總述
上一章中我們是本地開發好打jar包上傳至伺服器進行執行，但是開發過程中這樣顯然是行不通的，是以我們需要更多的執行環境。
MR執行環境有兩種：本地測試環境，伺服器環境
一、本地測試環境
本地開發好環境是在windows下執行的。通過eclipse可以看到執行資訊。
二、伺服器環境
首先需要在src下放置伺服器上的hadoop配置檔案
1、直接在伺服器上，使用指令的方式調用，執行過程也在伺服器上
a、把MR程式打包（jar），傳送到伺服器上
b、通過： hadoop jar jar路徑 類的全限定名
2、在本地直接調用，執行過程在伺服器上（真正企業運作環境）
a、把MR程式打包（jar），直接放到本地
b、修改hadoop的源碼 ，注意：確定項目的lib需要真實安裝的jdk的lib
c、增加一個屬性：
config.set("mapred.jar", "C:\\Users\\Administrator\\Desktop\\wc.jar");
d、将hadoop下圖四個配置檔案拷貝至項目src目錄下
e、本地執行main方法，servlet調用MR。
步驟
本地測試環境：
一、下載下傳hadoop，将hadoop目錄存放至windows某一路徑下，big配置環境變量。
因為我使用的是hadoop-2.5.1，是以我将下載下傳下來的hadoop-2.5.1放在我windows的D:\Software_address目錄
二、将winutils.exe插件放進hadoop目錄下的bin檔案夾下
二、配置hadoop環境變量
1、在系統變量中添加HADOOP_HOME變量為 D:\Software_address\hadoop-2.5.1
2、在系統變量的PATH變量後面續上 %HADOOP_HOME%\bin
【注意：配置完環境變量後，需要重新開機eclipse才可以生效。】
三、修改Hadoop源碼，如下圖分别在org.apache.hadoop.io.nativeio 、org.apache.hadoop.mapred 兩個包下
其源碼分别如下：
/**
* 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.io.nativeio;
import java.io.File;
import java.io.FileDescriptor;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.lang.reflect.Field;
import java.nio.ByteBuffer;
import java.nio.MappedByteBuffer;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import org.apache.hadoop.classification.InterfaceAudience;
import org.apache.hadoop.classification.InterfaceStability;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.CommonConfigurationKeys;
import org.apache.hadoop.io.SecureIOUtils.AlreadyExistsException;
import org.apache.hadoop.util.NativeCodeLoader;
import org.apache.hadoop.util.Shell;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import sun.misc.Unsafe;
import com.google.common.annotations.VisibleForTesting;
/**
* JNI wrappers for various native IO-related calls not available in Java.
* These functions should generally be used alongside a fallback to another
* more portable mechanism.
*/
@InterfaceAudience.Private
@InterfaceStability.Unstable
public class NativeIO {
public static class POSIX {
// Flags for open() call from bits/fcntl.h
public static final int O_RDONLY = 00;
public static final int O_WRONLY = 01;
public static final int O_RDWR = 02;
public static final int O_CREAT = 0100;
public static final int O_EXCL = 0200;
public static final int O_NOCTTY = 0400;
public static final int O_TRUNC = 01000;
public static final int O_APPEND = 02000;
public static final int O_NONBLOCK = 04000;
public static final int O_SYNC = 010000;
public static final int O_ASYNC = 020000;
public static final int O_FSYNC = O_SYNC;
public static final int O_NDELAY = O_NONBLOCK;
// Flags for posix_fadvise() from bits/fcntl.h
/* No further special treatment. */
public static final int POSIX_FADV_NORMAL = 0;
/* Expect random page references. */
public static final int POSIX_FADV_RANDOM = 1;
/* Expect sequential page references. */
public static final int POSIX_FADV_SEQUENTIAL = 2;
/* Will need these pages. */
public static final int POSIX_FADV_WILLNEED = 3;
/* Don't need these pages. */
public static final int POSIX_FADV_DONTNEED = 4;
/* Data will be accessed once. */
public static final int POSIX_FADV_NOREUSE = 5;
/* Wait upon writeout of all pages
in the range before performing the
write. */
public static final int SYNC_FILE_RANGE_WAIT_BEFORE = 1;
/* Initiate writeout of all those
dirty pages in the range which are
not presently under writeback. */
public static final int SYNC_FILE_RANGE_WRITE = 2;
/* Wait upon writeout of all pages in
the range after performing the
write. */
public static final int SYNC_FILE_RANGE_WAIT_AFTER = 4;
private static final Log LOG = LogFactory.getLog(NativeIO.class);
private static boolean nativeLoaded = false;
private static boolean fadvisePossible = true;
private static boolean syncFileRangePossible = true;
static final String WORKAROUND_NON_THREADSAFE_CALLS_KEY =
"hadoop.workaround.non.threadsafe.getpwuid";
static final boolean WORKAROUND_NON_THREADSAFE_CALLS_DEFAULT = true;
private static long cacheTimeout = -1;
private static CacheManipulator cacheManipulator = new CacheManipulator();
public static CacheManipulator getCacheManipulator() {
return cacheManipulator;
}
public static void setCacheManipulator(CacheManipulator cacheManipulator) {
POSIX.cacheManipulator = cacheManipulator;
}
/**
* Used to manipulate the operating system cache.
*/
@VisibleForTesting
public static class CacheManipulator {
public void mlock(String identifier, ByteBuffer buffer,
long len) throws IOException {
POSIX.mlock(buffer, len);
}
public long getMemlockLimit() {
return NativeIO.getMemlockLimit();
}
public long getOperatingSystemPageSize() {
return NativeIO.getOperatingSystemPageSize();
}
public void posixFadviseIfPossible(String identifier,
FileDescriptor fd, long offset, long len, int flags)
throws NativeIOException {
NativeIO.POSIX.posixFadviseIfPossible(identifier, fd, offset,
len, flags);
}
public boolean verifyCanMlock() {
return NativeIO.isAvailable();
}
}
/**
* A CacheManipulator used for testing which does not actually call mlock.
* This allows many tests to be run even when the operating system does not
* allow mlock, or only allows limited mlocking.
*/
@VisibleForTesting
public static class NoMlockCacheManipulator extends CacheManipulator {
public void mlock(String identifier, ByteBuffer buffer,
long len) throws IOException {
LOG.info("mlocking " + identifier);
}
public long getMemlockLimit() {
return 1125899906842624L;
}
public long getOperatingSystemPageSize() {
return 4096;
}
public boolean verifyCanMlock() {
return true;
}
}
static {
if (NativeCodeLoader.isNativeCodeLoaded()) {
try {
Configuration conf = new Configuration();
workaroundNonThreadSafePasswdCalls = conf.getBoolean(
WORKAROUND_NON_THREADSAFE_CALLS_KEY,
WORKAROUND_NON_THREADSAFE_CALLS_DEFAULT);
initNative();
nativeLoaded = true;
cacheTimeout = conf.getLong(
CommonConfigurationKeys.HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_KEY,
CommonConfigurationKeys.HADOOP_SECURITY_UID_NAME_CACHE_TIMEOUT_DEFAULT) *
1000;
LOG.debug("Initialized cache for IDs to User/Group mapping with a " +
" cache timeout of " + cacheTimeout/1000 + " seconds.");
} catch (Throwable t) {
// This can happen if the user has an older version of libhadoop.so
// installed - in this case we can continue without native IO
// after warning
LOG.error("Unable to initialize NativeIO libraries", t);
}
}
}
/**
* Return true if the JNI-based native IO extensions are available.
*/
public static boolean isAvailable() {
return NativeCodeLoader.isNativeCodeLoaded() && nativeLoaded;
}
private static void assertCodeLoaded() throws IOException {
if (!isAvailable()) {
throw new IOException("NativeIO was not loaded");
}
}
/** Wrapper around open(2) */
public static native FileDescriptor open(String path, int flags, int mode) throws IOException;
/** Wrapper around fstat(2) */
private static native Stat fstat(FileDescriptor fd) throws IOException;
/** Native chmod implementation. On UNIX, it is a wrapper around chmod(2) */
private static native void chmodImpl(String path, int mode) throws IOException;
public static void chmod(String path, int mode) throws IOException {
if (!Shell.WINDOWS) {
chmodImpl(path, mode);
} else {
try {
chmodImpl(path, mode);
} catch (NativeIOException nioe) {
if (nioe.getErrorCode() == 3) {
throw new NativeIOException("No such file or directory",
Errno.ENOENT);
} else {
LOG.warn(String.format("NativeIO.chmod error (%d): %s",
nioe.getErrorCode(), nioe.getMessage()));
throw new NativeIOException("Unknown error", Errno.UNKNOWN);
}
}
}
}
/** Wrapper around posix_fadvise(2) */
static native void posix_fadvise(
FileDescriptor fd, long offset, long len, int flags) throws NativeIOException;
/** Wrapper around sync_file_range(2) */
static native void sync_file_range(
FileDescriptor fd, long offset, long nbytes, int flags) throws NativeIOException;
/**
* Call posix_fadvise on the given file descriptor. See the manpage
* for this syscall for more information. On systems where this
* call is not available, does nothing.
