mapreduce/src/test/mapred/org/apache/hadoop/tools/TestHarFileSystem.java - hadoop - Git at Google

 /**
  * 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.tools;

 import java.io.IOException;
 import java.net.URI;
 import java.util.Iterator;

 import junit.framework.TestCase;

 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.FileStatus;
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FsShell;
 import org.apache.hadoop.fs.FSDataInputStream;
 import org.apache.hadoop.fs.FSDataOutputStream;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.io.LongWritable;
 import org.apache.hadoop.io.Text;
 import org.apache.hadoop.mapred.*;
 import org.apache.hadoop.tools.HadoopArchives;
 import org.apache.hadoop.util.ToolRunner;
 import org.mortbay.log.Log;

 /**
  * test the har file system
  * create a har filesystem
  * run fs commands
  * and then run a map reduce job
  */
 public class TestHarFileSystem extends TestCase {
   private Path inputPath, inputrelPath;
   private MiniDFSCluster dfscluster;
   private MiniMRCluster mapred;
   private FileSystem fs;
   private Path filea, fileb, filec;
   private Path archivePath;

   protected void setUp() throws Exception {
     super.setUp();
     dfscluster = new MiniDFSCluster(new Configuration(), 2, true, null);
     fs = dfscluster.getFileSystem();
     mapred = new MiniMRCluster(2, fs.getUri().toString(), 1);
     inputPath = new Path(fs.getHomeDirectory(), "test");
     inputrelPath = new Path(fs.getHomeDirectory().toUri().
         getPath().substring(1), "test");
     filea = new Path(inputPath,"a");
     fileb = new Path(inputPath,"b");
     filec = new Path(inputPath,"c c");
     archivePath = new Path(fs.getHomeDirectory(), "tmp");
     fs.mkdirs(inputPath);
     FSDataOutputStream out = fs.create(filea);
     out.write("a".getBytes());
     out.close();
     out = fs.create(fileb);
     out.write("b".getBytes());
     out.close();
     out = fs.create(filec);
     out.write("c".getBytes());
     out.close();
   }

   protected void tearDown() throws Exception {
     try {
       if (mapred != null) {
         mapred.shutdown();
       }
       if (dfscluster != null) {
         dfscluster.shutdown();
       }
     } catch(Exception e) {
       System.err.println(e);
     }
     super.tearDown();
   }

   static class TextMapperReducer implements Mapper<LongWritable, Text, Text, Text>,
             Reducer<Text, Text, Text, Text> {

     public void configure(JobConf conf) {
       //do nothing
     }

     public void map(LongWritable key, Text value, OutputCollector<Text, Text> output, Reporter reporter) throws IOException {
       output.collect(value, new Text(""));
     }

     public void close() throws IOException {
       // do nothing
     }

     public void reduce(Text key, Iterator<Text> values, OutputCollector<Text, Text> output, Reporter reporter) throws IOException {
       while(values.hasNext()) {
         values.next();
         output.collect(key, null);
       }
     }
   }

   /* check bytes in the har output files */
   private void  checkBytes(Path harPath, Configuration conf) throws IOException {
     Path harFilea = new Path(harPath, "a");
     Path harFileb = new Path(harPath, "b");
     Path harFilec = new Path(harPath, "c c");
     FileSystem harFs = harFilea.getFileSystem(conf);
     FSDataInputStream fin = harFs.open(harFilea);
     byte[] b = new byte[4];
     int readBytes = fin.read(b);
     fin.close();
     assertTrue("harFilea strings are unequal.", (b[0] == "a".getBytes()[0]));
     fin = harFs.open(harFileb);
     fin.read(b);
     fin.close();
     assertTrue("harFileb strings are unequal.", (b[0] == "b".getBytes()[0]));
     fin = harFs.open(harFilec);
     fin.read(b);
     fin.close();
     assertTrue("harFilec strings are unequal.", (b[0] == "c".getBytes()[0]));
   }

   private void checkProperties(Path harPath, Configuration conf) throws IOException {
     Path harFilea = new Path(harPath, "a");
     Path harFileb = new Path(harPath, "b");
     Path harFilec = new Path(harPath, "c c");
     FileSystem harFs = harFilea.getFileSystem(conf);

