/**
* 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.filecache;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.util.Random;
import java.util.concurrent.TimeUnit;
import javax.security.auth.login.LoginException;
import junit.framework.TestCase;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.DefaultTaskController;
import org.apache.hadoop.mapred.TaskController;
import org.apache.hadoop.mapred.TaskTracker;
import org.apache.hadoop.mapreduce.Cluster;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.MRConfig;
import org.apache.hadoop.mapreduce.MRJobConfig;
import org.apache.hadoop.mapreduce.filecache.DistributedCache;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.FileUtil;
import org.apache.hadoop.fs.LocalDirAllocator;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.RawLocalFileSystem;
import org.apache.hadoop.fs.permission.FsAction;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.mapreduce.filecache.TaskDistributedCacheManager;
import org.apache.hadoop.mapreduce.filecache.TrackerDistributedCacheManager;
import org.apache.hadoop.mapreduce.server.tasktracker.TTConfig;
import org.apache.hadoop.security.UserGroupInformation;
import org.apache.hadoop.util.ReflectionUtils;
import org.mortbay.log.Log;
public class TestTrackerDistributedCacheManager extends TestCase {
protected String TEST_ROOT_DIR =
new File(System.getProperty("test.build.data", "/tmp"),
TestTrackerDistributedCacheManager.class.getSimpleName())
.getAbsolutePath();
protected File ROOT_MAPRED_LOCAL_DIR;
protected int numLocalDirs = 6;
private static final int TEST_FILE_SIZE = 4 * 1024; // 4K
private static final int LOCAL_CACHE_LIMIT = 5 * 1024; //5K
private static final int LOCAL_CACHE_SUBDIR = 2;
protected Configuration conf;
protected Path firstCacheFile;
protected Path secondCacheFile;
private FileSystem fs;
protected LocalDirAllocator localDirAllocator =
new LocalDirAllocator(MRConfig.LOCAL_DIR);
protected TaskController taskController;
@Override
protected void setUp() throws IOException,InterruptedException {
// Prepare the tests' root dir
File TEST_ROOT = new File(TEST_ROOT_DIR);
if (!TEST_ROOT.exists()) {
TEST_ROOT.mkdirs();
}
// Prepare the tests' mapred-local-dir
ROOT_MAPRED_LOCAL_DIR = new File(TEST_ROOT_DIR, "mapred/local");
ROOT_MAPRED_LOCAL_DIR.mkdirs();
String []localDirs = new String[numLocalDirs];
for (int i = 0; i < numLocalDirs; i++) {
File localDir = new File(ROOT_MAPRED_LOCAL_DIR, "0_" + i);
localDirs[i] = localDir.getPath();
localDir.mkdir();
}
conf = new Configuration();
conf.setStrings(MRConfig.LOCAL_DIR, localDirs);
conf.set(FileSystem.FS_DEFAULT_NAME_KEY, "file:///");
fs = FileSystem.get(conf);
Class<? extends TaskController> taskControllerClass = conf.getClass(
TTConfig.TT_TASK_CONTROLLER, DefaultTaskController.class,
TaskController.class);
taskController = (TaskController) ReflectionUtils.newInstance(
taskControllerClass, conf);
// setup permissions for mapred local dir
taskController.setup();
// Create the temporary cache files to be used in the tests.
firstCacheFile = new Path(TEST_ROOT_DIR, "firstcachefile");
secondCacheFile = new Path(TEST_ROOT_DIR, "secondcachefile");
createPrivateTempFile(firstCacheFile);
createPrivateTempFile(secondCacheFile);
}
protected void refreshConf(Configuration conf) throws IOException {
taskController.setConf(conf);
taskController.setup();
}
/**
* Whether the test can run on the machine
*
* @return true if test can run on the machine, false otherwise
*/
protected boolean canRun() {
return true;
}
/**
* This is the typical flow for using the DistributedCache classes.
*
* @throws IOException
* @throws LoginException
*/
public void testManagerFlow() throws IOException, LoginException {
if (!canRun()) {
return;
}
// ****** Imitate JobClient code
// Configures a task/job with both a regular file and a "classpath" file.