*
* @throws NativeIOException if there is an error with the syscall
*/
static void posixFadviseIfPossible(String identifier,
FileDescriptor fd, long offset, long len, int flags)
throws NativeIOException {
if (nativeLoaded && fadvisePossible) {
try {
posix_fadvise(fd, offset, len, flags);
} catch (UnsupportedOperationException uoe) {
fadvisePossible = false;
} catch (UnsatisfiedLinkError ule) {
fadvisePossible = false;
}
}
}
/**
* Call sync_file_range on the given file descriptor. See the manpage
* for this syscall for more information. On systems where this
* call is not available, does nothing.
*
* @throws NativeIOException if there is an error with the syscall
*/
public static void syncFileRangeIfPossible(
FileDescriptor fd, long offset, long nbytes, int flags)
throws NativeIOException {
if (nativeLoaded && syncFileRangePossible) {
try {
sync_file_range(fd, offset, nbytes, flags);
} catch (UnsupportedOperationException uoe) {
syncFileRangePossible = false;
} catch (UnsatisfiedLinkError ule) {
syncFileRangePossible = false;
}
}
}
static native void mlock_native(
ByteBuffer buffer, long len) throws NativeIOException;
static native void munlock_native(
ByteBuffer buffer, long len) throws NativeIOException;
/**
* Locks the provided direct ByteBuffer into memory, preventing it from
* swapping out. After a buffer is locked, future accesses will not incur
* a page fault.
*
* See the mlock(2) man page for more information.
*
* @throws NativeIOException
*/
static void mlock(ByteBuffer buffer, long len)
throws IOException {
assertCodeLoaded();
if (!buffer.isDirect()) {
throw new IOException("Cannot mlock a non-direct ByteBuffer");
}
mlock_native(buffer, len);
}
/**
* Unlocks a locked direct ByteBuffer, allowing it to swap out of memory.
* This is a no-op if the ByteBuffer was not previously locked.
*
* See the munlock(2) man page for more information.
*
* @throws NativeIOException
*/
public static void munlock(ByteBuffer buffer, long len)
throws IOException {
assertCodeLoaded();
if (!buffer.isDirect()) {
throw new IOException("Cannot munlock a non-direct ByteBuffer");
}
munlock_native(buffer, len);
}
/**
* Unmaps the block from memory. See munmap(2).
*
* There isn't any portable way to unmap a memory region in Java.
* So we use the sun.nio method here.
* Note that unmapping a memory region could cause crashes if code
* continues to reference the unmapped code. However, if we don't
* manually unmap the memory, we are dependent on the finalizer to
* do it, and we have no idea when the finalizer will run.
*
* @param buffer The buffer to unmap.
*/
public static void munmap(MappedByteBuffer buffer) {
if (buffer instanceof sun.nio.ch.DirectBuffer) {
sun.misc.Cleaner cleaner =
((sun.nio.ch.DirectBuffer)buffer).cleaner();
cleaner.clean();
}
}
/** Linux only methods used for getOwner() implementation */
private static native long getUIDforFDOwnerforOwner(FileDescriptor fd) throws IOException;
private static native String getUserName(long uid) throws IOException;
/**
* Result type of the fstat call
*/
public static class Stat {
private int ownerId, groupId;
private String owner, group;
private int mode;
// Mode constants
public static final int S_IFMT = 0170000; /* type of file */
public static final int S_IFIFO = 0010000; /* named pipe (fifo) */
public static final int S_IFCHR = 0020000; /* character special */
public static final int S_IFDIR = 0040000; /* directory */
public static final int S_IFBLK = 0060000; /* block special */
public static final int S_IFREG = 0100000; /* regular */
public static final int S_IFLNK = 0120000; /* symbolic link */
public static final int S_IFSOCK = 0140000; /* socket */
public static final int S_IFWHT = 0160000; /* whiteout */
public static final int S_ISUID = 0004000; /* set user id on execution */
public static final int S_ISGID = 0002000; /* set group id on execution */
public static final int S_ISVTX = 0001000; /* save swapped text even after use */
public static final int S_IRUSR = 0000400; /* read permission, owner */
public static final int S_IWUSR = 0000200; /* write permission, owner */
public static final int S_IXUSR = 0000100; /* execute/search permission, owner */
Stat(int ownerId, int groupId, int mode) {
this.ownerId = ownerId;
this.groupId = groupId;
this.mode = mode;
}
Stat(String owner, String group, int mode) {
if (!Shell.WINDOWS) {
this.owner = owner;
} else {
this.owner = stripDomain(owner);
}
if (!Shell.WINDOWS) {
this.group = group;
} else {
this.group = stripDomain(group);
}
this.mode = mode;
}
@Override
public String toString() {
return "Stat(owner='" + owner + "', group='" + group + "'" +
", mode=" + mode + ")";
}
public String getOwner() {
return owner;
}
public String getGroup() {
return group;
}
public int getMode() {
return mode;
}
}
/**
* Returns the file stat for a file descriptor.
*
* @param fd file descriptor.
* @return the file descriptor file stat.
* @throws IOException thrown if there was an IO error while obtaining the file stat.
*/
public static Stat getFstat(FileDescriptor fd) throws IOException {
Stat stat = null;
if (!Shell.WINDOWS) {
stat = fstat(fd);
stat.owner = getName(IdCache.USER, stat.ownerId);
stat.group = getName(IdCache.GROUP, stat.groupId);
} else {
try {
stat = fstat(fd);
} catch (NativeIOException nioe) {
if (nioe.getErrorCode() == 6) {
throw new NativeIOException("The handle is invalid.",
Errno.EBADF);
} else {
LOG.warn(String.format("NativeIO.getFstat error (%d): %s",
nioe.getErrorCode(), nioe.getMessage()));
throw new NativeIOException("Unknown error", Errno.UNKNOWN);
}
}
}
return stat;
}
private static String getName(IdCache domain, int id) throws IOException {
Map<Integer, CachedName> idNameCache = (domain == IdCache.USER)
? USER_ID_NAME_CACHE : GROUP_ID_NAME_CACHE;
String name;
CachedName cachedName = idNameCache.get(id);
long now = System.currentTimeMillis();
if (cachedName != null && (cachedName.timestamp + cacheTimeout) > now) {
name = cachedName.name;
} else {
name = (domain == IdCache.USER) ? getUserName(id) : getGroupName(id);
if (LOG.isDebugEnabled()) {
String type = (domain == IdCache.USER) ? "UserName" : "GroupName";
LOG.debug("Got " + type + " " + name + " for ID " + id +
" from the native implementation");
}
cachedName = new CachedName(name, now);
idNameCache.put(id, cachedName);
}
return name;
}
static native String getUserName(int uid) throws IOException;
static native String getGroupName(int uid) throws IOException;
private static class CachedName {
final long timestamp;
final String name;
public CachedName(String name, long timestamp) {
this.name = name;
this.timestamp = timestamp;
}
}
private static final Map<Integer, CachedName> USER_ID_NAME_CACHE =
new ConcurrentHashMap<Integer, CachedName>();
private static final Map<Integer, CachedName> GROUP_ID_NAME_CACHE =
new ConcurrentHashMap<Integer, CachedName>();
private enum IdCache { USER, GROUP }
public final static int MMAP_PROT_READ = 0x1;
public final static int MMAP_PROT_WRITE = 0x2;
public final static int MMAP_PROT_EXEC = 0x4;
public static native long mmap(FileDescriptor fd, int prot,
boolean shared, long length) throws IOException;
public static native void munmap(long addr, long length)
throws IOException;
}
private static boolean workaroundNonThreadSafePasswdCalls = false;
public static class Windows {
// Flags for CreateFile() call on Windows
public static final long GENERIC_READ = 0x80000000L;
public static final long GENERIC_WRITE = 0x40000000L;
public static final long FILE_SHARE_READ = 0x00000001L;
public static final long FILE_SHARE_WRITE = 0x00000002L;
public static final long FILE_SHARE_DELETE = 0x00000004L;
public static final long CREATE_NEW = 1;
public static final long CREATE_ALWAYS = 2;
public static final long OPEN_EXISTING = 3;
public static final long OPEN_ALWAYS = 4;
public static final long TRUNCATE_EXISTING = 5;
public static final long FILE_BEGIN = 0;
public static final long FILE_CURRENT = 1;
public static final long FILE_END = 2;
/** Wrapper around CreateFile() on Windows */
public static native FileDescriptor createFile(String path,
long desiredAccess, long shareMode, long creationDisposition)
throws IOException;
/** Wrapper around SetFilePointer() on Windows */
public static native long setFilePointer(FileDescriptor fd,
long distanceToMove, long moveMethod) throws IOException;
/** Windows only methods used for getOwner() implementation */
private static native String getOwner(FileDescriptor fd) throws IOException;
/** Supported list of Windows access right flags */
public static enum AccessRight {
ACCESS_READ (0x0001), // FILE_READ_DATA
ACCESS_WRITE (0x0002), // FILE_WRITE_DATA
ACCESS_EXECUTE (0x0020); // FILE_EXECUTE
private final int accessRight;
AccessRight(int access) {
accessRight = access;
}
public int accessRight() {
return accessRight;
}
};
/** Windows only method used to check if the current process has requested
* access rights on the given path. */
private static native boolean access0(String path, int requestedAccess);
/**
* Checks whether the current process has desired access rights on
* the given path.