     Path nonharFilea = new Path(inputPath, "a");
     Path nonharFileb = new Path(inputPath, "b");
     Path nonharFilec = new Path(inputPath, "c c");
     FileSystem nonharFs = nonharFilea.getFileSystem(conf);

     assertEquals("Modification times do not match for a",
         harFs.getFileStatus(harFilea).getModificationTime(),
         nonharFs.getFileStatus(nonharFilea).getModificationTime());

     assertEquals("Modification times do not match for b",
         harFs.getFileStatus(harFileb).getModificationTime(),
         nonharFs.getFileStatus(nonharFileb).getModificationTime());

     assertEquals("Modification times do not match for c",
         harFs.getFileStatus(harFilec).getModificationTime(),
         nonharFs.getFileStatus(nonharFilec).getModificationTime());
   }

   /**
    * check if the block size of the part files is what we had specified
    */
   private void checkBlockSize(FileSystem fs, Path finalPath, long blockSize) throws IOException {
     FileStatus[] statuses = fs.globStatus(new Path(finalPath, "part-*"));
     for (FileStatus status: statuses) {
       assertEquals("unexpected blocksize for part-* file", blockSize,
           status.getBlockSize());
     }
   }

   // test archives with a -p option
   public void testRelativeArchives() throws Exception {
     fs.delete(archivePath, true);
     Configuration conf = mapred.createJobConf();
     HadoopArchives har = new HadoopArchives(conf);

     {
       String[] args = new String[6];
       args[0] = "-archiveName";
       args[1] = "foo1.har";
       args[2] = "-p";
       args[3] = fs.getHomeDirectory().toString();
       args[4] = "test";
       args[5] = archivePath.toString();
       int ret = ToolRunner.run(har, args);
       assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
       Path finalPath = new Path(archivePath, "foo1.har");
       Path fsPath = new Path(inputPath.toUri().getPath());
       Path filePath = new Path(finalPath, "test");
       // make it a har path
       Path harPath = new Path("har://" + filePath.toUri().getPath());
       assertTrue("_index missing!", fs.exists(new Path(finalPath, "_index")));
       assertTrue("_masterindex missing!",
                  fs.exists(new Path(finalPath, "_masterindex")));
       // check for existence of only 1 part file, since part file size == 2GB
       assertTrue("part-0 missing!", fs.exists(new Path(finalPath, "part-0")));
       assertTrue("part-1 exists!", !fs.exists(new Path(finalPath, "part-1")));
       assertTrue("part-2 exists!", !fs.exists(new Path(finalPath, "part-2")));
       assertTrue("_logs exists!", !fs.exists(new Path(finalPath, "_logs")));
       FileStatus[] statuses = fs.listStatus(finalPath);
       args = new String[2];
       args[0] = "-ls";
       args[1] = harPath.toString();
       FsShell shell = new FsShell(conf);
       ret = ToolRunner.run(shell, args);
       // fileb and filec
       assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
       checkBytes(harPath, conf);
       checkProperties(harPath, conf);
       /* check block size for path files */
       checkBlockSize(fs, finalPath, 512 * 1024 * 1024l);
     }

