throwable {
RemoteBlockReader prevReader = reader;
reader = (RemoteBlockReader) invocation.callRealMethod();
public RemoteBlockReader2 answer(InvocationOnMock invocation) throws Throwable {
RemoteBlockReader2 prevReader = reader;
reader = (RemoteBlockReader2) invocation.callRealMethod();
if (sock == null) {
sock = reader.dnSock;
} else if (prevReader != null && prevReader.hasSentStatusCode()) {
// Can't reuse socket if the previous BlockReader didn't read till EOS.
} else if (prevReader != null) {
assertSame("DFSInputStream should use the same socket",
sock, reader.dnSock);
} return reader;
}
return reader;
}
}

5
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/TestSeekBug.java
View File

@ -28,6 +28,7 @@ import org.apache.hadoop.fs.ChecksumFileSystem;
import org.apache.hadoop.fs.FSDataInputStream;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.IOUtils;
/**
* This class tests the presence of seek bug as described
@ -67,12 +68,12 @@ public class TestSeekBug extends TestCase {
stm.read(actual, 0, actual.length);
// Now read a byte array that is bigger than the internal buffer
actual = new byte[100000];
stm.read(actual, 0, actual.length);
IOUtils.readFully(stm, actual, 0, actual.length);
checkAndEraseData(actual, 128, expected, "First Read Test");
// now do a small seek, within the range that is already read
stm.seek(96036); // 4 byte seek
actual = new byte[128];
stm.read(actual, 0, actual.length);
IOUtils.readFully(stm, actual, 0, actual.length);
checkAndEraseData(actual, 96036, expected, "Seek Bug");
// all done
stm.close();

8
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/blockmanagement/TestBlockTokenWithDFS.java
View File

@ -137,15 +137,15 @@ public class TestBlockTokenWithDFS {
try {
DatanodeInfo[] nodes = lblock.getLocations();
targetAddr = NetUtils.createSocketAddr(nodes[0].getName());
s = new Socket();
s = NetUtils.getDefaultSocketFactory(conf).createSocket();
s.connect(targetAddr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
String file = BlockReaderFactory.getFileName(targetAddr,
"test-blockpoolid", block.getBlockId());
blockReader = BlockReaderFactory.newBlockReader(s, file, block,
lblock.getBlockToken(), 0, -1,
conf.getInt("io.file.buffer.size", 4096));
blockReader = BlockReaderFactory.newBlockReader(
conf, s, file, block,
lblock.getBlockToken(), 0, -1);
} catch (IOException ex) {
if (ex instanceof InvalidBlockTokenException) {

9
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDataNodeVolumeFailure.java
View File

@ -56,6 +56,7 @@ import static org.junit.Assert.*;
public class TestDataNodeVolumeFailure {
final private int block_size = 512;
MiniDFSCluster cluster = null;
private Configuration conf;
int dn_num = 2;
int blocks_num = 30;
short repl=2;
@ -74,7 +75,7 @@ public class TestDataNodeVolumeFailure {
@Before
public void setUp() throws Exception {
// bring up a cluster of 2
Configuration conf = new HdfsConfiguration();
conf = new HdfsConfiguration();
conf.setLong(DFSConfigKeys.DFS_BLOCK_SIZE_KEY, block_size);
// Allow a single volume failure (there are two volumes)
conf.setInt(DFSConfigKeys.DFS_DATANODE_FAILED_VOLUMES_TOLERATED_KEY, 1);
@ -264,7 +265,7 @@ public class TestDataNodeVolumeFailure {
targetAddr = NetUtils.createSocketAddr(datanode.getName());
s = new Socket();
s = NetUtils.getDefaultSocketFactory(conf).createSocket();
s.connect(targetAddr, HdfsServerConstants.READ_TIMEOUT);
s.setSoTimeout(HdfsServerConstants.READ_TIMEOUT);
@ -272,8 +273,8 @@ public class TestDataNodeVolumeFailure {
"test-blockpoolid",
block.getBlockId());
BlockReader blockReader =
BlockReaderFactory.newBlockReader(s, file, block, lblock
.getBlockToken(), 0, -1, 4096);
BlockReaderFactory.newBlockReader(conf, s, file, block, lblock
.getBlockToken(), 0, -1);
// nothing - if it fails - it will throw and exception
}

3
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestDatanodeJsp.java
View File

@ -67,7 +67,8 @@ public class TestDatanodeJsp {
String viewFilePage = DFSTestUtil.urlGet(url);
assertTrue("page should show preview of file contents", viewFilePage.contains(FILE_DATA));
assertTrue("page should show preview of file contents, got: " + viewFilePage,
viewFilePage.contains(FILE_DATA));
if (!doTail) {
assertTrue("page should show link to download file", viewFilePage

95
hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/util/TestDirectBufferPool.java Normal file
View File

@ -0,0 +1,95 @@
/**
* 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.util;
import static org.junit.Assert.*;
import java.nio.ByteBuffer;
import java.util.List;
import org.junit.Test;
import com.google.common.collect.Lists;
public class TestDirectBufferPool {
DirectBufferPool pool = new DirectBufferPool();
@Test
public void testBasics() {
ByteBuffer a = pool.getBuffer(100);
assertEquals(100, a.capacity());
assertEquals(100, a.remaining());
pool.returnBuffer(a);
// Getting a new buffer should return the same one
ByteBuffer b = pool.getBuffer(100);
assertSame(a, b);
// Getting a new buffer before returning "B" should
// not return the same one
ByteBuffer c = pool.getBuffer(100);
assertNotSame(b, c);
pool.returnBuffer(b);
pool.returnBuffer(c);
}
@Test
public void testBuffersAreReset() {
ByteBuffer a = pool.getBuffer(100);
a.putInt(0xdeadbeef);
assertEquals(96, a.remaining());
pool.returnBuffer(a);
// Even though we return the same buffer,
// its position should be reset to 0
ByteBuffer b = pool.getBuffer(100);
assertSame(a, b);
assertEquals(100, a.remaining());
pool.returnBuffer(b);
}
@Test
public void testWeakRefClearing() {
// Allocate and return 10 buffers.
List<ByteBuffer> bufs = Lists.newLinkedList();
for (int i = 0; i < 10; i++) {
ByteBuffer buf = pool.getBuffer(100);
bufs.add(buf);
}
for (ByteBuffer buf : bufs) {
pool.returnBuffer(buf);
}
assertEquals(10, pool.countBuffersOfSize(100));
// Clear out any references to the buffers, and force
// GC. Weak refs should get cleared.
bufs.clear();
bufs = null;
for (int i = 0; i < 3; i++) {
System.gc();
}
ByteBuffer buf = pool.getBuffer(100);
// the act of getting a buffer should clear all the nulled
// references from the pool.
assertEquals(0, pool.countBuffersOfSize(100));
pool.returnBuffer(buf);
}
}