*
* Longer term this native function can be substituted with JDK7
* function Files#isReadable, isWritable, isExecutable.
*
* @param path input path
* @param desiredAccess ACCESS_READ, ACCESS_WRITE or ACCESS_EXECUTE
* @return true if access is allowed
* @throws IOException I/O exception on error
*/
public static boolean access(String path, AccessRight desiredAccess)
throws IOException {
return true;
//return access0(path, desiredAccess.accessRight());
}
static {
if (NativeCodeLoader.isNativeCodeLoaded()) {
try {
initNative();
nativeLoaded = true;
} catch (Throwable t) {
// This can happen if the user has an older version of libhadoop.so
// installed - in this case we can continue without native IO
// after warning
LOG.error("Unable to initialize NativeIO libraries", t);
}
}
}
}
private static final Log LOG = LogFactory.getLog(NativeIO.class);
private static boolean nativeLoaded = false;
static {
if (NativeCodeLoader.isNativeCodeLoaded()) {
try {
initNative();
nativeLoaded = true;
} catch (Throwable t) {
// This can happen if the user has an older version of libhadoop.so
// installed - in this case we can continue without native IO
// after warning
LOG.error("Unable to initialize NativeIO libraries", t);
}
}
}
/**
* Return true if the JNI-based native IO extensions are available.
*/
public static boolean isAvailable() {
return NativeCodeLoader.isNativeCodeLoaded() && nativeLoaded;
}
/** Initialize the JNI method ID and class ID cache */
private static native void initNative();
/**
* Get the maximum number of bytes that can be locked into memory at any
* given point.
*
* @return 0 if no bytes can be locked into memory;
* Long.MAX_VALUE if there is no limit;
* The number of bytes that can be locked into memory otherwise.
*/
static long getMemlockLimit() {
return isAvailable() ? getMemlockLimit0() : 0;
}
private static native long getMemlockLimit0();
/**
* @return the operating system's page size.
*/
static long getOperatingSystemPageSize() {
try {
Field f = Unsafe.class.getDeclaredField("theUnsafe");
f.setAccessible(true);
Unsafe unsafe = (Unsafe)f.get(null);
return unsafe.pageSize();
} catch (Throwable e) {
LOG.warn("Unable to get operating system page size. Guessing 4096.", e);
return 4096;
}
}
private static class CachedUid {
final long timestamp;
final String username;
public CachedUid(String username, long timestamp) {
this.timestamp = timestamp;
this.username = username;
}
}
private static final Map<Long, CachedUid> uidCache =
new ConcurrentHashMap<Long, CachedUid>();
private static long cacheTimeout;
private static boolean initialized = false;
/**
* The Windows logon name has two part, NetBIOS domain name and
* user account name, of the format DOMAIN\UserName. This method
* will remove the domain part of the full logon name.
*
* @param the full principal name containing the domain
* @return name with domain removed
*/
private static String stripDomain(String name) {
int i = name.indexOf('\\');
if (i != -1)
name = name.substring(i + 1);
return name;
}
public static String getOwner(FileDescriptor fd) throws IOException {
ensureInitialized();
if (Shell.WINDOWS) {
String owner = Windows.getOwner(fd);
owner = stripDomain(owner);
return owner;
} else {
long uid = POSIX.getUIDforFDOwnerforOwner(fd);
CachedUid cUid = uidCache.get(uid);
long now = System.currentTimeMillis();
if (cUid != null && (cUid.timestamp + cacheTimeout) > now) {
return cUid.username;
}
String user = POSIX.getUserName(uid);
LOG.info("Got UserName " + user + " for UID " + uid
+ " from the native implementation");
cUid = new CachedUid(user, now);
uidCache.put(uid, cUid);
return user;
}
}
/**
* Create a FileInputStream that shares delete permission on the
* file opened, i.e. other process can delete the file the
* FileInputStream is reading. Only Windows implementation uses
* the native interface.
*/
public static FileInputStream getShareDeleteFileInputStream(File f)
throws IOException {
if (!Shell.WINDOWS) {
// On Linux the default FileInputStream shares delete permission
// on the file opened.
//
return new FileInputStream(f);
} else {
// Use Windows native interface to create a FileInputStream that
// shares delete permission on the file opened.
//
FileDescriptor fd = Windows.createFile(
f.getAbsolutePath(),
Windows.GENERIC_READ,
Windows.FILE_SHARE_READ |
Windows.FILE_SHARE_WRITE |
Windows.FILE_SHARE_DELETE,
Windows.OPEN_EXISTING);
return new FileInputStream(fd);
}
}
/**
* Create a FileInputStream that shares delete permission on the
* file opened at a given offset, i.e. other process can delete
* the file the FileInputStream is reading. Only Windows implementation
* uses the native interface.
*/
public static FileInputStream getShareDeleteFileInputStream(File f, long seekOffset)
throws IOException {
if (!Shell.WINDOWS) {
RandomAccessFile rf = new RandomAccessFile(f, "r");
if (seekOffset > 0) {
rf.seek(seekOffset);
}
return new FileInputStream(rf.getFD());
} else {
// Use Windows native interface to create a FileInputStream that
// shares delete permission on the file opened, and set it to the
// given offset.
//
FileDescriptor fd = NativeIO.Windows.createFile(
f.getAbsolutePath(),
NativeIO.Windows.GENERIC_READ,
NativeIO.Windows.FILE_SHARE_READ |
NativeIO.Windows.FILE_SHARE_WRITE |
NativeIO.Windows.FILE_SHARE_DELETE,
NativeIO.Windows.OPEN_EXISTING);
if (seekOffset > 0)
NativeIO.Windows.setFilePointer(fd, seekOffset, NativeIO.Windows.FILE_BEGIN);
return new FileInputStream(fd);
}
}
/**
* Create the specified File for write access, ensuring that it does not exist.
