hadoop JobResourceUploader 源码
haddop JobResourceUploader 代码
文件路径：/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/JobResourceUploader.java
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.mapreduce;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Collection;
import java.util.HashMap;
import java.util.LinkedList;
import java.util.LinkedHashMap;
import java.util.Map;
import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceStability.Unstable;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.hdfs.DistributedFileSystem;
import org.apache.hadoop.hdfs.protocol.SystemErasureCodingPolicies;
import org.apache.hadoop.ipc.RemoteException;
import org.apache.hadoop.ipc.RpcNoSuchMethodException;
import org.apache.hadoop.mapreduce.filecache.ClientDistributedCacheManager;
import org.apache.hadoop.mapreduce.filecache.DistributedCache;
import org.apache.hadoop.yarn.api.records.ApplicationId;
import org.apache.hadoop.yarn.api.records.URL;
import org.apache.hadoop.yarn.client.api.SharedCacheClient;
import org.apache.hadoop.yarn.exceptions.YarnException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.apache.hadoop.classification.VisibleForTesting;
/**
* This class is responsible for uploading resources from the client to HDFS
* that are associated with a MapReduce job.
*/
@Private
@Unstable
class JobResourceUploader {
protected static final Logger LOG =
LoggerFactory.getLogger(JobResourceUploader.class);
private static final String ROOT_PATH = "/";
private final boolean useWildcard;
private final FileSystem jtFs;
private SharedCacheClient scClient = null;
private SharedCacheConfig scConfig = new SharedCacheConfig();
private ApplicationId appId = null;
JobResourceUploader(FileSystem submitFs, boolean useWildcard) {
this.jtFs = submitFs;
this.useWildcard = useWildcard;
}
private void initSharedCache(JobID jobid, Configuration conf) {
this.scConfig.init(conf);
if (this.scConfig.isSharedCacheEnabled()) {
this.scClient = createSharedCacheClient(conf);
appId = jobIDToAppId(jobid);
}
}
/*
* We added this method so that we could do the conversion between JobId and
* ApplicationId for the shared cache client. This logic is very similar to
* the org.apache.hadoop.mapreduce.TypeConverter#toYarn method. We don't use
* that because mapreduce-client-core can not depend on
* mapreduce-client-common.
*/
private ApplicationId jobIDToAppId(JobID jobId) {
return ApplicationId.newInstance(Long.parseLong(jobId.getJtIdentifier()),
jobId.getId());
}
private void stopSharedCache() {
if (scClient != null) {
scClient.stop();
scClient = null;
}
}
/**
* Create, initialize and start a new shared cache client.
*/
@VisibleForTesting
protected SharedCacheClient createSharedCacheClient(Configuration conf) {
SharedCacheClient scc = SharedCacheClient.createSharedCacheClient();
scc.init(conf);
scc.start();
return scc;
}
/**
* Upload and configure files, libjars, jobjars, and archives pertaining to
* the passed job.
* <p>
* This client will use the shared cache for libjars, files, archives and
* jobjars if it is enabled. When shared cache is enabled, it will try to use
* the shared cache and fall back to the default behavior when the scm isn't
* available.
* <p>
* 1. For the resources that have been successfully shared, we will continue
* to use them in a shared fashion.
* <p>
* 2. For the resources that weren't in the cache and need to be uploaded by
* NM, we won't ask NM to upload them.
