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From jl...@apache.org
Subject git commit: MAPREDUCE-5885. build/test/test.mapred.spill causes release audit warnings. Contributed by Chen He (cherry picked from commit 812bd0c0e583fce925e3151510860ca9781b3e40)
Date Wed, 27 Aug 2014 15:33:00 GMT
Repository: hadoop
Updated Branches:
  refs/heads/branch-2 0c785f082 -> 38df62936


MAPREDUCE-5885. build/test/test.mapred.spill causes release audit warnings. Contributed by
Chen He
(cherry picked from commit 812bd0c0e583fce925e3151510860ca9781b3e40)


Project: http://git-wip-us.apache.org/repos/asf/hadoop/repo
Commit: http://git-wip-us.apache.org/repos/asf/hadoop/commit/38df6293
Tree: http://git-wip-us.apache.org/repos/asf/hadoop/tree/38df6293
Diff: http://git-wip-us.apache.org/repos/asf/hadoop/diff/38df6293

Branch: refs/heads/branch-2
Commit: 38df6293675d4e972f5e31b862eae2cf211ddccf
Parents: 0c785f0
Author: Jason Lowe <jlowe@apache.org>
Authored: Wed Aug 27 15:14:54 2014 +0000
Committer: Jason Lowe <jlowe@apache.org>
Committed: Wed Aug 27 15:22:06 2014 +0000

----------------------------------------------------------------------
 hadoop-mapreduce-project/CHANGES.txt            |  3 +
 .../apache/hadoop/mapred/TestComparators.java   | 61 +++++++++++++------
 .../apache/hadoop/mapred/TestMapOutputType.java | 62 ++++++++++++--------
 .../org/apache/hadoop/mapred/TestMapRed.java    | 28 ++++++---
 .../mapred/lib/TestKeyFieldBasedComparator.java | 25 +++++++-
 .../apache/hadoop/mapreduce/TestMapReduce.java  | 30 +++++++---
 6 files changed, 150 insertions(+), 59 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/CHANGES.txt
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/CHANGES.txt b/hadoop-mapreduce-project/CHANGES.txt
index 02a0a62..6f07104 100644
--- a/hadoop-mapreduce-project/CHANGES.txt
+++ b/hadoop-mapreduce-project/CHANGES.txt
@@ -99,6 +99,9 @@ Release 2.6.0 - UNRELEASED
     MAPREDUCE-6044. Fully qualified intermediate done dir path breaks per-user dir
     creation on Windows. (zjshen)
 
+    MAPREDUCE-5885. build/test/test.mapred.spill causes release audit warnings
+    (Chen He via jlowe)
+
 Release 2.5.1 - UNRELEASED
 
   INCOMPATIBLE CHANGES

http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestComparators.java
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestComparators.java
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestComparators.java
index 1cef5cb..f83dbe2 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestComparators.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestComparators.java
@@ -17,13 +17,30 @@
  */
 package org.apache.hadoop.mapred;
 
-import org.apache.hadoop.fs.*;
-import org.apache.hadoop.io.*;
+import java.io.DataInput;
+import java.io.DataOutput;
+import java.io.File;
+import java.io.IOException;
+import java.util.Iterator;
+import java.util.Random;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.io.SequenceFile;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.io.Writable;
+import org.apache.hadoop.io.WritableComparable;
+import org.apache.hadoop.io.WritableComparator;
 import org.apache.hadoop.mapreduce.MRConfig;
 
-import junit.framework.TestCase;
-import java.io.*;
-import java.util.*;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+import static org.junit.Assert.assertTrue;
+import static org.junit.Assert.fail;
+
 
 /**
  * Two different types of comparators can be used in MapReduce. One is used
@@ -37,8 +54,11 @@ import java.util.*;
  * 2. Test the common use case where values are grouped by keys but values 
  * within each key are grouped by a secondary key (a timestamp, for example). 
  */
-public class TestComparators extends TestCase 
-{
+public class TestComparators {
+  private static final File TEST_DIR = new File(
+      System.getProperty("test.build.data",
+          System.getProperty("java.io.tmpdir")), "TestComparators-mapred");
+
   JobConf conf = new JobConf(TestMapOutputType.class);
   JobClient jc;
   static Random rng = new Random();
@@ -292,9 +312,9 @@ public class TestComparators extends TestCase
     }
   }
 