* @param f the file that we want to create
* @param permissions we want to have on the file (if security is enabled)
*
* @throws AlreadyExistsException if the file already exists
* @throws IOException if any other error occurred
*/
public static FileOutputStream getCreateForWriteFileOutputStream(File f, int permissions)
throws IOException {
if (!Shell.WINDOWS) {
// Use the native wrapper around open(2)
try {
FileDescriptor fd = NativeIO.POSIX.open(f.getAbsolutePath(),
NativeIO.POSIX.O_WRONLY | NativeIO.POSIX.O_CREAT
| NativeIO.POSIX.O_EXCL, permissions);
return new FileOutputStream(fd);
} catch (NativeIOException nioe) {
if (nioe.getErrno() == Errno.EEXIST) {
throw new AlreadyExistsException(nioe);
}
throw nioe;
}
} else {
// Use the Windows native APIs to create equivalent FileOutputStream
try {
FileDescriptor fd = NativeIO.Windows.createFile(f.getCanonicalPath(),
NativeIO.Windows.GENERIC_WRITE,
NativeIO.Windows.FILE_SHARE_DELETE
| NativeIO.Windows.FILE_SHARE_READ
| NativeIO.Windows.FILE_SHARE_WRITE,
NativeIO.Windows.CREATE_NEW);
NativeIO.POSIX.chmod(f.getCanonicalPath(), permissions);
return new FileOutputStream(fd);
} catch (NativeIOException nioe) {
if (nioe.getErrorCode() == 80) {
// ERROR_FILE_EXISTS
// 80 (0x50)
// The file exists
throw new AlreadyExistsException(nioe);
}
throw nioe;
}
}
}
private synchronized static void ensureInitialized() {
if (!initialized) {
cacheTimeout =
new Configuration().getLong("hadoop.security.uid.cache.secs",
4*60*60) * 1000;
LOG.info("Initialized cache for UID to User mapping with a cache" +
" timeout of " + cacheTimeout/1000 + " seconds.");
initialized = true;
}
}
/**
* A version of renameTo that throws a descriptive exception when it fails.
*
* @param src The source path
* @param dst The destination path
*
* @throws NativeIOException On failure.
*/
public static void renameTo(File src, File dst)
throws IOException {
if (!nativeLoaded) {
if (!src.renameTo(dst)) {
throw new IOException("renameTo(src=" + src + ", dst=" +
dst + ") failed.");
}
} else {
renameTo0(src.getAbsolutePath(), dst.getAbsolutePath());
}
}
/**
* A version of renameTo that throws a descriptive exception when it fails.
*
* @param src The source path
* @param dst The destination path
*
* @throws NativeIOException On failure.
*/
private static native void renameTo0(String src, String dst)
throws NativeIOException;
}
/**
* 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.mapred;
import java.io.IOException;
import java.nio.ByteBuffer;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.HashSet;
import java.util.List;
import java.util.Map;
import java.util.Vector;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileContext;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.UnsupportedFileSystemException;
import org.apache.hadoop.io.DataOutputBuffer;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.ipc.ProtocolSignature;
import org.apache.hadoop.mapred.ClientCache;
import org.apache.hadoop.mapred.JobConf;
import org.apache.hadoop.mapred.Master;
import org.apache.hadoop.mapred.ResourceMgrDelegate;
import org.apache.hadoop.mapred.YARNRunner;
import org.apache.hadoop.mapreduce.Cluster.JobTrackerStatus;
import org.apache.hadoop.mapreduce.ClusterMetrics;
import org.apache.hadoop.mapreduce.Counters;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.JobID;
import org.apache.hadoop.mapreduce.JobStatus;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.QueueAclsInfo;
import org.apache.hadoop.mapreduce.QueueInfo;
import org.apache.hadoop.mapreduce.TaskAttemptID;
import org.apache.hadoop.mapreduce.TaskCompletionEvent;
import org.apache.hadoop.mapreduce.TaskReport;
import org.apache.hadoop.mapreduce.TaskTrackerInfo;
import org.apache.hadoop.mapreduce.TaskType;
import org.apache.hadoop.mapreduce.TypeConverter;
import org.apache.hadoop.mapreduce.protocol.ClientProtocol;
import org.apache.hadoop.mapreduce.security.token.delegation.DelegationTokenIdentifier;
import org.apache.hadoop.mapreduce.v2.LogParams;
import org.apache.hadoop.mapreduce.v2.api.MRClientProtocol;
import org.apache.hadoop.mapreduce.v2.api.protocolrecords.GetDelegationTokenRequest;
import org.apache.hadoop.mapreduce.v2.jobhistory.JobHistoryUtils;
import org.apache.hadoop.mapreduce.v2.util.MRApps;
import org.apache.hadoop.security.Credentials;
import org.apache.hadoop.security.SecurityUtil;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.security.authorize.AccessControlList;
import org.apache.hadoop.security.token.Token;
import org.apache.hadoop.yarn.api.ApplicationConstants;
import org.apache.hadoop.yarn.api.ApplicationConstants.Environment;
import org.apache.hadoop.yarn.api.records.ApplicationAccessType;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.ApplicationReport;
import org.apache.hadoop.yarn.api.records.ApplicationSubmissionContext;
import org.apache.hadoop.yarn.api.records.ContainerLaunchContext;
import org.apache.hadoop.yarn.api.records.LocalResource;
import org.apache.hadoop.yarn.api.records.LocalResourceType;
import org.apache.hadoop.yarn.api.records.LocalResourceVisibility;
import org.apache.hadoop.yarn.api.records.Resource;
import org.apache.hadoop.yarn.api.records.URL;
import org.apache.hadoop.yarn.api.records.YarnApplicationState;
import org.apache.hadoop.yarn.conf.YarnConfiguration;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.apache.hadoop.yarn.factories.RecordFactory;
import org.apache.hadoop.yarn.factory.providers.RecordFactoryProvider;
import org.apache.hadoop.yarn.security.client.RMDelegationTokenSelector;
import org.apache.hadoop.yarn.util.ConverterUtils;
import com.google.common.annotations.VisibleForTesting;
/**
* This class enables the current JobClient (0.22 hadoop) to run on YARN.
*/
@SuppressWarnings("unchecked")
public class YARNRunner implements ClientProtocol {
private static final Log LOG = LogFactory.getLog(YARNRunner.class);
private final RecordFactory recordFactory = RecordFactoryProvider.getRecordFactory(null);
private ResourceMgrDelegate resMgrDelegate;
private ClientCache clientCache;
private Configuration conf;
private final FileContext defaultFileContext;
/**
* Yarn runner incapsulates the client interface of
* yarn
* @param conf the configuration object for the client
*/
public YARNRunner(Configuration conf) {
this(conf, new ResourceMgrDelegate(new YarnConfiguration(conf)));
}
/**
* Similar to {@link #YARNRunner(Configuration)} but allowing injecting
* {@link ResourceMgrDelegate}. Enables mocking and testing.
* @param conf the configuration object for the client
* @param resMgrDelegate the resourcemanager client handle.
*/
public YARNRunner(Configuration conf, ResourceMgrDelegate resMgrDelegate) {
this(conf, resMgrDelegate, new ClientCache(conf, resMgrDelegate));
}
/**
* Similar to {@link YARNRunner#YARNRunner(Configuration, ResourceMgrDelegate)}
* but allowing injecting {@link ClientCache}. Enable mocking and testing.
* @param conf the configuration object
* @param resMgrDelegate the resource manager delegate
* @param clientCache the client cache object.
*/
public YARNRunner(Configuration conf, ResourceMgrDelegate resMgrDelegate,
ClientCache clientCache) {
this.conf = conf;
try {
this.resMgrDelegate = resMgrDelegate;
this.clientCache = clientCache;
this.defaultFileContext = FileContext.getFileContext(this.conf);
} catch (UnsupportedFileSystemException ufe) {
throw new RuntimeException("Error in instantiating YarnClient", ufe);
}
}
@Private
/**
* Used for testing mostly.
* @param resMgrDelegate the resource manager delegate to set to.