*
* @param job the job containing the files to be uploaded
* @param submitJobDir the submission directory of the job
* @throws IOException
*/
public void uploadResources(Job job, Path submitJobDir) throws IOException {
try {
initSharedCache(job.getJobID(), job.getConfiguration());
uploadResourcesInternal(job, submitJobDir);
} finally {
stopSharedCache();
}
}
private void uploadResourcesInternal(Job job, Path submitJobDir)
throws IOException {
Configuration conf = job.getConfiguration();
short replication =
(short) conf.getInt(Job.SUBMIT_REPLICATION,
Job.DEFAULT_SUBMIT_REPLICATION);
if (!(conf.getBoolean(Job.USED_GENERIC_PARSER, false))) {
LOG.warn("Hadoop command-line option parsing not performed. "
+ "Implement the Tool interface and execute your application "
+ "with ToolRunner to remedy this.");
}
//
// Figure out what fs the JobTracker is using. Copy the
// job to it, under a temporary name. This allows DFS to work,
// and under the local fs also provides UNIX-like object loading
// semantics. (that is, if the job file is deleted right after
// submission, we can still run the submission to completion)
//
// Create a number of filenames in the JobTracker's fs namespace
LOG.debug("default FileSystem: " + jtFs.getUri());
if (jtFs.exists(submitJobDir)) {
throw new IOException("Not submitting job. Job directory " + submitJobDir
+ " already exists!! This is unexpected.Please check what's there in"
+ " that directory");
}
// Create the submission directory for the MapReduce job.
submitJobDir = jtFs.makeQualified(submitJobDir);
submitJobDir = new Path(submitJobDir.toUri().getPath());
FsPermission mapredSysPerms =
new FsPermission(JobSubmissionFiles.JOB_DIR_PERMISSION);
mkdirs(jtFs, submitJobDir, mapredSysPerms);
if (!conf.getBoolean(MRJobConfig.MR_AM_STAGING_DIR_ERASURECODING_ENABLED,
MRJobConfig.DEFAULT_MR_AM_STAGING_ERASURECODING_ENABLED)) {
disableErasureCodingForPath(submitJobDir);
}
// Get the resources that have been added via command line arguments in the
// GenericOptionsParser (i.e. files, libjars, archives).
Collection<String> files = conf.getStringCollection("tmpfiles");
Collection<String> libjars = conf.getStringCollection("tmpjars");
Collection<String> archives = conf.getStringCollection("tmparchives");
String jobJar = job.getJar();
// Merge resources that have been programmatically specified for the shared
// cache via the Job API.
files.addAll(conf.getStringCollection(MRJobConfig.FILES_FOR_SHARED_CACHE));
libjars.addAll(conf.getStringCollection(
MRJobConfig.FILES_FOR_CLASSPATH_AND_SHARED_CACHE));
archives.addAll(conf
.getStringCollection(MRJobConfig.ARCHIVES_FOR_SHARED_CACHE));
Map<URI, FileStatus> statCache = new HashMap<URI, FileStatus>();
checkLocalizationLimits(conf, files, libjars, archives, jobJar, statCache);
Map<String, Boolean> fileSCUploadPolicies =
new LinkedHashMap<String, Boolean>();
Map<String, Boolean> archiveSCUploadPolicies =
new LinkedHashMap<String, Boolean>();
uploadFiles(job, files, submitJobDir, mapredSysPerms, replication,
fileSCUploadPolicies, statCache);
uploadLibJars(job, libjars, submitJobDir, mapredSysPerms, replication,
fileSCUploadPolicies, statCache);
uploadArchives(job, archives, submitJobDir, mapredSysPerms, replication,
archiveSCUploadPolicies, statCache);
uploadJobJar(job, jobJar, submitJobDir, replication, statCache);
addLog4jToDistributedCache(job, submitJobDir);
// Note, we do not consider resources in the distributed cache for the
// shared cache at this time. Only resources specified via the
// GenericOptionsParser or the jobjar.
Job.setFileSharedCacheUploadPolicies(conf, fileSCUploadPolicies);
Job.setArchiveSharedCacheUploadPolicies(conf, archiveSCUploadPolicies);
// set the timestamps of the archives and files
// set the public/private visibility of the archives and files
ClientDistributedCacheManager.determineTimestampsAndCacheVisibilities(conf,
statCache);
// get DelegationToken for cached file
ClientDistributedCacheManager.getDelegationTokens(conf,
job.getCredentials());
}
@VisibleForTesting
void uploadFiles(Job job, Collection<String> files,
Path submitJobDir, FsPermission mapredSysPerms, short submitReplication,
Map<String, Boolean> fileSCUploadPolicies, Map<URI, FileStatus> statCache)
throws IOException {
Configuration conf = job.getConfiguration();
Path filesDir = JobSubmissionFiles.getJobDistCacheFiles(submitJobDir);
if (!files.isEmpty()) {
mkdirs(jtFs, filesDir, mapredSysPerms);
for (String tmpFile : files) {
URI tmpURI = null;
try {
tmpURI = new URI(tmpFile);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Error parsing files argument."