     /** now try with different block size and part file size **/
     {
       String[] args = new String[8];
       args[0] = "-Dhar.block.size=512";
       args[1] = "-Dhar.partfile.size=1";
       args[2] = "-archiveName";
       args[3] = "foo.har";
       args[4] = "-p";
       args[5] = fs.getHomeDirectory().toString();
       args[6] = "test";
       args[7] = archivePath.toString();
       int ret = ToolRunner.run(har, args);
       assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
       Path finalPath = new Path(archivePath, "foo.har");
       Path fsPath = new Path(inputPath.toUri().getPath());
       Path filePath = new Path(finalPath, "test");
       // make it a har path
       Path harPath = new Path("har://" + filePath.toUri().getPath());
       assertTrue(fs.exists(new Path(finalPath, "_index")));
       assertTrue(fs.exists(new Path(finalPath, "_masterindex")));
       /*check for existence of 3 part files, since part file size == 1 */
       assertTrue(fs.exists(new Path(finalPath, "part-0")));
       assertTrue(fs.exists(new Path(finalPath, "part-1")));
       assertTrue(fs.exists(new Path(finalPath, "part-2")));
       assertTrue(!fs.exists(new Path(finalPath, "_logs")));
       FileStatus[] statuses = fs.listStatus(finalPath);
       args = new String[2];
       args[0] = "-ls";
       args[1] = harPath.toString();
       FsShell shell = new FsShell(conf);
       ret = ToolRunner.run(shell, args);
       // fileb and filec
       assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
       checkBytes(harPath, conf);
       checkProperties(harPath, conf);
       checkBlockSize(fs, finalPath, 512);
     }
   }

   public void testArchivesWithMapred() throws Exception {
     fs.delete(archivePath, true);
     Configuration conf = mapred.createJobConf();
     HadoopArchives har = new HadoopArchives(conf);
     String[] args = new String[4];

     //check for destination not specified
     args[0] = "-archiveName";
     args[1] = "foo.har";
     args[2] = "-p";
     args[3] = "/";
     int ret = ToolRunner.run(har, args);
     assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
     args = new String[6];
     //check for wrong archiveName
     args[0] = "-archiveName";
     args[1] = "/d/foo.har";
     args[2] = "-p";
     args[3] = "/";
     args[4] = inputrelPath.toString();
     args[5] = archivePath.toString();
     ret = ToolRunner.run(har, args);
     assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
     // see if dest is a file
     args[1] = "foo.har";
     args[5] = filec.toString();
     ret = ToolRunner.run(har, args);
     assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
     //this is a valid run
     args[0] = "-archiveName";
     args[1] = "foo.har";
     args[2] = "-p";
     args[3] = "/";
     args[4] = inputrelPath.toString();
     args[5] = archivePath.toString();
     ret = ToolRunner.run(har, args);
     // check for the existence of the archive
     assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
     ///try running it again. it should not
     // override the directory
     ret = ToolRunner.run(har, args);
     assertTrue("ToolRunner.run('-archiveName') rerun did NOT fail.", ret != 0);
     Path finalPath = new Path(archivePath, "foo.har");
     Path fsPath = new Path(inputPath.toUri().getPath());
     String relative = fsPath.toString().substring(1);
     Path filePath = new Path(finalPath, relative);
     //make it a har path
     URI uri = fs.getUri();
     Path harPath = new Path("har://" + "hdfs-" + uri.getHost() +":" +
         uri.getPort() + filePath.toUri().getPath());
     assertTrue(fs.exists(new Path(finalPath, "_index")));
     assertTrue(fs.exists(new Path(finalPath, "_masterindex")));
     assertTrue(!fs.exists(new Path(finalPath, "_logs")));
     //creation tested
     //check if the archive is same
     // do ls and cat on all the files