*/
public void setResourceMgrDelegate(ResourceMgrDelegate resMgrDelegate) {
this.resMgrDelegate = resMgrDelegate;
}
@Override
public void cancelDelegationToken(Token<DelegationTokenIdentifier> arg0)
throws IOException, InterruptedException {
throw new UnsupportedOperationException("Use Token.renew instead");
}
@Override
public TaskTrackerInfo[] getActiveTrackers() throws IOException,
InterruptedException {
return resMgrDelegate.getActiveTrackers();
}
@Override
public JobStatus[] getAllJobs() throws IOException, InterruptedException {
return resMgrDelegate.getAllJobs();
}
@Override
public TaskTrackerInfo[] getBlacklistedTrackers() throws IOException,
InterruptedException {
return resMgrDelegate.getBlacklistedTrackers();
}
@Override
public ClusterMetrics getClusterMetrics() throws IOException,
InterruptedException {
return resMgrDelegate.getClusterMetrics();
}
@VisibleForTesting
void addHistoryToken(Credentials ts) throws IOException, InterruptedException {
/* check if we have a hsproxy, if not, no need */
MRClientProtocol hsProxy = clientCache.getInitializedHSProxy();
if (UserGroupInformation.isSecurityEnabled() && (hsProxy != null)) {
/*
* note that get delegation token was called. Again this is hack for oozie
* to make sure we add history server delegation tokens to the credentials
*/
RMDelegationTokenSelector tokenSelector = new RMDelegationTokenSelector();
Text service = resMgrDelegate.getRMDelegationTokenService();
if (tokenSelector.selectToken(service, ts.getAllTokens()) != null) {
Text hsService = SecurityUtil.buildTokenService(hsProxy
.getConnectAddress());
if (ts.getToken(hsService) == null) {
ts.addToken(hsService, getDelegationTokenFromHS(hsProxy));
}
}
}
}
@VisibleForTesting
Token<?> getDelegationTokenFromHS(MRClientProtocol hsProxy)
throws IOException, InterruptedException {
GetDelegationTokenRequest request = recordFactory
.newRecordInstance(GetDelegationTokenRequest.class);
request.setRenewer(Master.getMasterPrincipal(conf));
org.apache.hadoop.yarn.api.records.Token mrDelegationToken;
mrDelegationToken = hsProxy.getDelegationToken(request)
.getDelegationToken();
return ConverterUtils.convertFromYarn(mrDelegationToken,
hsProxy.getConnectAddress());
}
@Override
public Token<DelegationTokenIdentifier> getDelegationToken(Text renewer)
throws IOException, InterruptedException {
// The token is only used for serialization. So the type information
// mismatch should be fine.
return resMgrDelegate.getDelegationToken(renewer);
}
@Override
public String getFilesystemName() throws IOException, InterruptedException {
return resMgrDelegate.getFilesystemName();
}
@Override
public JobID getNewJobID() throws IOException, InterruptedException {
return resMgrDelegate.getNewJobID();
}
@Override
public QueueInfo getQueue(String queueName) throws IOException,
InterruptedException {
return resMgrDelegate.getQueue(queueName);
}
@Override
public QueueAclsInfo[] getQueueAclsForCurrentUser() throws IOException,
InterruptedException {
return resMgrDelegate.getQueueAclsForCurrentUser();
}
@Override
public QueueInfo[] getQueues() throws IOException, InterruptedException {
return resMgrDelegate.getQueues();
}
@Override
public QueueInfo[] getRootQueues() throws IOException, InterruptedException {
return resMgrDelegate.getRootQueues();
}
@Override
public QueueInfo[] getChildQueues(String parent) throws IOException,
InterruptedException {
return resMgrDelegate.getChildQueues(parent);
}
@Override
public String getStagingAreaDir() throws IOException, InterruptedException {
return resMgrDelegate.getStagingAreaDir();
}
@Override
public String getSystemDir() throws IOException, InterruptedException {
return resMgrDelegate.getSystemDir();
}
@Override
public long getTaskTrackerExpiryInterval() throws IOException,
InterruptedException {
return resMgrDelegate.getTaskTrackerExpiryInterval();
}
@Override
public JobStatus submitJob(JobID jobId, String jobSubmitDir, Credentials ts)
throws IOException, InterruptedException {
addHistoryToken(ts);
// Construct necessary information to start the MR AM
ApplicationSubmissionContext appContext =
createApplicationSubmissionContext(conf, jobSubmitDir, ts);
// Submit to ResourceManager
try {
ApplicationId applicationId =
resMgrDelegate.submitApplication(appContext);
ApplicationReport appMaster = resMgrDelegate
.getApplicationReport(applicationId);
String diagnostics =
(appMaster == null ?
"application report is null" : appMaster.getDiagnostics());
if (appMaster == null
|| appMaster.getYarnApplicationState() == YarnApplicationState.FAILED
|| appMaster.getYarnApplicationState() == YarnApplicationState.KILLED) {
throw new IOException("Failed to run job : " +
diagnostics);
}
return clientCache.getClient(jobId).getJobStatus(jobId);
} catch (YarnException e) {
throw new IOException(e);
}
}
private LocalResource createApplicationResource(FileContext fs, Path p, LocalResourceType type)
throws IOException {
LocalResource rsrc = recordFactory.newRecordInstance(LocalResource.class);
FileStatus rsrcStat = fs.getFileStatus(p);
rsrc.setResource(ConverterUtils.getYarnUrlFromPath(fs
.getDefaultFileSystem().resolvePath(rsrcStat.getPath())));
rsrc.setSize(rsrcStat.getLen());
rsrc.setTimestamp(rsrcStat.getModificationTime());
rsrc.setType(type);
rsrc.setVisibility(LocalResourceVisibility.APPLICATION);
return rsrc;
}
public ApplicationSubmissionContext createApplicationSubmissionContext(
Configuration jobConf,
String jobSubmitDir, Credentials ts) throws IOException {
ApplicationId applicationId = resMgrDelegate.getApplicationId();
// Setup resource requirements
Resource capability = recordFactory.newRecordInstance(Resource.class);
capability.setMemory(
conf.getInt(
MRJobConfig.MR_AM_VMEM_MB, MRJobConfig.DEFAULT_MR_AM_VMEM_MB
)
);
capability.setVirtualCores(
conf.getInt(
MRJobConfig.MR_AM_CPU_VCORES, MRJobConfig.DEFAULT_MR_AM_CPU_VCORES
)
);
LOG.debug("AppMaster capability = " + capability);
// Setup LocalResources
Map<String, LocalResource> localResources =
new HashMap<String, LocalResource>();
Path jobConfPath = new Path(jobSubmitDir, MRJobConfig.JOB_CONF_FILE);
URL yarnUrlForJobSubmitDir = ConverterUtils
.getYarnUrlFromPath(defaultFileContext.getDefaultFileSystem()
.resolvePath(
defaultFileContext.makeQualified(new Path(jobSubmitDir))));
LOG.debug("Creating setup context, jobSubmitDir url is "
+ yarnUrlForJobSubmitDir);
localResources.put(MRJobConfig.JOB_CONF_FILE,
createApplicationResource(defaultFileContext,
jobConfPath, LocalResourceType.FILE));
if (jobConf.get(MRJobConfig.JAR) != null) {
Path jobJarPath = new Path(jobConf.get(MRJobConfig.JAR));
LocalResource rc = createApplicationResource(defaultFileContext,
jobJarPath,
LocalResourceType.PATTERN);
String pattern = conf.getPattern(JobContext.JAR_UNPACK_PATTERN,
JobConf.UNPACK_JAR_PATTERN_DEFAULT).pattern();
rc.setPattern(pattern);
localResources.put(MRJobConfig.JOB_JAR, rc);
} else {
// Job jar may be null. For e.g, for pipes, the job jar is the hadoop
// mapreduce jar itself which is already on the classpath.
LOG.info("Job jar is not present. "
+ "Not adding any jar to the list of resources.");
}
// TODO gross hack
for (String s : new String[] {
MRJobConfig.JOB_SPLIT,
MRJobConfig.JOB_SPLIT_METAINFO }) {
localResources.put(
MRJobConfig.JOB_SUBMIT_DIR + "/" + s,
createApplicationResource(defaultFileContext,
new Path(jobSubmitDir, s), LocalResourceType.FILE));
}
// Setup security tokens
DataOutputBuffer dob = new DataOutputBuffer();
ts.writeTokenStorageToStream(dob);
ByteBuffer securityTokens = ByteBuffer.wrap(dob.getData(), 0, dob.getLength());
// Setup the command to run the AM
List<String> vargs = new ArrayList<String>(8);
/*vargs.add(MRApps.crossPlatformifyMREnv(jobConf, Environment.JAVA_HOME)
+ "/bin/java");*/
vargs.add("$JAVA_HOME/bin/java");
// TODO: why do we use 'conf' some places and 'jobConf' others?