+ " Argument must be a valid URI: " + tmpFile, e);
}
Path tmp = new Path(tmpURI);
URI newURI = null;
boolean uploadToSharedCache = false;
if (scConfig.isSharedCacheFilesEnabled()) {
newURI = useSharedCache(tmpURI, tmp.getName(), statCache, conf, true);
if (newURI == null) {
uploadToSharedCache = true;
}
}
if (newURI == null) {
Path newPath =
copyRemoteFiles(filesDir, tmp, conf, submitReplication);
try {
newURI = getPathURI(newPath, tmpURI.getFragment());
} catch (URISyntaxException ue) {
// should not throw a uri exception
throw new IOException(
"Failed to create a URI (URISyntaxException) for the"
+ " remote path " + newPath
+ ". This was based on the files parameter: " + tmpFile,
ue);
}
}
job.addCacheFile(newURI);
if (scConfig.isSharedCacheFilesEnabled()) {
fileSCUploadPolicies.put(newURI.toString(), uploadToSharedCache);
}
}
}
}
// Suppress warning for use of DistributedCache (it is everywhere).
@SuppressWarnings("deprecation")
@VisibleForTesting
void uploadLibJars(Job job, Collection<String> libjars, Path submitJobDir,
FsPermission mapredSysPerms, short submitReplication,
Map<String, Boolean> fileSCUploadPolicies, Map<URI, FileStatus> statCache)
throws IOException {
Configuration conf = job.getConfiguration();
Path libjarsDir = JobSubmissionFiles.getJobDistCacheLibjars(submitJobDir);
if (!libjars.isEmpty()) {
mkdirs(jtFs, libjarsDir, mapredSysPerms);
Collection<URI> libjarURIs = new LinkedList<>();
boolean foundFragment = false;
for (String tmpjars : libjars) {
URI tmpURI = null;
try {
tmpURI = new URI(tmpjars);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Error parsing libjars argument."
+ " Argument must be a valid URI: " + tmpjars, e);
}
Path tmp = new Path(tmpURI);
URI newURI = null;
boolean uploadToSharedCache = false;
boolean fromSharedCache = false;
if (scConfig.isSharedCacheLibjarsEnabled()) {
newURI = useSharedCache(tmpURI, tmp.getName(), statCache, conf, true);
if (newURI == null) {
uploadToSharedCache = true;
} else {
fromSharedCache = true;
}
}
if (newURI == null) {
Path newPath =
copyRemoteFiles(libjarsDir, tmp, conf, submitReplication);
try {
newURI = getPathURI(newPath, tmpURI.getFragment());
} catch (URISyntaxException ue) {
// should not throw a uri exception
throw new IOException(
"Failed to create a URI (URISyntaxException) for the"
+ " remote path " + newPath
+ ". This was based on the libjar parameter: " + tmpjars,
ue);
}
}
if (!foundFragment) {
// We do not count shared cache paths containing fragments as a
// "foundFragment." This is because these resources are not in the
// staging directory and will be added to the distributed cache
// separately.
foundFragment = (newURI.getFragment() != null) && !fromSharedCache;
}
Job.addFileToClassPath(new Path(newURI.getPath()), conf, jtFs, false);
if (fromSharedCache) {
// We simply add this URI to the distributed cache. It will not come
// from the staging directory (it is in the shared cache), so we
// must add it to the cache regardless of the wildcard feature.