Configuration subConf = new Configuration(conf);
String userName = getJobOwnerName();
subConf.set(MRJobConfig.USER_NAME, userName);
DistributedCache.addCacheFile(firstCacheFile.toUri(), subConf);
DistributedCache.addFileToClassPath(secondCacheFile, subConf);
TrackerDistributedCacheManager.determineTimestamps(subConf);
TrackerDistributedCacheManager.determineCacheVisibilities(subConf);
// ****** End of imitating JobClient code
Path jobFile = new Path(TEST_ROOT_DIR, "job.xml");
FileOutputStream os = new FileOutputStream(new File(jobFile.toString()));
subConf.writeXml(os);
os.close();
// ****** Imitate TaskRunner code.
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf, taskController);
TaskDistributedCacheManager handle =
manager.newTaskDistributedCacheManager(subConf);
assertNull(null, DistributedCache.getLocalCacheFiles(subConf));
File workDir = new File(new Path(TEST_ROOT_DIR, "workdir").toString());
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName),
TaskTracker.getPublicDistributedCacheDir());
// ****** End of imitating TaskRunner code
Path[] localCacheFiles = DistributedCache.getLocalCacheFiles(subConf);
assertNotNull(null, localCacheFiles);
assertEquals(2, localCacheFiles.length);
Path cachedFirstFile = localCacheFiles[0];
Path cachedSecondFile = localCacheFiles[1];
assertFileLengthEquals(firstCacheFile, cachedFirstFile);
assertFalse("Paths should be different.",
firstCacheFile.equals(cachedFirstFile));
assertEquals(1, handle.getClassPaths().size());
assertEquals(cachedSecondFile.toString(), handle.getClassPaths().get(0));
checkFilePermissions(localCacheFiles);
// Cleanup
handle.release();
manager.purgeCache();
assertFalse(pathToFile(cachedFirstFile).exists());
}
/**
* This DistributedCacheManager fails in localizing firstCacheFile.
*/
public class FakeTrackerDistributedCacheManager extends
TrackerDistributedCacheManager {
public FakeTrackerDistributedCacheManager(Configuration conf)
throws IOException {
super(conf, taskController);
}
@Override
Path localizeCache(Configuration conf, URI cache, long confFileStamp,
CacheStatus cacheStatus, FileStatus fileStatus, boolean isArchive,
boolean isPublic) throws IOException {
if (cache.equals(firstCacheFile.toUri())) {
throw new IOException("fake fail");
}
return super.localizeCache(conf, cache, confFileStamp, cacheStatus,
fileStatus, isArchive, isPublic);
}
}
public void testReferenceCount() throws IOException, LoginException,
URISyntaxException, InterruptedException {
if (!canRun()) {
return;
}
TrackerDistributedCacheManager manager =
new FakeTrackerDistributedCacheManager(conf);
Cluster cluster = new Cluster(conf);
String userName = getJobOwnerName();
File workDir = new File(new Path(TEST_ROOT_DIR, "workdir").toString());
// Configures a job with a regular file
Job job1 = Job.getInstance(cluster, conf);
job1.setUser(userName);
job1.addCacheFile(secondCacheFile.toUri());
Configuration conf1 = job1.getConfiguration();
TrackerDistributedCacheManager.determineTimestamps(conf1);
TrackerDistributedCacheManager.determineCacheVisibilities(conf1);
// Task localizing for first job
TaskDistributedCacheManager handle = manager
.newTaskDistributedCacheManager(conf1);
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName),
TaskTracker.getPublicDistributedCacheDir());
handle.release();
for (TaskDistributedCacheManager.CacheFile c : handle.getCacheFiles()) {
assertEquals(0, manager.getReferenceCount(c.uri, conf1, c.timestamp));
}
Path thirdCacheFile = new Path(TEST_ROOT_DIR, "thirdcachefile");
createPrivateTempFile(thirdCacheFile);
// Configures another job with three regular files.