     FsShell shell = new FsShell(conf);
     args = new String[2];
     args[0] = "-ls";
     args[1] = harPath.toString();
     ret = ToolRunner.run(shell, args);
     // ls should work.
     assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
     // now check for contents of filea, fileb, and filec
     Path harFilea = new Path(harPath, "a");
     Path harFileb = new Path(harPath, "b");
     Path harFilec = new Path(harPath, "c c");
     FileSystem harFs = harFilea.getFileSystem(conf);
     FSDataInputStream fin = harFs.open(harFilea);
     byte[] b = new byte[4];
     int readBytes = fin.read(b);
     assertTrue("Empty read.", readBytes > 0);
     fin.close();
     assertTrue("harFilea strings are unequal.", (b[0] == "a".getBytes()[0]));
     fin = harFs.open(harFileb);
     readBytes = fin.read(b);
     assertTrue("Empty read.", readBytes > 0);
     fin.close();
     assertTrue("harFileb strings are unequal.", (b[0] == "b".getBytes()[0]));
     fin = harFs.open(harFilec);
     readBytes = fin.read(b);
     assertTrue("Empty read.", readBytes > 0);
     fin.close();
     assertTrue("harFilec strings are unequal.", (b[0] == "c".getBytes()[0]));
     // ok all files match
     // run a map reduce job
     FileSystem fsHar = harPath.getFileSystem(conf);
     FileStatus[] bla = fsHar.listStatus(harPath);
     Path outdir = new Path(fs.getHomeDirectory(), "mapout");
     JobConf jobconf = mapred.createJobConf();
     FileInputFormat.addInputPath(jobconf, harPath);
     jobconf.setInputFormat(TextInputFormat.class);
     jobconf.setOutputFormat(TextOutputFormat.class);
     FileOutputFormat.setOutputPath(jobconf, outdir);
     jobconf.setMapperClass(TextMapperReducer.class);
     jobconf.setMapOutputKeyClass(Text.class);
     jobconf.setMapOutputValueClass(Text.class);
     jobconf.setReducerClass(TextMapperReducer.class);
     jobconf.setNumReduceTasks(1);
     JobClient.runJob(jobconf);
     args[1] = outdir.toString();
     ret = ToolRunner.run(shell, args);

     FileStatus[] status = fs.globStatus(new Path(outdir, "part*"));
     Path reduceFile = status[0].getPath();
     FSDataInputStream reduceIn = fs.open(reduceFile);
     b = new byte[6];
     readBytes = reduceIn.read(b);
     assertEquals("Should read 6 bytes instead of "+readBytes+".", 6, readBytes);
     //assuming all the 6 bytes were read.
     Text readTxt = new Text(b);
     assertTrue("string read from reduceIn doesn't match expected value.",
       "a\nb\nc\n".equals(readTxt.toString()));
     assertEquals("number of bytes left should be -1.", -1, reduceIn.read(b));
     reduceIn.close();
   }
 }
	/**
	* 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.tools;

	import java.io.IOException;
	import java.net.URI;
	import java.util.Iterator;

	import junit.framework.TestCase;

	import org.apache.hadoop.conf.Configuration;
	import org.apache.hadoop.fs.FileStatus;
	import org.apache.hadoop.fs.FileSystem;
	import org.apache.hadoop.fs.FsShell;
	import org.apache.hadoop.fs.FSDataInputStream;
	import org.apache.hadoop.fs.FSDataOutputStream;
	import org.apache.hadoop.fs.Path;
	import org.apache.hadoop.hdfs.MiniDFSCluster;
	import org.apache.hadoop.io.LongWritable;
	import org.apache.hadoop.io.Text;
	import org.apache.hadoop.mapred.*;
	import org.apache.hadoop.tools.HadoopArchives;
	import org.apache.hadoop.util.ToolRunner;
	import org.mortbay.log.Log;

	/**
	* test the har file system
	* create a har filesystem
	* run fs commands
	* and then run a map reduce job
	*/
	public class TestHarFileSystem extends TestCase {
	private Path inputPath, inputrelPath;
	private MiniDFSCluster dfscluster;
	private MiniMRCluster mapred;
	private FileSystem fs;
	private Path filea, fileb, filec;
	private Path archivePath;

	protected void setUp() throws Exception {
	super.setUp();
	dfscluster = new MiniDFSCluster(new Configuration(), 2, true, null);
	fs = dfscluster.getFileSystem();
	mapred = new MiniMRCluster(2, fs.getUri().toString(), 1);
	inputPath = new Path(fs.getHomeDirectory(), "test");
	inputrelPath = new Path(fs.getHomeDirectory().toUri().
	getPath().substring(1), "test");
	filea = new Path(inputPath,"a");
	fileb = new Path(inputPath,"b");
	filec = new Path(inputPath,"c c");
	archivePath = new Path(fs.getHomeDirectory(), "tmp");
	fs.mkdirs(inputPath);
	FSDataOutputStream out = fs.create(filea);
	out.write("a".getBytes());
	out.close();
	out = fs.create(fileb);
	out.write("b".getBytes());
	out.close();
	out = fs.create(filec);
	out.write("c".getBytes());
	out.close();
	}