long logSize = jobConf.getLong(MRJobConfig.MR_AM_LOG_KB,
MRJobConfig.DEFAULT_MR_AM_LOG_KB) << 10;
String logLevel = jobConf.get(
MRJobConfig.MR_AM_LOG_LEVEL, MRJobConfig.DEFAULT_MR_AM_LOG_LEVEL);
int numBackups = jobConf.getInt(MRJobConfig.MR_AM_LOG_BACKUPS,
MRJobConfig.DEFAULT_MR_AM_LOG_BACKUPS);
MRApps.addLog4jSystemProperties(logLevel, logSize, numBackups, vargs);
// Check for Java Lib Path usage in MAP and REDUCE configs
warnForJavaLibPath(conf.get(MRJobConfig.MAP_JAVA_OPTS,""), "map",
MRJobConfig.MAP_JAVA_OPTS, MRJobConfig.MAP_ENV);
warnForJavaLibPath(conf.get(MRJobConfig.MAPRED_MAP_ADMIN_JAVA_OPTS,""), "map",
MRJobConfig.MAPRED_MAP_ADMIN_JAVA_OPTS, MRJobConfig.MAPRED_ADMIN_USER_ENV);
warnForJavaLibPath(conf.get(MRJobConfig.REDUCE_JAVA_OPTS,""), "reduce",
MRJobConfig.REDUCE_JAVA_OPTS, MRJobConfig.REDUCE_ENV);
warnForJavaLibPath(conf.get(MRJobConfig.MAPRED_REDUCE_ADMIN_JAVA_OPTS,""), "reduce",
MRJobConfig.MAPRED_REDUCE_ADMIN_JAVA_OPTS, MRJobConfig.MAPRED_ADMIN_USER_ENV);
// Add AM admin command opts before user command opts
// so that it can be overridden by user
String mrAppMasterAdminOptions = conf.get(MRJobConfig.MR_AM_ADMIN_COMMAND_OPTS,
MRJobConfig.DEFAULT_MR_AM_ADMIN_COMMAND_OPTS);
warnForJavaLibPath(mrAppMasterAdminOptions, "app master",
MRJobConfig.MR_AM_ADMIN_COMMAND_OPTS, MRJobConfig.MR_AM_ADMIN_USER_ENV);
vargs.add(mrAppMasterAdminOptions);
// Add AM user command opts
String mrAppMasterUserOptions = conf.get(MRJobConfig.MR_AM_COMMAND_OPTS,
MRJobConfig.DEFAULT_MR_AM_COMMAND_OPTS);
warnForJavaLibPath(mrAppMasterUserOptions, "app master",
MRJobConfig.MR_AM_COMMAND_OPTS, MRJobConfig.MR_AM_ENV);
vargs.add(mrAppMasterUserOptions);
vargs.add(MRJobConfig.APPLICATION_MASTER_CLASS);
vargs.add("1>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR +
Path.SEPARATOR + ApplicationConstants.STDOUT);
vargs.add("2>" + ApplicationConstants.LOG_DIR_EXPANSION_VAR +
Path.SEPARATOR + ApplicationConstants.STDERR);
Vector<String> vargsFinal = new Vector<String>(8);
// Final command
StringBuilder mergedCommand = new StringBuilder();
for (CharSequence str : vargs) {
mergedCommand.append(str).append(" ");
}
vargsFinal.add(mergedCommand.toString());
LOG.debug("Command to launch container for ApplicationMaster is : "
+ mergedCommand);
// Setup the CLASSPATH in environment
// i.e. add { Hadoop jars, job jar, CWD } to classpath.
Map<String, String> environment = new HashMap<String, String>();
MRApps.setClasspath(environment, conf);
// Setup the environment variables for Admin first
MRApps.setEnvFromInputString(environment,
conf.get(MRJobConfig.MR_AM_ADMIN_USER_ENV), conf);
// Setup the environment variables (LD_LIBRARY_PATH, etc)
MRApps.setEnvFromInputString(environment,
conf.get(MRJobConfig.MR_AM_ENV), conf);
// Parse distributed cache
MRApps.setupDistributedCache(jobConf, localResources);
Map<ApplicationAccessType, String> acls
= new HashMap<ApplicationAccessType, String>(2);
acls.put(ApplicationAccessType.VIEW_APP, jobConf.get(
MRJobConfig.JOB_ACL_VIEW_JOB, MRJobConfig.DEFAULT_JOB_ACL_VIEW_JOB));
acls.put(ApplicationAccessType.MODIFY_APP, jobConf.get(
MRJobConfig.JOB_ACL_MODIFY_JOB,
MRJobConfig.DEFAULT_JOB_ACL_MODIFY_JOB));
replaceEnvironment(environment);
// Setup ContainerLaunchContext for AM container
ContainerLaunchContext amContainer =
ContainerLaunchContext.newInstance(localResources, environment,
vargsFinal, null, securityTokens, acls);
Collection<String> tagsFromConf =
jobConf.getTrimmedStringCollection(MRJobConfig.JOB_TAGS);
// Set up the ApplicationSubmissionContext
ApplicationSubmissionContext appContext =
recordFactory.newRecordInstance(ApplicationSubmissionContext.class);
appContext.setApplicationId(applicationId); // ApplicationId
appContext.setQueue( // Queue name
jobConf.get(JobContext.QUEUE_NAME,
YarnConfiguration.DEFAULT_QUEUE_NAME));
appContext.setApplicationName( // Job name
jobConf.get(JobContext.JOB_NAME,
YarnConfiguration.DEFAULT_APPLICATION_NAME));
appContext.setCancelTokensWhenComplete(
conf.getBoolean(MRJobConfig.JOB_CANCEL_DELEGATION_TOKEN, true));
appContext.setAMContainerSpec(amContainer); // AM Container
appContext.setMaxAppAttempts(
conf.getInt(MRJobConfig.MR_AM_MAX_ATTEMPTS,
MRJobConfig.DEFAULT_MR_AM_MAX_ATTEMPTS));
appContext.setResource(capability);
appContext.setApplicationType(MRJobConfig.MR_APPLICATION_TYPE);
if (tagsFromConf != null && !tagsFromConf.isEmpty()) {
appContext.setApplicationTags(new HashSet<String>(tagsFromConf));
}
return appContext;
}
@Override
public void setJobPriority(JobID arg0, String arg1) throws IOException,
InterruptedException {
resMgrDelegate.setJobPriority(arg0, arg1);
}
@Override
public long getProtocolVersion(String arg0, long arg1) throws IOException {
return resMgrDelegate.getProtocolVersion(arg0, arg1);
}
@Override
public long renewDelegationToken(Token<DelegationTokenIdentifier> arg0)
throws IOException, InterruptedException {
throw new UnsupportedOperationException("Use Token.renew instead");
}
@Override
public Counters getJobCounters(JobID arg0) throws IOException,
InterruptedException {
return clientCache.getClient(arg0).getJobCounters(arg0);
}
@Override
public String getJobHistoryDir() throws IOException, InterruptedException {
return JobHistoryUtils.getConfiguredHistoryServerDoneDirPrefix(conf);
}
@Override
public JobStatus getJobStatus(JobID jobID) throws IOException,
InterruptedException {
JobStatus status = clientCache.getClient(jobID).getJobStatus(jobID);
return status;
}
@Override
public TaskCompletionEvent[] getTaskCompletionEvents(JobID arg0, int arg1,
int arg2) throws IOException, InterruptedException {
return clientCache.getClient(arg0).getTaskCompletionEvents(arg0, arg1, arg2);
}
@Override
public String[] getTaskDiagnostics(TaskAttemptID arg0) throws IOException,
InterruptedException {
return clientCache.getClient(arg0.getJobID()).getTaskDiagnostics(arg0);
}
@Override
public TaskReport[] getTaskReports(JobID jobID, TaskType taskType)
throws IOException, InterruptedException {
return clientCache.getClient(jobID)
.getTaskReports(jobID, taskType);
}
@Override
public void killJob(JobID arg0) throws IOException, InterruptedException {
/* check if the status is not running, if not send kill to RM */
JobStatus status = clientCache.getClient(arg0).getJobStatus(arg0);
if (status.getState() != JobStatus.State.RUNNING) {
try {
resMgrDelegate.killApplication(TypeConverter.toYarn(arg0).getAppId());
} catch (YarnException e) {
throw new IOException(e);
}
return;
}
try {
/* send a kill to the AM */
clientCache.getClient(arg0).killJob(arg0);
long currentTimeMillis = System.currentTimeMillis();
long timeKillIssued = currentTimeMillis;
while ((currentTimeMillis < timeKillIssued + 10000L) && (status.getState()
!= JobStatus.State.KILLED)) {
try {
Thread.sleep(1000L);
} catch(InterruptedException ie) {
/** interrupted, just break */
break;
}
currentTimeMillis = System.currentTimeMillis();
status = clientCache.getClient(arg0).getJobStatus(arg0);
}
} catch(IOException io) {
LOG.debug("Error when checking for application status", io);
}
if (status.getState() != JobStatus.State.KILLED) {
try {
resMgrDelegate.killApplication(TypeConverter.toYarn(arg0).getAppId());
} catch (YarnException e) {
throw new IOException(e);
}
}
}
@Override
public boolean killTask(TaskAttemptID arg0, boolean arg1) throws IOException,
InterruptedException {
return clientCache.getClient(arg0.getJobID()).killTask(arg0, arg1);
}
@Override
public AccessControlList getQueueAdmins(String arg0) throws IOException {
return new AccessControlList("*");
}
@Override
public JobTrackerStatus getJobTrackerStatus() throws IOException,
InterruptedException {
return JobTrackerStatus.RUNNING;