Job job2 = Job.getInstance(cluster, conf);
job2.setUser(userName);
// add a file that would get failed to localize
job2.addCacheFile(firstCacheFile.toUri());
// add a file that is already localized by different job
job2.addCacheFile(secondCacheFile.toUri());
// add a file that is never localized
job2.addCacheFile(thirdCacheFile.toUri());
Configuration conf2 = job2.getConfiguration();
TrackerDistributedCacheManager.determineTimestamps(conf2);
TrackerDistributedCacheManager.determineCacheVisibilities(conf2);
// Task localizing for second job
// localization for the "firstCacheFile" will fail.
handle = manager.newTaskDistributedCacheManager(conf2);
Throwable th = null;
try {
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName),
TaskTracker.getPublicDistributedCacheDir());
} catch (IOException e) {
th = e;
Log.info("Exception during setup", e);
}
assertNotNull(th);
assertTrue(th.getMessage().contains("fake fail"));
handle.release();
th = null;
for (TaskDistributedCacheManager.CacheFile c : handle.getCacheFiles()) {
try {
assertEquals(0, manager.getReferenceCount(c.uri, conf2, c.timestamp));
} catch (IOException ie) {
th = ie;
Log.info("Exception getting reference count for " + c.uri, ie);
}
}
assertNotNull(th);
assertTrue(th.getMessage().contains(thirdCacheFile.getName()));
fs.delete(thirdCacheFile, false);
}
/**
* Tests that localization of distributed cache file happens in the desired
* directory
* @throws IOException
* @throws LoginException
*/
public void testPublicPrivateCache()
throws IOException, LoginException, InterruptedException {
if (!canRun()) {
return;
}
checkLocalizedPath("true");
checkLocalizedPath("false");
}
private void checkLocalizedPath(String visibility)
throws IOException, LoginException, InterruptedException {
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf, taskController);
Cluster cluster = new Cluster(conf);
String userName = getJobOwnerName();
File workDir = new File(TEST_ROOT_DIR, "workdir");
Path cacheFile = new Path(TEST_ROOT_DIR, "fourthcachefile");
if ("true".equals(visibility)) {
createPublicTempFile(cacheFile);
} else {
createPrivateTempFile(cacheFile);
}
Job job1 = Job.getInstance(cluster, conf);
job1.setUser(userName);
job1.addCacheFile(cacheFile.toUri());
Configuration conf1 = job1.getConfiguration();
TrackerDistributedCacheManager.determineTimestamps(conf1);
TrackerDistributedCacheManager.determineCacheVisibilities(conf1);
// Task localizing for job
TaskDistributedCacheManager handle = manager
.newTaskDistributedCacheManager(conf1);
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName),
TaskTracker.getPublicDistributedCacheDir());
TaskDistributedCacheManager.CacheFile c = handle.getCacheFiles().get(0);
String distCacheDir;
if ("true".equals(visibility)) {
distCacheDir = TaskTracker.getPublicDistributedCacheDir();
} else {
distCacheDir = TaskTracker.getPrivateDistributedCacheDir(userName);
}
Path localizedPath =
manager.getLocalCache(cacheFile.toUri(), conf1, distCacheDir,
fs.getFileStatus(cacheFile), false,
c.timestamp, new Path(TEST_ROOT_DIR), false,
Boolean.parseBoolean(visibility));
assertTrue("Cache file didn't get localized in the expected directory. " +
"Expected localization to happen within " +
ROOT_MAPRED_LOCAL_DIR + "/" + distCacheDir +
", but was localized at " +
localizedPath, localizedPath.toString().contains(distCacheDir));
if ("true".equals(visibility)) {
checkPublicFilePermissions(new Path[]{localizedPath});
} else {
checkFilePermissions(new Path[]{localizedPath});
}
}
/**
* Check proper permissions on the cache files
*
* @param localCacheFiles
* @throws IOException
*/
protected void checkFilePermissions(Path[] localCacheFiles)
throws IOException {
// All the files should have executable permissions on them.
for (Path p : localCacheFiles) {
assertTrue("Cache file is not executable!", new File(p
.toUri().getPath()).canExecute());
}
}
/**
* Check permissions on the public cache files
*
* @param localCacheFiles
* @throws IOException
*/
private void checkPublicFilePermissions(Path[] localCacheFiles)
throws IOException {
checkPublicFilePermissions(fs, localCacheFiles);
}
/**
* Verify the permissions for a file localized as a public distributed
* cache file
* @param fs The Local FileSystem used to get the permissions
* @param localCacheFiles The list of files whose permissions should be
* verified.
