/**
* 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.DataOutputStream;
import java.net.URI;
import java.util.Collection;
import org.apache.commons.logging.LogFactory;
import org.apache.commons.logging.Log;
import org.apache.hadoop.mapreduce.test.system.JTProtocol;
import org.apache.hadoop.mapreduce.test.system.TTClient;
import org.apache.hadoop.mapreduce.test.system.JobInfo;
import org.apache.hadoop.mapreduce.test.system.TaskInfo;
import org.apache.hadoop.mapreduce.test.system.MRCluster;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.mapred.UtilsForTests;
import org.apache.hadoop.mapreduce.test.system.FinishTaskControlAction;
import org.apache.hadoop.filecache.DistributedCache;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.permission.FsPermission;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.SleepJob;
import org.junit.Assert;
import org.junit.BeforeClass;
import org.junit.AfterClass;
import org.junit.Test;
/**
* Verify the Distributed Cache functionality.
* This test scenario is for a distributed cache file behaviour
* when the file is private. Once a job uses a distributed
* cache file with private permissions that file is stored in the
* mapred.local.dir, under the directory which has the same name
* as job submitter's username. The directory has 700 permission
* and the file under it, should have 777 permissions.
*/
public class TestDistributedCachePrivateFile {
private static MRCluster cluster = null;
private static FileSystem dfs = null;
private static JobClient client = null;
private static FsPermission permission = new FsPermission((short)00770);
private static String uriPath = "hdfs:///tmp/test.txt";
private static final Path URIPATH = new Path(uriPath);
private String distributedFileName = "test.txt";
static final Log LOG = LogFactory.
getLog(TestDistributedCachePrivateFile.class);
public TestDistributedCachePrivateFile() throws Exception {
}
@BeforeClass
public static void setUp() throws Exception {
cluster = MRCluster.createCluster(new Configuration());
cluster.setUp();
client = cluster.getJTClient().getClient();
dfs = client.getFs();
//Deleting the file if it already exists
dfs.delete(URIPATH, true);
Collection<TTClient> tts = cluster.getTTClients();
//Stopping all TTs
for (TTClient tt : tts) {
tt.kill();
}
//Starting all TTs
for (TTClient tt : tts) {
tt.start();
}
String input = "This will be the content of\n" + "distributed cache\n";
//Creating the path with the file
DataOutputStream file =
UtilsForTests.createTmpFileDFS(dfs, URIPATH, permission, input);
}
@AfterClass
public static void tearDown() throws Exception {
cluster.tearDown();
dfs.delete(URIPATH, true);
Collection<TTClient> tts = cluster.getTTClients();
//Stopping all TTs
for (TTClient tt : tts) {
tt.kill();
}
//Starting all TTs
for (TTClient tt : tts) {
tt.start();
}
}
@Test
/**
* This tests Distributed Cache for private file
* @param none
* @return void
*/
public void testDistributedCache() throws Exception {
Configuration conf = new Configuration(cluster.getConf());
JTProtocol wovenClient = cluster.getJTClient().getProxy();
//This counter will check for count of a loop,
//which might become infinite.
int count = 0;
SleepJob job = new SleepJob();
job.setConf(conf);
Job slpJob = job.createJob(5, 1, 1000, 1000, 100, 100);
DistributedCache.createSymlink(conf);
URI uri = URI.create(uriPath);
DistributedCache.addCacheFile(uri, conf);
JobConf jconf = new JobConf(conf);
//Controls the job till all verification is done
FinishTaskControlAction.configureControlActionForJob(conf);
//Submitting the job
slpJob.submit();
RunningJob rJob =
cluster.getJTClient().getClient().getJob(org.apache.hadoop.mapred.JobID.downgrade(slpJob.getJobID()));
JobStatus[] jobStatus = client.getAllJobs();
String userName = jobStatus[0].getUsername();
TTClient tClient = null;
JobInfo jInfo = wovenClient.getJobInfo(rJob.getID());
LOG.info("jInfo is :" + jInfo);
//Assert if jobInfo is null
Assert.assertNotNull("jobInfo is null", jInfo);
//Wait for the job to start running.