	protected void tearDown() throws Exception {
	try {
	if (mapred != null) {
	mapred.shutdown();
	}
	if (dfscluster != null) {
	dfscluster.shutdown();
	}
	} catch(Exception e) {
	System.err.println(e);
	}
	super.tearDown();
	}

	static class TextMapperReducer implements Mapper<LongWritable, Text, Text, Text>,
	Reducer<Text, Text, Text, Text> {

	public void configure(JobConf conf) {
	//do nothing
	}

	public void map(LongWritable key, Text value, OutputCollector<Text, Text> output, Reporter reporter) throws IOException {
	output.collect(value, new Text(""));
	}

	public void close() throws IOException {
	// do nothing
	}

	public void reduce(Text key, Iterator<Text> values, OutputCollector<Text, Text> output, Reporter reporter) throws IOException {
	while(values.hasNext()) {
	values.next();
	output.collect(key, null);
	}
	}
	}

	/* check bytes in the har output files */
	private void checkBytes(Path harPath, Configuration conf) throws IOException {
	Path harFilea = new Path(harPath, "a");
	Path harFileb = new Path(harPath, "b");
	Path harFilec = new Path(harPath, "c c");
	FileSystem harFs = harFilea.getFileSystem(conf);
	FSDataInputStream fin = harFs.open(harFilea);
	byte[] b = new byte[4];
	int readBytes = fin.read(b);
	fin.close();
	assertTrue("harFilea strings are unequal.", (b[0] == "a".getBytes()[0]));
	fin = harFs.open(harFileb);
	fin.read(b);
	fin.close();
	assertTrue("harFileb strings are unequal.", (b[0] == "b".getBytes()[0]));
	fin = harFs.open(harFilec);
	fin.read(b);
	fin.close();
	assertTrue("harFilec strings are unequal.", (b[0] == "c".getBytes()[0]));
	}

	private void checkProperties(Path harPath, Configuration conf) throws IOException {
	Path harFilea = new Path(harPath, "a");
	Path harFileb = new Path(harPath, "b");
	Path harFilec = new Path(harPath, "c c");
	FileSystem harFs = harFilea.getFileSystem(conf);

	Path nonharFilea = new Path(inputPath, "a");
	Path nonharFileb = new Path(inputPath, "b");
	Path nonharFilec = new Path(inputPath, "c c");
	FileSystem nonharFs = nonharFilea.getFileSystem(conf);

	assertEquals("Modification times do not match for a",
	harFs.getFileStatus(harFilea).getModificationTime(),
	nonharFs.getFileStatus(nonharFilea).getModificationTime());

	assertEquals("Modification times do not match for b",
	harFs.getFileStatus(harFileb).getModificationTime(),
	nonharFs.getFileStatus(nonharFileb).getModificationTime());

	assertEquals("Modification times do not match for c",
	harFs.getFileStatus(harFilec).getModificationTime(),
	nonharFs.getFileStatus(nonharFilec).getModificationTime());
	}

	/**
	* check if the block size of the part files is what we had specified
	*/
	private void checkBlockSize(FileSystem fs, Path finalPath, long blockSize) throws IOException {
	FileStatus[] statuses = fs.globStatus(new Path(finalPath, "part-*"));
	for (FileStatus status: statuses) {
	assertEquals("unexpected blocksize for part-* file", blockSize,
	status.getBlockSize());
	}
	}

	// test archives with a -p option
	public void testRelativeArchives() throws Exception {
	fs.delete(archivePath, true);
	Configuration conf = mapred.createJobConf();
	HadoopArchives har = new HadoopArchives(conf);