Job.addCacheFile(newURI, conf);
} else {
libjarURIs.add(newURI);
}
if (scConfig.isSharedCacheLibjarsEnabled()) {
fileSCUploadPolicies.put(newURI.toString(), uploadToSharedCache);
}
}
if (useWildcard && !foundFragment) {
// Add the whole directory to the cache using a wild card
Path libJarsDirWildcard =
jtFs.makeQualified(new Path(libjarsDir, DistributedCache.WILDCARD));
Job.addCacheFile(libJarsDirWildcard.toUri(), conf);
} else {
for (URI uri : libjarURIs) {
Job.addCacheFile(uri, conf);
}
}
}
}
@VisibleForTesting
void uploadArchives(Job job, Collection<String> archives,
Path submitJobDir, FsPermission mapredSysPerms, short submitReplication,
Map<String, Boolean> archiveSCUploadPolicies,
Map<URI, FileStatus> statCache) throws IOException {
Configuration conf = job.getConfiguration();
Path archivesDir = JobSubmissionFiles.getJobDistCacheArchives(submitJobDir);
if (!archives.isEmpty()) {
mkdirs(jtFs, archivesDir, mapredSysPerms);
for (String tmpArchives : archives) {
URI tmpURI;
try {
tmpURI = new URI(tmpArchives);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Error parsing archives argument."
+ " Argument must be a valid URI: " + tmpArchives, e);
}
Path tmp = new Path(tmpURI);
URI newURI = null;
boolean uploadToSharedCache = false;
if (scConfig.isSharedCacheArchivesEnabled()) {
newURI = useSharedCache(tmpURI, tmp.getName(), statCache, conf, true);
if (newURI == null) {
uploadToSharedCache = true;
}
}
if (newURI == null) {
Path newPath =
copyRemoteFiles(archivesDir, tmp, conf, submitReplication);
try {
newURI = getPathURI(newPath, tmpURI.getFragment());
} catch (URISyntaxException ue) {
// should not throw a uri exception
throw new IOException(
"Failed to create a URI (URISyntaxException) for the"
+ " remote path " + newPath
+ ". This was based on the archive parameter: "
+ tmpArchives,
ue);
}
}
job.addCacheArchive(newURI);
if (scConfig.isSharedCacheArchivesEnabled()) {
archiveSCUploadPolicies.put(newURI.toString(), uploadToSharedCache);
}
}
}
}
@VisibleForTesting
void uploadJobJar(Job job, String jobJar, Path submitJobDir,
short submitReplication, Map<URI, FileStatus> statCache)
throws IOException {
Configuration conf = job.getConfiguration();
if (jobJar != null) { // copy jar to JobTracker's fs
// use jar name if job is not named.
if ("".equals(job.getJobName())) {
job.setJobName(new Path(jobJar).getName());
}
Path jobJarPath = new Path(jobJar);
URI jobJarURI = jobJarPath.toUri();
Path newJarPath = null;
boolean uploadToSharedCache = false;
if (jobJarURI.getScheme() == null ||
jobJarURI.getScheme().equals("file")) {
// job jar is on the local file system
if (scConfig.isSharedCacheJobjarEnabled()) {
// We must have a qualified path for the shared cache client. We can
// assume this is for the local filesystem
jobJarPath = FileSystem.getLocal(conf).makeQualified(jobJarPath);
// Don't add a resource name here because the resource name (i.e.
// job.jar directory symlink) will always be hard coded to job.jar for
// the job.jar
URI newURI =
useSharedCache(jobJarPath.toUri(), null, statCache, conf, false);
if (newURI == null) {
uploadToSharedCache = true;
} else {
newJarPath = stringToPath(newURI.toString());
// The job jar is coming from the shared cache (i.e. a public
// place), so we want the job.jar to have a public visibility.
conf.setBoolean(MRJobConfig.JOBJAR_VISIBILITY, true);
}
}
if (newJarPath == null) {
newJarPath = JobSubmissionFiles.getJobJar(submitJobDir);
copyJar(jobJarPath, newJarPath, submitReplication);
}
} else {
// job jar is in a remote file system
if (scConfig.isSharedCacheJobjarEnabled()) {
// Don't add a resource name here because the resource name (i.e.