}
@Override
public ProtocolSignature getProtocolSignature(String protocol,
long clientVersion, int clientMethodsHash) throws IOException {
return ProtocolSignature.getProtocolSignature(this, protocol, clientVersion,
clientMethodsHash);
}
@Override
public LogParams getLogFileParams(JobID jobID, TaskAttemptID taskAttemptID)
throws IOException {
return clientCache.getClient(jobID).getLogFilePath(jobID, taskAttemptID);
}
private static void warnForJavaLibPath(String opts, String component,
String javaConf, String envConf) {
if (opts != null && opts.contains("-Djava.library.path")) {
LOG.warn("Usage of -Djava.library.path in " + javaConf + " can cause " +
"programs to no longer function if hadoop native libraries " +
"are used. These values should be set as part of the " +
"LD_LIBRARY_PATH in the " + component + " JVM env using " +
envConf + " config settings.");
}
}
private void replaceEnvironment(Map<String, String> environment) {
String tmpClassPath = environment.get("CLASSPATH");
tmpClassPath=tmpClassPath.replaceAll(";", ":");
tmpClassPath=tmpClassPath.replaceAll("%PWD%", "\\$PWD");
tmpClassPath=tmpClassPath.replaceAll("%HADOOP_MAPRED_HOME%", "\\$HADOOP_MAPRED_HOME");
tmpClassPath= tmpClassPath.replaceAll("\\\\", "/" );
environment.put("CLASSPATH",tmpClassPath);
}
}
四、MR調用的代碼需要改變：
a、src不能有伺服器的hadoop配置檔案
b、在調用時使用：
Configuration config = new Configuration();
config.set("fs.defaultFS", "hdfs://node7:8020");
config.set("yarn.resourcemanager.hostname", "node7");
即将RunJob中的Configuration config = new Configuration();後面再加上兩行
config.set("fs.defaultFS", "hdfs://node1:8020"); //自定義nammenode的主機名和端口号
config.set("yarn.resourcemanager.hostname", "node1"); //自定義resource的主機名
将
Job job =Job.getInstance();
改為
Job job =Job.getInstance(config);
五、運作
在RunJob.java上右鍵，運作項目
控制台顯示如下，說明執行成功
2017-08-04 00:12:21,414 WARN [main] util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
2017-08-04 00:12:25,919 INFO [main] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(1019)) - session.id is deprecated. Instead, use dfs.metrics.session-id
2017-08-04 00:12:25,920 INFO [main] jvm.JvmMetrics (JvmMetrics.java:init(76)) - Initializing JVM Metrics with processName=JobTracker, sessionId=
2017-08-04 00:12:26,633 WARN [main] mapreduce.JobSubmitter (JobSubmitter.java:copyAndConfigureFiles(150)) - Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
2017-08-04 00:12:26,776 WARN [main] mapreduce.JobSubmitter (JobSubmitter.java:copyAndConfigureFiles(259)) - No job jar file set. User classes may not be found. See Job or Job#setJar(String).
2017-08-04 00:12:26,880 INFO [main] input.FileInputFormat (FileInputFormat.java:listStatus(281)) - Total input paths to process : 1
2017-08-04 00:12:27,473 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:submitJobInternal(396)) - number of splits:1
2017-08-04 00:12:27,985 INFO [main] mapreduce.JobSubmitter (JobSubmitter.java:printTokens(479)) - Submitting tokens for job: job_local1103349499_0001
2017-08-04 00:12:28,462 WARN [main] conf.Configuration (Configuration.java:loadProperty(2368)) - file:/tmp/hadoop-ZhangJintao/mapred/staging/ZhangJintao1103349499/.staging/job_local1103349499_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2017-08-04 00:12:28,495 WARN [main] conf.Configuration (Configuration.java:loadProperty(2368)) - file:/tmp/hadoop-ZhangJintao/mapred/staging/ZhangJintao1103349499/.staging/job_local1103349499_0001/job.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2017-08-04 00:12:29,512 WARN [main] conf.Configuration (Configuration.java:loadProperty(2368)) - file:/tmp/hadoop-ZhangJintao/mapred/local/localRunner/ZhangJintao/job_local1103349499_0001/job_local1103349499_0001.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.retry.interval; Ignoring.
2017-08-04 00:12:29,595 WARN [main] conf.Configuration (Configuration.java:loadProperty(2368)) - file:/tmp/hadoop-ZhangJintao/mapred/local/localRunner/ZhangJintao/job_local1103349499_0001/job_local1103349499_0001.xml:an attempt to override final parameter: mapreduce.job.end-notification.max.attempts; Ignoring.
2017-08-04 00:12:29,603 INFO [main] mapreduce.Job (Job.java:submit(1289)) - The url to track the job: http://localhost:8080/
2017-08-04 00:12:29,604 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1334)) - Running job: job_local1103349499_0001
2017-08-04 00:12:29,610 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:createOutputCommitter(471)) - OutputCommitter set in config null
2017-08-04 00:12:29,620 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:createOutputCommitter(489)) - OutputCommitter is org.apache.hadoop.mapreduce.lib.output.FileOutputCommitter
2017-08-04 00:12:30,034 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(448)) - Waiting for map tasks
2017-08-04 00:12:30,035 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:run(224)) - Starting task: attempt_local1103349499_0001_m_000000_0
2017-08-04 00:12:30,068 INFO [LocalJobRunner Map Task Executor #0] util.ProcfsBasedProcessTree (ProcfsBasedProcessTree.java:isAvailable(181)) - ProcfsBasedProcessTree currently is supported only on Linux.
2017-08-04 00:12:30,156 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:initialize(587)) - Using ResourceCalculatorProcessTree : [email protected]
2017-08-04 00:12:30,163 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:runNewMapper(733)) - Processing split: hdfs://node1:8020/usr/input/data.txt:0+49
2017-08-04 00:12:30,186 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:createSortingCollector(388)) - Map output collector class = org.apache.hadoop.mapred.MapTask$MapOutputBuffer
2017-08-04 00:12:30,270 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:setEquator(1182)) - (EQUATOR) 0 kvi 26214396(104857584)
2017-08-04 00:12:30,270 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(975)) - mapreduce.task.io.sort.mb: 100
2017-08-04 00:12:30,271 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(976)) - soft limit at 83886080
2017-08-04 00:12:30,271 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(977)) - bufstart = 0; bufvoid = 104857600
2017-08-04 00:12:30,271 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:init(978)) - kvstart = 26214396; length = 6553600
2017-08-04 00:12:30,607 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1355)) - Job job_local1103349499_0001 running in uber mode : false
2017-08-04 00:12:30,609 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) - map 0% reduce 0%
2017-08-04 00:12:31,960 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) -
2017-08-04 00:12:31,964 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1437)) - Starting flush of map output
2017-08-04 00:12:31,964 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1455)) - Spilling map output
2017-08-04 00:12:31,964 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1456)) - bufstart = 0; bufend = 76; bufvoid = 104857600
2017-08-04 00:12:31,964 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:flush(1458)) - kvstart = 26214396(104857584); kvend = 26214372(104857488); length = 25/6553600
2017-08-04 00:12:32,012 INFO [LocalJobRunner Map Task Executor #0] mapred.MapTask (MapTask.java:sortAndSpill(1641)) - Finished spill 0
2017-08-04 00:12:32,047 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:done(1001)) - Task:attempt_local1103349499_0001_m_000000_0 is done. And is in the process of committing
2017-08-04 00:12:32,061 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) - map
2017-08-04 00:12:32,062 INFO [LocalJobRunner Map Task Executor #0] mapred.Task (Task.java:sendDone(1121)) - Task 'attempt_local1103349499_0001_m_000000_0' done.