	{
	String[] args = new String[6];
	args[0] = "-archiveName";
	args[1] = "foo1.har";
	args[2] = "-p";
	args[3] = fs.getHomeDirectory().toString();
	args[4] = "test";
	args[5] = archivePath.toString();
	int ret = ToolRunner.run(har, args);
	assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
	Path finalPath = new Path(archivePath, "foo1.har");
	Path fsPath = new Path(inputPath.toUri().getPath());
	Path filePath = new Path(finalPath, "test");
	// make it a har path
	Path harPath = new Path("har://" + filePath.toUri().getPath());
	assertTrue("_index missing!", fs.exists(new Path(finalPath, "_index")));
	assertTrue("_masterindex missing!",
	fs.exists(new Path(finalPath, "_masterindex")));
	// check for existence of only 1 part file, since part file size == 2GB
	assertTrue("part-0 missing!", fs.exists(new Path(finalPath, "part-0")));
	assertTrue("part-1 exists!", !fs.exists(new Path(finalPath, "part-1")));
	assertTrue("part-2 exists!", !fs.exists(new Path(finalPath, "part-2")));
	assertTrue("_logs exists!", !fs.exists(new Path(finalPath, "_logs")));
	FileStatus[] statuses = fs.listStatus(finalPath);
	args = new String[2];
	args[0] = "-ls";
	args[1] = harPath.toString();
	FsShell shell = new FsShell(conf);
	ret = ToolRunner.run(shell, args);
	// fileb and filec
	assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
	checkBytes(harPath, conf);
	checkProperties(harPath, conf);
	/* check block size for path files */
	checkBlockSize(fs, finalPath, 512 * 1024 * 1024l);
	}

	/ now try with different block size and part file size /
	{
	String[] args = new String[8];
	args[0] = "-Dhar.block.size=512";
	args[1] = "-Dhar.partfile.size=1";
	args[2] = "-archiveName";
	args[3] = "foo.har";
	args[4] = "-p";
	args[5] = fs.getHomeDirectory().toString();
	args[6] = "test";
	args[7] = archivePath.toString();
	int ret = ToolRunner.run(har, args);
	assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
	Path finalPath = new Path(archivePath, "foo.har");
	Path fsPath = new Path(inputPath.toUri().getPath());
	Path filePath = new Path(finalPath, "test");
	// make it a har path
	Path harPath = new Path("har://" + filePath.toUri().getPath());
	assertTrue(fs.exists(new Path(finalPath, "_index")));
	assertTrue(fs.exists(new Path(finalPath, "_masterindex")));
	/check for existence of 3 part files, since part file size == 1 /
	assertTrue(fs.exists(new Path(finalPath, "part-0")));
	assertTrue(fs.exists(new Path(finalPath, "part-1")));
	assertTrue(fs.exists(new Path(finalPath, "part-2")));
	assertTrue(!fs.exists(new Path(finalPath, "_logs")));
	FileStatus[] statuses = fs.listStatus(finalPath);
	args = new String[2];
	args[0] = "-ls";
	args[1] = harPath.toString();
	FsShell shell = new FsShell(conf);
	ret = ToolRunner.run(shell, args);
	// fileb and filec
	assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
	checkBytes(harPath, conf);
	checkProperties(harPath, conf);
	checkBlockSize(fs, finalPath, 512);
	}
	}

	public void testArchivesWithMapred() throws Exception {
	fs.delete(archivePath, true);
	Configuration conf = mapred.createJobConf();
	HadoopArchives har = new HadoopArchives(conf);
	String[] args = new String[4];