// job.jar directory symlink) will always be hard coded to job.jar for
// the job.jar
URI newURI = useSharedCache(jobJarURI, null, statCache, conf, false);
if (newURI == null) {
uploadToSharedCache = true;
newJarPath = jobJarPath;
} else {
newJarPath = stringToPath(newURI.toString());
// The job jar is coming from the shared cache (i.e. a public
// place), so we want the job.jar to have a public visibility.
conf.setBoolean(MRJobConfig.JOBJAR_VISIBILITY, true);
}
} else {
// we don't need to upload the jobjar to the staging directory because
// it is already in an accessible place
newJarPath = jobJarPath;
}
}
job.setJar(newJarPath.toString());
if (scConfig.isSharedCacheJobjarEnabled()) {
conf.setBoolean(MRJobConfig.JOBJAR_SHARED_CACHE_UPLOAD_POLICY,
uploadToSharedCache);
}
} else {
LOG.warn("No job jar file set. User classes may not be found. "
+ "See Job or Job#setJar(String).");
}
}
/**
* Verify that the resources this job is going to localize are within the
* localization limits. We count all resources towards these limits regardless
* of where they are coming from (i.e. local, distributed cache, or shared
* cache).
*/
@VisibleForTesting
void checkLocalizationLimits(Configuration conf, Collection<String> files,
Collection<String> libjars, Collection<String> archives, String jobJar,
Map<URI, FileStatus> statCache) throws IOException {
LimitChecker limitChecker = new LimitChecker(conf);
if (!limitChecker.hasLimits()) {
// there are no limits set, so we are done.
return;
}
// Get the files and archives that are already in the distributed cache
Collection<String> dcFiles =
conf.getStringCollection(MRJobConfig.CACHE_FILES);
Collection<String> dcArchives =
conf.getStringCollection(MRJobConfig.CACHE_ARCHIVES);
for (String uri : dcFiles) {
explorePath(conf, stringToPath(uri), limitChecker, statCache);
}
for (String uri : dcArchives) {
explorePath(conf, stringToPath(uri), limitChecker, statCache);
}
for (String uri : files) {
explorePath(conf, stringToPath(uri), limitChecker, statCache);
}
for (String uri : libjars) {
explorePath(conf, stringToPath(uri), limitChecker, statCache);
}
for (String uri : archives) {
explorePath(conf, stringToPath(uri), limitChecker, statCache);
}
if (jobJar != null) {
explorePath(conf, stringToPath(jobJar), limitChecker, statCache);
}
}
/**
* Convert a String to a Path and gracefully remove fragments/queries if they
* exist in the String.
*/
@VisibleForTesting
Path stringToPath(String s) {
try {
URI uri = new URI(s);
return new Path(uri.getScheme(), uri.getAuthority(), uri.getPath());
} catch (URISyntaxException e) {
throw new IllegalArgumentException(
"Error parsing argument." + " Argument must be a valid URI: " + s, e);
}
}
@VisibleForTesting
protected static final String MAX_RESOURCE_ERR_MSG =
"This job has exceeded the maximum number of submitted resources";
@VisibleForTesting
protected static final String MAX_TOTAL_RESOURCE_MB_ERR_MSG =
"This job has exceeded the maximum size of submitted resources";
@VisibleForTesting
protected static final String MAX_SINGLE_RESOURCE_MB_ERR_MSG =
"This job has exceeded the maximum size of a single submitted resource";
private static class LimitChecker {
LimitChecker(Configuration conf) {
this.maxNumOfResources =
conf.getInt(MRJobConfig.MAX_RESOURCES,
MRJobConfig.MAX_RESOURCES_DEFAULT);
this.maxSizeMB =
conf.getLong(MRJobConfig.MAX_RESOURCES_MB,
MRJobConfig.MAX_RESOURCES_MB_DEFAULT);