2017-08-04 00:12:32,062 INFO [LocalJobRunner Map Task Executor #0] mapred.LocalJobRunner (LocalJobRunner.java:run(249)) - Finishing task: attempt_local1103349499_0001_m_000000_0
2017-08-04 00:12:32,062 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(456)) - map task executor complete.
2017-08-04 00:12:32,067 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(448)) - Waiting for reduce tasks
2017-08-04 00:12:32,067 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:run(302)) - Starting task: attempt_local1103349499_0001_r_000000_0
2017-08-04 00:12:32,087 INFO [pool-6-thread-1] util.ProcfsBasedProcessTree (ProcfsBasedProcessTree.java:isAvailable(181)) - ProcfsBasedProcessTree currently is supported only on Linux.
2017-08-04 00:12:32,162 INFO [pool-6-thread-1] mapred.Task (Task.java:initialize(587)) - Using ResourceCalculatorProcessTree : [email protected]
2017-08-04 00:12:32,167 INFO [pool-6-thread-1] mapred.ReduceTask (ReduceTask.java:run(362)) - Using ShuffleConsumerPlugin: [email protected]
2017-08-04 00:12:32,198 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:<init>(193)) - MergerManager: memoryLimit=1317902720, maxSingleShuffleLimit=329475680, mergeThreshold=869815808, ioSortFactor=10, memToMemMergeOutputsThreshold=10
2017-08-04 00:12:32,217 INFO [EventFetcher for fetching Map Completion Events] reduce.EventFetcher (EventFetcher.java:run(61)) - attempt_local1103349499_0001_r_000000_0 Thread started: EventFetcher for fetching Map Completion Events
2017-08-04 00:12:32,299 INFO [localfetcher#1] reduce.LocalFetcher (LocalFetcher.java:copyMapOutput(140)) - localfetcher#1 about to shuffle output of map attempt_local1103349499_0001_m_000000_0 decomp: 92 len: 96 to MEMORY
2017-08-04 00:12:32,305 INFO [localfetcher#1] reduce.InMemoryMapOutput (InMemoryMapOutput.java:shuffle(100)) - Read 92 bytes from map-output for attempt_local1103349499_0001_m_000000_0
2017-08-04 00:12:32,309 INFO [localfetcher#1] reduce.MergeManagerImpl (MergeManagerImpl.java:closeInMemoryFile(307)) - closeInMemoryFile -> map-output of size: 92, inMemoryMapOutputs.size() -> 1, commitMemory -> 0, usedMemory ->92
2017-08-04 00:12:32,312 INFO [EventFetcher for fetching Map Completion Events] reduce.EventFetcher (EventFetcher.java:run(76)) - EventFetcher is interrupted.. Returning
2017-08-04 00:12:32,332 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) - 1 / 1 copied.
2017-08-04 00:12:32,332 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(667)) - finalMerge called with 1 in-memory map-outputs and 0 on-disk map-outputs
2017-08-04 00:12:32,351 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(591)) - Merging 1 sorted segments
2017-08-04 00:12:32,351 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(690)) - Down to the last merge-pass, with 1 segments left of total size: 83 bytes
2017-08-04 00:12:32,357 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(742)) - Merged 1 segments, 92 bytes to disk to satisfy reduce memory limit
2017-08-04 00:12:32,358 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(772)) - Merging 1 files, 96 bytes from disk
2017-08-04 00:12:32,359 INFO [pool-6-thread-1] reduce.MergeManagerImpl (MergeManagerImpl.java:finalMerge(787)) - Merging 0 segments, 0 bytes from memory into reduce
2017-08-04 00:12:32,359 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(591)) - Merging 1 sorted segments
2017-08-04 00:12:32,360 INFO [pool-6-thread-1] mapred.Merger (Merger.java:merge(690)) - Down to the last merge-pass, with 1 segments left of total size: 83 bytes
2017-08-04 00:12:32,361 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) - 1 / 1 copied.
2017-08-04 00:12:32,417 INFO [pool-6-thread-1] Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(1019)) - mapred.skip.on is deprecated. Instead, use mapreduce.job.skiprecords
2017-08-04 00:12:32,663 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) - map 100% reduce 0%
2017-08-04 00:12:33,108 INFO [pool-6-thread-1] mapred.Task (Task.java:done(1001)) - Task:attempt_local1103349499_0001_r_000000_0 is done. And is in the process of committing
2017-08-04 00:12:33,112 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) - 1 / 1 copied.
2017-08-04 00:12:33,112 INFO [pool-6-thread-1] mapred.Task (Task.java:commit(1162)) - Task attempt_local1103349499_0001_r_000000_0 is allowed to commit now
2017-08-04 00:12:33,130 INFO [pool-6-thread-1] output.FileOutputCommitter (FileOutputCommitter.java:commitTask(439)) - Saved output of task 'attempt_local1103349499_0001_r_000000_0' to hdfs://node1:8020/usr/output/_temporary/0/task_local1103349499_0001_r_000000
2017-08-04 00:12:33,131 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:statusUpdate(591)) - reduce > reduce
2017-08-04 00:12:33,132 INFO [pool-6-thread-1] mapred.Task (Task.java:sendDone(1121)) - Task 'attempt_local1103349499_0001_r_000000_0' done.
2017-08-04 00:12:33,132 INFO [pool-6-thread-1] mapred.LocalJobRunner (LocalJobRunner.java:run(325)) - Finishing task: attempt_local1103349499_0001_r_000000_0
2017-08-04 00:12:33,132 INFO [Thread-12] mapred.LocalJobRunner (LocalJobRunner.java:runTasks(456)) - reduce task executor complete.
2017-08-04 00:12:33,663 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1362)) - map 100% reduce 100%
2017-08-04 00:12:33,664 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1373)) - Job job_local1103349499_0001 completed successfully
2017-08-04 00:12:33,686 INFO [main] mapreduce.Job (Job.java:monitorAndPrintJob(1380)) - Counters: 38
File System Counters
FILE: Number of bytes read=550
FILE: Number of bytes written=482798
FILE: Number of read operations=0
FILE: Number of large read operations=0
FILE: Number of write operations=0
HDFS: Number of bytes read=98
HDFS: Number of bytes written=45
HDFS: Number of read operations=17
HDFS: Number of large read operations=0
HDFS: Number of write operations=4
Map-Reduce Framework
Map input records=3
Map output records=7
Map output bytes=76
Map output materialized bytes=96
Input split bytes=101
Combine input records=0
Combine output records=0
Reduce input groups=5
Reduce shuffle bytes=96
Reduce input records=7
Reduce output records=5
Spilled Records=14
Shuffled Maps =1
Failed Shuffles=0
Merged Map outputs=1
GC time elapsed (ms)=0
CPU time spent (ms)=0
Physical memory (bytes) snapshot=0
Virtual memory (bytes) snapshot=0
Total committed heap usage (bytes)=465567744
Shuffle Errors
BAD_ID=0
CONNECTION=0
IO_ERROR=0
WRONG_LENGTH=0
WRONG_MAP=0
WRONG_REDUCE=0
File Input Format Counters
Bytes Read=49
File Output Format Counters
Bytes Written=45
JOB 執行成功
執行成功後，我們重新整理hdfsusr目錄，可以看到如下結果
注：本地測試環境隻适用于少量資料的本地測試，資料量大了之後會很慢很慢。是以，我們有必要引入伺服器測試環境。
伺服器環境（打jar包上傳執行）：
直接在伺服器上，使用指令的方式調用，執行過程也在伺服器上
a、把MR程式打包（jar），傳送到伺服器上
b、通過： hadoop jar jar路徑 類的全限定名
伺服器環境（本地調用，執行過程在伺服器上）：
在本地直接調用，執行過程在伺服器上（真正企業運作環境）
a、把MR程式打包（jar），直接放到本地
b、修改hadoop的源碼 ，注意：確定項目的lib需要真實安裝的jdk的lib
如下圖分别在org.apache.hadoop.io.nativeio 、org.apache.hadoop.mapred 兩個包下添加兩個類，代碼上方有，請自行黏貼
c、增加一個屬性：
config.set("mapred.jar", "C:\\Users\\Administrator\\Desktop\\wc.jar");
d、将Hadoop配置檔案拷貝至src根目錄中（如下圖）：
e、本地執行RunJob的main方法