	//check for destination not specified
	args[0] = "-archiveName";
	args[1] = "foo.har";
	args[2] = "-p";
	args[3] = "/";
	int ret = ToolRunner.run(har, args);
	assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
	args = new String[6];
	//check for wrong archiveName
	args[0] = "-archiveName";
	args[1] = "/d/foo.har";
	args[2] = "-p";
	args[3] = "/";
	args[4] = inputrelPath.toString();
	args[5] = archivePath.toString();
	ret = ToolRunner.run(har, args);
	assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
	// see if dest is a file
	args[1] = "foo.har";
	args[5] = filec.toString();
	ret = ToolRunner.run(har, args);
	assertFalse("bogus ToolRunner.run('-archiveName') didn't fail??", 0 == ret);
	//this is a valid run
	args[0] = "-archiveName";
	args[1] = "foo.har";
	args[2] = "-p";
	args[3] = "/";
	args[4] = inputrelPath.toString();
	args[5] = archivePath.toString();
	ret = ToolRunner.run(har, args);
	// check for the existence of the archive
	assertEquals("ToolRunner.run('-archiveName') failed.", 0, ret);
	///try running it again. it should not
	// override the directory
	ret = ToolRunner.run(har, args);
	assertTrue("ToolRunner.run('-archiveName') rerun did NOT fail.", ret != 0);
	Path finalPath = new Path(archivePath, "foo.har");
	Path fsPath = new Path(inputPath.toUri().getPath());
	String relative = fsPath.toString().substring(1);
	Path filePath = new Path(finalPath, relative);
	//make it a har path
	URI uri = fs.getUri();
	Path harPath = new Path("har://" + "hdfs-" + uri.getHost() +":" +
	uri.getPort() + filePath.toUri().getPath());
	assertTrue(fs.exists(new Path(finalPath, "_index")));
	assertTrue(fs.exists(new Path(finalPath, "_masterindex")));
	assertTrue(!fs.exists(new Path(finalPath, "_logs")));
	//creation tested
	//check if the archive is same
	// do ls and cat on all the files

	FsShell shell = new FsShell(conf);
	args = new String[2];
	args[0] = "-ls";
	args[1] = harPath.toString();
	ret = ToolRunner.run(shell, args);
	// ls should work.
	assertEquals("ToolRunner.run('-ls') failed.", 0, ret);
	// now check for contents of filea, fileb, and filec
	Path harFilea = new Path(harPath, "a");
	Path harFileb = new Path(harPath, "b");
	Path harFilec = new Path(harPath, "c c");
	FileSystem harFs = harFilea.getFileSystem(conf);
	FSDataInputStream fin = harFs.open(harFilea);
	byte[] b = new byte[4];
	int readBytes = fin.read(b);
	assertTrue("Empty read.", readBytes > 0);
	fin.close();
	assertTrue("harFilea strings are unequal.", (b[0] == "a".getBytes()[0]));
	fin = harFs.open(harFileb);
	readBytes = fin.read(b);
	assertTrue("Empty read.", readBytes > 0);
	fin.close();
	assertTrue("harFileb strings are unequal.", (b[0] == "b".getBytes()[0]));
	fin = harFs.open(harFilec);
	readBytes = fin.read(b);
	assertTrue("Empty read.", readBytes > 0);
	fin.close();
	assertTrue("harFilec strings are unequal.", (b[0] == "c".getBytes()[0]));
	// ok all files match
	// run a map reduce job
	FileSystem fsHar = harPath.getFileSystem(conf);
	FileStatus[] bla = fsHar.listStatus(harPath);
	Path outdir = new Path(fs.getHomeDirectory(), "mapout");
	JobConf jobconf = mapred.createJobConf();
	FileInputFormat.addInputPath(jobconf, harPath);
	jobconf.setInputFormat(TextInputFormat.class);
	jobconf.setOutputFormat(TextOutputFormat.class);
	FileOutputFormat.setOutputPath(jobconf, outdir);
	jobconf.setMapperClass(TextMapperReducer.class);
	jobconf.setMapOutputKeyClass(Text.class);
	jobconf.setMapOutputValueClass(Text.class);
	jobconf.setReducerClass(TextMapperReducer.class);
	jobconf.setNumReduceTasks(1);
	JobClient.runJob(jobconf);
	args[1] = outdir.toString();
	ret = ToolRunner.run(shell, args);

	FileStatus[] status = fs.globStatus(new Path(outdir, "part*"));
	Path reduceFile = status[0].getPath();
	FSDataInputStream reduceIn = fs.open(reduceFile);
	b = new byte[6];
	readBytes = reduceIn.read(b);
	assertEquals("Should read 6 bytes instead of "+readBytes+".", 6, readBytes);
	//assuming all the 6 bytes were read.
	Text readTxt = new Text(b);
	assertTrue("string read from reduceIn doesn't match expected value.",
	"a\nb\nc\n".equals(readTxt.toString()));
	assertEquals("number of bytes left should be -1.", -1, reduceIn.read(b));
	reduceIn.close();
	}
	}