this.maxSizeOfResourceMB =
conf.getLong(MRJobConfig.MAX_SINGLE_RESOURCE_MB,
MRJobConfig.MAX_SINGLE_RESOURCE_MB_DEFAULT);
this.totalConfigSizeBytes = maxSizeMB * 1024 * 1024;
this.totalConfigSizeOfResourceBytes = maxSizeOfResourceMB * 1024 * 1024;
}
private long totalSizeBytes = 0;
private int totalNumberOfResources = 0;
private long currentMaxSizeOfFileBytes = 0;
private final long maxSizeMB;
private final int maxNumOfResources;
private final long maxSizeOfResourceMB;
private final long totalConfigSizeBytes;
private final long totalConfigSizeOfResourceBytes;
private boolean hasLimits() {
return maxNumOfResources > 0 || maxSizeMB > 0 || maxSizeOfResourceMB > 0;
}
private void addFile(Path p, long fileSizeBytes) throws IOException {
totalNumberOfResources++;
totalSizeBytes += fileSizeBytes;
if (fileSizeBytes > currentMaxSizeOfFileBytes) {
currentMaxSizeOfFileBytes = fileSizeBytes;
}
if (totalConfigSizeBytes > 0 && totalSizeBytes > totalConfigSizeBytes) {
throw new IOException(MAX_TOTAL_RESOURCE_MB_ERR_MSG + " (Max: "
+ maxSizeMB + "MB).");
}
if (maxNumOfResources > 0 &&
totalNumberOfResources > maxNumOfResources) {
throw new IOException(MAX_RESOURCE_ERR_MSG + " (Max: "
+ maxNumOfResources + ").");
}
if (totalConfigSizeOfResourceBytes > 0
&& currentMaxSizeOfFileBytes > totalConfigSizeOfResourceBytes) {
throw new IOException(MAX_SINGLE_RESOURCE_MB_ERR_MSG + " (Max: "
+ maxSizeOfResourceMB + "MB, Violating resource: " + p + ").");
}
}
}
/**
* Recursively explore the given path and enforce the limits for resource
* localization. This method assumes that there are no symlinks in the
* directory structure.
*/
private void explorePath(Configuration job, Path p,
LimitChecker limitChecker, Map<URI, FileStatus> statCache)
throws IOException {
Path pathWithScheme = p;
if (!pathWithScheme.toUri().isAbsolute()) {
// the path does not have a scheme, so we assume it is a path from the
// local filesystem
FileSystem localFs = FileSystem.getLocal(job);
pathWithScheme = localFs.makeQualified(p);
}
FileStatus status = getFileStatus(statCache, job, pathWithScheme);
if (status.isDirectory()) {
FileStatus[] statusArray =
pathWithScheme.getFileSystem(job).listStatus(pathWithScheme);
for (FileStatus s : statusArray) {
explorePath(job, s.getPath(), limitChecker, statCache);
}
} else {
limitChecker.addFile(pathWithScheme, status.getLen());
}
}
@VisibleForTesting
FileStatus getFileStatus(Map<URI, FileStatus> statCache,
Configuration job, Path p) throws IOException {
URI u = p.toUri();
FileStatus status = statCache.get(u);
if (status == null) {
status = p.getFileSystem(job).getFileStatus(p);
statCache.put(u, status);
}
return status;
}
/**
* Create a new directory in the passed filesystem. This wrapper method exists
* so that it can be overridden/stubbed during testing.
*/
@VisibleForTesting
boolean mkdirs(FileSystem fs, Path dir, FsPermission permission)
throws IOException {
return FileSystem.mkdirs(fs, dir, permission);
}
// copies a file to the jobtracker filesystem and returns the path where it
// was copied to
@VisibleForTesting
Path copyRemoteFiles(Path parentDir, Path originalPath,
Configuration conf, short replication) throws IOException {
// check if we do not need to copy the files
// is jt using the same file system.
// just checking for uri strings... doing no dns lookups
// to see if the filesystems are the same. This is not optimal.
// but avoids name resolution.