count = 0;
while (jInfo.getStatus().getRunState() != JobStatus.RUNNING) {
UtilsForTests.waitFor(10000);
count++;
jInfo = wovenClient.getJobInfo(rJob.getID());
//If the count goes beyond a point, then Assert; This is to avoid
//infinite loop under unforeseen circumstances.
if (count > 10) {
Assert.fail("job has not reached running state for more than" +
"100 seconds. Failing at this point");
}
}
LOG.info("job id is :" + rJob.getID().toString());
TaskInfo[] taskInfos = cluster.getJTClient().getProxy()
.getTaskInfo(rJob.getID());
boolean distCacheFileIsFound;
for (TaskInfo taskInfo : taskInfos) {
distCacheFileIsFound = false;
String[] taskTrackers = taskInfo.getTaskTrackers();
for(String taskTracker : taskTrackers) {
//Getting the exact FQDN of the tasktracker from
//the tasktracker string.
taskTracker = UtilsForTests.getFQDNofTT(taskTracker);
tClient = cluster.getTTClient(taskTracker);
String[] localDirs = tClient.getMapredLocalDirs();
int distributedFileCount = 0;
String localDirOnly = null;
boolean FileNotPresentForThisDirectoryPath = false;
//Go to every single path
for (String localDir : localDirs) {
FileNotPresentForThisDirectoryPath = false;
localDirOnly = localDir;
//Public Distributed cache will always be stored under
//mapred.local.dir/tasktracker/archive
localDirOnly = localDir + Path.SEPARATOR + TaskTracker.SUBDIR +
Path.SEPARATOR + userName;
//Private Distributed cache will always be stored under
//mapre.local.dir/taskTracker/<username>/distcache
//Checking for username directory to check if it has the
//proper permissions
localDir = localDir + Path.SEPARATOR +
TaskTracker.getPrivateDistributedCacheDir(userName);
FileStatus fileStatusMapredLocalDirUserName = null;
try {
fileStatusMapredLocalDirUserName = tClient.
getFileStatus(localDirOnly, true);
} catch (Exception e) {
LOG.info("LocalDirOnly :" + localDirOnly + " not found");
FileNotPresentForThisDirectoryPath = true;
}
//File will only be stored under one of the mapred.lcoal.dir
//If other paths were hit, just continue
if (FileNotPresentForThisDirectoryPath)
continue;
Path pathMapredLocalDirUserName =
fileStatusMapredLocalDirUserName.getPath();
FsPermission fsPermMapredLocalDirUserName =
fileStatusMapredLocalDirUserName.getPermission();
Assert.assertTrue("Directory Permission is not 700",
fsPermMapredLocalDirUserName.equals(new FsPermission("700")));
//Get file status of all the directories
//and files under that path.
FileStatus[] fileStatuses = tClient.listStatus(localDir,
true, true);
for (FileStatus fileStatus : fileStatuses) {
Path path = fileStatus.getPath();
LOG.info("path is :" + path.toString());
//Checking if the received path ends with
//the distributed filename
distCacheFileIsFound = (path.toString()).
endsWith(distributedFileName);
//If file is found, check for its permission.
//Since the file is found break out of loop
if (distCacheFileIsFound){
LOG.info("PATH found is :" + path.toString());
distributedFileCount++;
String filename = path.getName();
FsPermission fsPerm = fileStatus.getPermission();
Assert.assertTrue("File Permission is not 777",
fsPerm.equals(new FsPermission("777")));
}
}
}
LOG.info("Distributed File count is :" + distributedFileCount);
if (distributedFileCount > 1) {
Assert.fail("The distributed cache file is more than one");
} else if (distributedFileCount < 1)
Assert.fail("The distributed cache file is less than one");
if (!distCacheFileIsFound) {
Assert.assertEquals("The distributed cache file does not exist",
distCacheFileIsFound, false);
}
}
//Allow the job to continue through MR control job.
for (TaskInfo taskInfoRemaining : taskInfos) {
FinishTaskControlAction action = new FinishTaskControlAction(TaskID
.downgrade(taskInfoRemaining.getTaskID()));
Collection<TTClient> tts = cluster.getTTClients();
for (TTClient cli : tts) {
cli.getProxy().sendAction(action);
}
}
//Killing the job because all the verification needed
//for this testcase is completed.
rJob.killJob();
}
}
}