* @throws IOException
*/
public static void checkPublicFilePermissions(FileSystem fs,
Path[] localCacheFiles) throws IOException {
// All the files should have read and executable permissions for others
for (Path p : localCacheFiles) {
FsPermission perm = fs.getFileStatus(p).getPermission();
assertTrue("cache file is not readable / executable by owner: perm="
+ perm.getUserAction(), perm.getUserAction()
.implies(FsAction.READ_EXECUTE));
assertTrue("cache file is not readable / executable by group: perm="
+ perm.getGroupAction(), perm.getGroupAction()
.implies(FsAction.READ_EXECUTE));
assertTrue("cache file is not readable / executable by others: perm="
+ perm.getOtherAction(), perm.getOtherAction()
.implies(FsAction.READ_EXECUTE));
}
}
/**
* Verify the ownership for files localized as a public distributed cache
* file.
* @param fs The Local FileSystem used to get the ownership
* @param localCacheFiles THe list of files whose ownership should be
* verified
* @param owner The owner of the files
* @param group The group owner of the files.
* @throws IOException
*/
public static void checkPublicFileOwnership(FileSystem fs,
Path[] localCacheFiles, String owner, String group)
throws IOException {
for (Path p: localCacheFiles) {
assertEquals(owner, fs.getFileStatus(p).getOwner());
assertEquals(group, fs.getFileStatus(p).getGroup());
}
}
protected String getJobOwnerName() throws IOException {
return UserGroupInformation.getLoginUser().getUserName();
}
/** test delete cache */
public void testDeleteCache() throws Exception {
if (!canRun()) {
return;
}
// This test needs MRConfig.LOCAL_DIR to be single directory
// instead of four, because it assumes that both
// firstcachefile and secondcachefile will be localized on same directory
// so that second localization triggers deleteCache.
// If MRConfig.LOCAL_DIR is four directories, second localization might not
// trigger deleteCache, if it is localized in different directory.
Configuration conf2 = new Configuration(conf);
conf2.set(MRConfig.LOCAL_DIR, ROOT_MAPRED_LOCAL_DIR.toString());
conf2.setLong(TTConfig.TT_LOCAL_CACHE_SIZE, LOCAL_CACHE_LIMIT);
conf2.setLong(TTConfig.TT_LOCAL_CACHE_SUBDIRS_LIMIT, LOCAL_CACHE_SUBDIR);
conf2.setLong(TTConfig.TT_DISTRIBUTED_CACHE_CHECK_PERIOD, 200); // 200 ms
refreshConf(conf2);
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf2, taskController);
manager.startCleanupThread();
FileSystem localfs = FileSystem.getLocal(conf2);
long now = System.currentTimeMillis();
String userName = getJobOwnerName();
conf2.set(MRJobConfig.USER_NAME, userName);
// We first test the size limit
Path localCache = manager.getLocalCache(firstCacheFile.toUri(), conf2,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(firstCacheFile), false,
now, new Path(TEST_ROOT_DIR), false, false);
manager.releaseCache(firstCacheFile.toUri(), conf2, now);
//in above code,localized a file of size 4K and then release the cache
// which will cause the cache be deleted when the limit goes out.
// The below code localize another cache which's designed to
//sweep away the first cache.
manager.getLocalCache(secondCacheFile.toUri(), conf2,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(secondCacheFile), false,
System.currentTimeMillis(), new Path(TEST_ROOT_DIR), false, false);
checkCacheDeletion(localfs, localCache, "DistributedCache failed " +
"deleting old cache when the cache store is full.");
// Now we test the number of sub directories limit
// Create the temporary cache files to be used in the tests.
Path thirdCacheFile = new Path(TEST_ROOT_DIR, "thirdcachefile");
Path fourthCacheFile = new Path(TEST_ROOT_DIR, "fourthcachefile");
// Adding two more small files, so it triggers the number of sub directory
// limit but does not trigger the file size limit.
createTempFile(thirdCacheFile, 1);
createTempFile(fourthCacheFile, 1);
Path thirdLocalCache = manager.getLocalCache(thirdCacheFile.toUri(), conf2,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(thirdCacheFile), false,
now, new Path(TEST_ROOT_DIR), false, false);
// Release the third cache so that it can be deleted while sweeping
manager.releaseCache(thirdCacheFile.toUri(), conf2, now);
// Getting the fourth cache will make the number of sub directories becomes
// 3 which is greater than 2. So the released cache will be deleted.