FileSystem remoteFs = null;
remoteFs = originalPath.getFileSystem(conf);
if (FileUtil.compareFs(remoteFs, jtFs)) {
return originalPath;
}
boolean root = false;
if (ROOT_PATH.equals(originalPath.toUri().getPath())) {
// "/" needs special treatment
root = true;
} else {
// If originalPath ends in a "/", then remove it so
// that originalPath.getName() does not return an empty string
String uriString = originalPath.toUri().toString();
if (uriString.endsWith("/")) {
try {
URI strippedURI =
new URI(uriString.substring(0, uriString.length() - 1));
originalPath = new Path(strippedURI);
} catch (URISyntaxException e) {
throw new IllegalArgumentException("Error processing URI", e);
}
}
}
// this might have name collisions. copy will throw an exception
// parse the original path to create new path
Path newPath = root ?
parentDir : new Path(parentDir, originalPath.getName());
FileUtil.copy(remoteFs, originalPath, jtFs, newPath, false, conf);
jtFs.setReplication(newPath, replication);
jtFs.makeQualified(newPath);
return newPath;
}
/**
* Checksum a local resource file and call use for that resource with the scm.
*/
private URI useSharedCache(URI sourceFile, String resourceName,
Map<URI, FileStatus> statCache, Configuration conf, boolean honorFragment)
throws IOException {
if (scClient == null) {
return null;
}
Path filePath = new Path(sourceFile);
if (getFileStatus(statCache, conf, filePath).isDirectory()) {
LOG.warn("Shared cache does not support directories"
+ " (see YARN-6097)." + " Will not upload " + filePath
+ " to the shared cache.");
return null;
}
String rn = resourceName;
if (honorFragment) {
if (sourceFile.getFragment() != null) {
rn = sourceFile.getFragment();
}
}
// If for whatever reason, we can't even calculate checksum for
// a resource, something is really wrong with the file system;
// even non-SCM approach won't work. Let us just throw the exception.
String checksum = scClient.getFileChecksum(filePath);
URL url = null;
try {
url = scClient.use(this.appId, checksum);
} catch (YarnException e) {
LOG.warn("Error trying to contact the shared cache manager,"
+ " disabling the SCMClient for the rest of this job submission", e);
/*
* If we fail to contact the SCM, we do not use it for the rest of this
* JobResourceUploader's life. This prevents us from having to timeout
* each time we try to upload a file while the SCM is unavailable. Instead
* we timeout/error the first time and quickly revert to the default
* behavior without the shared cache. We do this by stopping the shared
* cache client and setting it to null.
*/
stopSharedCache();
}
if (url != null) {
// Because we deal with URI's in mapreduce, we need to convert the URL to
// a URI and add a fragment if necessary.
URI uri = null;
try {
String name = new Path(url.getFile()).getName();
if (rn != null && !name.equals(rn)) {
// A name was specified that is different then the URL in the shared
// cache. Therefore, we need to set the fragment portion of the URI to
// preserve the user's desired name. We assume that there is no
// existing fragment in the URL since the shared cache manager does
// not use fragments.
uri = new URI(url.getScheme(), url.getUserInfo(), url.getHost(),
url.getPort(), url.getFile(), null, rn);
} else {
uri = new URI(url.getScheme(), url.getUserInfo(), url.getHost(),
url.getPort(), url.getFile(), null, null);
}
return uri;
} catch (URISyntaxException e) {
LOG.warn("Error trying to convert URL received from shared cache to"
+ " a URI: " + url.toString());
return null;
}
} else {
return null;
}
}
@VisibleForTesting
void copyJar(Path originalJarPath, Path submitJarFile,
short replication) throws IOException {
jtFs.copyFromLocalFile(originalJarPath, submitJarFile);
// The operation of setReplication requires certain permissions
// so we need to make sure it has enough permissions
jtFs.setPermission(submitJarFile, new FsPermission(
JobSubmissionFiles.JOB_FILE_PERMISSION));
jtFs.setReplication(submitJarFile, replication);
}
private void addLog4jToDistributedCache(Job job, Path jobSubmitDir)
throws IOException {
Configuration conf = job.getConfiguration();
String log4jPropertyFile =
conf.get(MRJobConfig.MAPREDUCE_JOB_LOG4J_PROPERTIES_FILE, "");
if (!log4jPropertyFile.isEmpty()) {
short replication = (short) conf.getInt(Job.SUBMIT_REPLICATION, 10);
copyLog4jPropertyFile(job, jobSubmitDir, replication);
}
}
private URI getPathURI(Path destPath, String fragment)
throws URISyntaxException {
URI pathURI = destPath.toUri();
if (pathURI.getFragment() == null) {
if (fragment == null) {
// no fragment, just return existing pathURI from destPath
} else {
pathURI = new URI(pathURI.toString() + "#" + fragment);
}
}
return pathURI;
}
// copy user specified log4j.property file in local
// to HDFS with putting on distributed cache and adding its parent directory
// to classpath.