manager.getLocalCache(fourthCacheFile.toUri(), conf2,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(fourthCacheFile), false,
System.currentTimeMillis(), new Path(TEST_ROOT_DIR), false, false);
checkCacheDeletion(localfs, thirdLocalCache,
"DistributedCache failed deleting old" +
" cache when the cache exceeds the number of sub directories limit.");
// Clean up the files created in this test
new File(thirdCacheFile.toString()).delete();
new File(fourthCacheFile.toString()).delete();
manager.stopCleanupThread();
}
/**
* Periodically checks if a file is there, return if the file is no longer
* there. Fails the test if a files is there for 30 seconds.
*/
private void checkCacheDeletion(FileSystem fs, Path cache, String msg)
throws Exception {
// Check every 100ms to see if the cache is deleted
boolean cacheExists = true;
for (int i = 0; i < 300; i++) {
if (!fs.exists(cache)) {
cacheExists = false;
break;
}
TimeUnit.MILLISECONDS.sleep(100L);
}
// If the cache is still there after 5 minutes, test fails.
assertFalse(msg, cacheExists);
}
public void testFileSystemOtherThanDefault() throws Exception {
if (!canRun()) {
return;
}
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf, taskController);
conf.set("fs.fakefile.impl", conf.get("fs.file.impl"));
String userName = getJobOwnerName();
conf.set(MRJobConfig.USER_NAME, userName);
Path fileToCache = new Path("fakefile:///"
+ firstCacheFile.toUri().getPath());
Path result = manager.getLocalCache(fileToCache.toUri(), conf,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(firstCacheFile), false,
System.currentTimeMillis(),
new Path(TEST_ROOT_DIR), false, false);
assertNotNull("DistributedCache cached file on non-default filesystem.",
result);
}
static void createTempFile(Path p) throws IOException {
createTempFile(p, TEST_FILE_SIZE);
}
static void createTempFile(Path p, int size) throws IOException {
File f = new File(p.toString());
FileOutputStream os = new FileOutputStream(f);
byte[] toWrite = new byte[size];
new Random().nextBytes(toWrite);
os.write(toWrite);
os.close();
FileSystem.LOG.info("created: " + p + ", size=" + size);
}
static void createPublicTempFile(Path p)
throws IOException, InterruptedException {
createTempFile(p);
FileUtil.chmod(p.toString(), "0777",true);
}
static void createPrivateTempFile(Path p)
throws IOException, InterruptedException {
createTempFile(p);
FileUtil.chmod(p.toString(), "0770",true);
}
@Override
protected void tearDown() throws IOException {
new File(firstCacheFile.toString()).delete();
new File(secondCacheFile.toString()).delete();
FileUtil.fullyDelete(new File(TEST_ROOT_DIR));
}
protected void assertFileLengthEquals(Path a, Path b)
throws FileNotFoundException {
assertEquals("File sizes mismatch.",
pathToFile(a).length(), pathToFile(b).length());
}
protected File pathToFile(Path p) {
return new File(p.toString());
}
public static class FakeFileSystem extends RawLocalFileSystem {
private long increment = 0;
public FakeFileSystem() {
super();
}
public FileStatus getFileStatus(Path p) throws IOException {
File f = pathToFile(p);
return new FileStatus(f.length(), f.isDirectory(), 1, 128,
f.lastModified() + increment, makeQualified(new Path(f.getPath())));
}
void advanceClock(long millis) {
increment += millis;
}
}
public void testFreshness() throws Exception {
if (!canRun()) {
return;
}
Configuration myConf = new Configuration(conf);
myConf.set(FileSystem.FS_DEFAULT_NAME_KEY, "refresh:///");
myConf.setClass("fs.refresh.impl", FakeFileSystem.class, FileSystem.class);
String userName = getJobOwnerName();
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(myConf, taskController);
// ****** Imitate JobClient code
// Configures a task/job with both a regular file and a "classpath" file.
Configuration subConf = new Configuration(myConf);
subConf.set(MRJobConfig.USER_NAME, userName);
DistributedCache.addCacheFile(firstCacheFile.toUri(), subConf);
TrackerDistributedCacheManager.determineTimestamps(subConf);
TrackerDistributedCacheManager.determineCacheVisibilities(subConf);
// ****** End of imitating JobClient code
// ****** Imitate TaskRunner code.