@SuppressWarnings("deprecation")
private void copyLog4jPropertyFile(Job job, Path submitJobDir,
short replication) throws IOException {
Configuration conf = job.getConfiguration();
String file =
validateFilePath(
conf.get(MRJobConfig.MAPREDUCE_JOB_LOG4J_PROPERTIES_FILE), conf);
LOG.debug("default FileSystem: " + jtFs.getUri());
FsPermission mapredSysPerms =
new FsPermission(JobSubmissionFiles.JOB_DIR_PERMISSION);
try {
jtFs.getFileStatus(submitJobDir);
} catch (FileNotFoundException e) {
throw new IOException("Cannot find job submission directory! "
+ "It should just be created, so something wrong here.", e);
}
Path fileDir = JobSubmissionFiles.getJobLog4jFile(submitJobDir);
// first copy local log4j.properties file to HDFS under submitJobDir
if (file != null) {
FileSystem.mkdirs(jtFs, fileDir, mapredSysPerms);
URI tmpURI = null;
try {
tmpURI = new URI(file);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
Path tmp = new Path(tmpURI);
Path newPath = copyRemoteFiles(fileDir, tmp, conf, replication);
Path path = new Path(newPath.toUri().getPath());
Job.addFileToClassPath(path, conf, path.getFileSystem(conf));
}
}
/**
* takes input as a path string for file and verifies if it exist. It defaults
* for file:/// if the files specified do not have a scheme. it returns the
* paths uri converted defaulting to file:///. So an input of /home/user/file1
* would return file:///home/user/file1
*
* @param file
* @param conf
* @return
*/
private String validateFilePath(String file, Configuration conf)
throws IOException {
if (file == null) {
return null;
}
if (file.isEmpty()) {
throw new IllegalArgumentException("File name can't be empty string");
}
String finalPath;
URI pathURI;
try {
pathURI = new URI(file);
} catch (URISyntaxException e) {
throw new IllegalArgumentException(e);
}
Path path = new Path(pathURI);
if (pathURI.getScheme() == null) {
FileSystem localFs = FileSystem.getLocal(conf);
// default to the local file system
// check if the file exists or not first
localFs.getFileStatus(path);
finalPath =
path.makeQualified(localFs.getUri(), localFs.getWorkingDirectory())
.toString();
} else {
// check if the file exists in this file system
// we need to recreate this filesystem object to copy
// these files to the file system ResourceManager is running
// on.
FileSystem fs = path.getFileSystem(conf);
fs.getFileStatus(path);
finalPath =
path.makeQualified(fs.getUri(), fs.getWorkingDirectory()).toString();
}
return finalPath;
}
private void disableErasureCodingForPath(Path path)
throws IOException {
try {
if (jtFs instanceof DistributedFileSystem) {
LOG.info("Disabling Erasure Coding for path: " + path);
DistributedFileSystem dfs = (DistributedFileSystem) jtFs;
dfs.setErasureCodingPolicy(path,
SystemErasureCodingPolicies.getReplicationPolicy().getName());
}
} catch (RemoteException e) {
if (!RpcNoSuchMethodException.class.getName().equals(e.getClassName())) {
throw e;
} else {
if (LOG.isDebugEnabled()) {
LOG.debug(
"Ignore disabling erasure coding for path {} because method "
+ "disableErasureCodingForPath doesn't exist, probably "
+ "talking to a lower version HDFS.", path.toString(), e);
}
}
}
}
}
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