TaskDistributedCacheManager handle =
manager.newTaskDistributedCacheManager(subConf);
assertNull(null, DistributedCache.getLocalCacheFiles(subConf));
File workDir = new File(new Path(TEST_ROOT_DIR, "workdir").toString());
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName),
TaskTracker.getPublicDistributedCacheDir());
// ****** End of imitating TaskRunner code
Path[] localCacheFiles = DistributedCache.getLocalCacheFiles(subConf);
assertNotNull(null, localCacheFiles);
assertEquals(1, localCacheFiles.length);
Path cachedFirstFile = localCacheFiles[0];
assertFileLengthEquals(firstCacheFile, cachedFirstFile);
assertFalse("Paths should be different.",
firstCacheFile.equals(cachedFirstFile));
// release
handle.release();
// change the file timestamp
FileSystem fs = FileSystem.get(myConf);
((FakeFileSystem)fs).advanceClock(1);
// running a task of the same job
Throwable th = null;
try {
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName), TaskTracker.getPublicDistributedCacheDir());
} catch (IOException ie) {
th = ie;
}
assertNotNull("Throwable is null", th);
assertTrue("Exception message does not match",
th.getMessage().contains("has changed on HDFS since job started"));
// release
handle.release();
// submit another job
Configuration subConf2 = new Configuration(myConf);
subConf2.set(MRJobConfig.USER_NAME, userName);
DistributedCache.addCacheFile(firstCacheFile.toUri(), subConf2);
TrackerDistributedCacheManager.determineTimestamps(subConf2);
TrackerDistributedCacheManager.determineCacheVisibilities(subConf2);
handle =
manager.newTaskDistributedCacheManager(subConf2);
handle.setup(localDirAllocator, workDir, TaskTracker
.getPrivateDistributedCacheDir(userName), TaskTracker.getPublicDistributedCacheDir());
Path[] localCacheFiles2 = DistributedCache.getLocalCacheFiles(subConf2);
assertNotNull(null, localCacheFiles2);
assertEquals(1, localCacheFiles2.length);
Path cachedFirstFile2 = localCacheFiles2[0];
assertFileLengthEquals(firstCacheFile, cachedFirstFile2);
assertFalse("Paths should be different.",
firstCacheFile.equals(cachedFirstFile2));
// assert that two localizations point to different paths
assertFalse("two jobs with different timestamps did not localize" +
" in different paths", cachedFirstFile.equals(cachedFirstFile2));
// release
handle.release();
}
/**
* Localize a file. After localization is complete, create a file, "myFile",
* under the directory where the file is localized and ensure that it has
* permissions different from what is set by default. Then, localize another
* file. Verify that "myFile" has the right permissions.
* @throws Exception
*/
public void testCustomPermissions() throws Exception {
if (!canRun()) {
return;
}
String userName = getJobOwnerName();
conf.set(MRJobConfig.USER_NAME, userName);
TrackerDistributedCacheManager manager =
new TrackerDistributedCacheManager(conf, taskController);
FileSystem localfs = FileSystem.getLocal(conf);
long now = System.currentTimeMillis();
Path[] localCache = new Path[2];
localCache[0] = manager.getLocalCache(firstCacheFile.toUri(), conf,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(firstCacheFile), false,
now, new Path(TEST_ROOT_DIR), false, false);
FsPermission myPermission = new FsPermission((short)0600);
Path myFile = new Path(localCache[0].getParent(), "myfile.txt");
if (FileSystem.create(localfs, myFile, myPermission) == null) {
throw new IOException("Could not create " + myFile);
}
try {
localCache[1] = manager.getLocalCache(secondCacheFile.toUri(), conf,
TaskTracker.getPrivateDistributedCacheDir(userName),
fs.getFileStatus(secondCacheFile), false,
System.currentTimeMillis(), new Path(TEST_ROOT_DIR), false, false);
FileStatus stat = localfs.getFileStatus(myFile);
assertTrue(stat.getPermission().equals(myPermission));
// validate permissions of localized files.
checkFilePermissions(localCache);
} finally {
localfs.delete(myFile, false);
}
}
}