-
+  @Before
   public void configure() throws Exception {
-    Path testdir = new Path("build/test/test.mapred.spill");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath());
     Path inDir = new Path(testdir, "in");
     Path outDir = new Path(testdir, "out");
     FileSystem fs = FileSystem.get(conf);
@@ -334,14 +354,18 @@ public class TestComparators extends TestCase
     
     jc = new JobClient(conf);
   }
-  
+
+  @After
+  public void cleanup() {
+    FileUtil.fullyDelete(TEST_DIR);
+  }
   /**
    * Test the default comparator for Map/Reduce. 
    * Use the identity mapper and see if the keys are sorted at the end
    * @throws Exception
    */
-  public void testDefaultMRComparator() throws Exception { 
-    configure();
+  @Test
+  public void testDefaultMRComparator() throws Exception {
     conf.setMapperClass(IdentityMapper.class);
     conf.setReducerClass(AscendingKeysReducer.class);
     
@@ -361,8 +385,8 @@ public class TestComparators extends TestCase
    * comparator. Keys should be sorted in reverse order in the reducer. 
    * @throws Exception
    */
-  public void testUserMRComparator() throws Exception { 
-    configure();
+  @Test
+  public void testUserMRComparator() throws Exception {
     conf.setMapperClass(IdentityMapper.class);
     conf.setReducerClass(DescendingKeysReducer.class);
     conf.setOutputKeyComparatorClass(DecreasingIntComparator.class);
@@ -384,8 +408,8 @@ public class TestComparators extends TestCase
    * values for a key should be sorted by the 'timestamp'. 
    * @throws Exception
    */
-  public void testUserValueGroupingComparator() throws Exception { 
-    configure();
+  @Test
+  public void testUserValueGroupingComparator() throws Exception {
     conf.setMapperClass(RandomGenMapper.class);
     conf.setReducerClass(AscendingGroupReducer.class);
     conf.setOutputValueGroupingComparator(CompositeIntGroupFn.class);
@@ -409,8 +433,8 @@ public class TestComparators extends TestCase
    * order. This lets us make sure that the right comparators are used. 
    * @throws Exception
    */
-  public void testAllUserComparators() throws Exception { 
-    configure();
+  @Test
+  public void testAllUserComparators() throws Exception {
     conf.setMapperClass(RandomGenMapper.class);
     // use a decreasing comparator so keys are sorted in reverse order
     conf.setOutputKeyComparatorClass(DecreasingIntComparator.class);
@@ -430,6 +454,7 @@ public class TestComparators extends TestCase
    * Test a user comparator that relies on deserializing both arguments
    * for each compare.
    */
+  @Test
   public void testBakedUserComparator() throws Exception {
     MyWritable a = new MyWritable(8, 8);
     MyWritable b = new MyWritable(7, 9);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapOutputType.java
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapOutputType.java
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapOutputType.java
index d11d7bc..e3860fd 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapOutputType.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapOutputType.java
@@ -17,21 +17,36 @@
  */
 package org.apache.hadoop.mapred;
 
-import org.apache.hadoop.fs.*;
-import org.apache.hadoop.io.*;
-import org.apache.hadoop.mapred.lib.*;
+import java.io.File;
+import java.io.IOException;
+import java.util.Iterator;
+
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.FileUtil;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.io.SequenceFile;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.io.Writable;
+import org.apache.hadoop.io.WritableComparable;
 import org.apache.hadoop.mapreduce.MRConfig;
-import junit.framework.TestCase;
-import java.io.*;
-import java.util.*;
+
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.junit.Assert.fail;
+
 
 /** 
  * TestMapOutputType checks whether the Map task handles type mismatch
  * between mapper output and the type specified in
  * JobConf.MapOutputKeyType and JobConf.MapOutputValueType.
  */
-public class TestMapOutputType extends TestCase 
-{
+public class TestMapOutputType {
+  private static final File TEST_DIR = new File(
+      System.getProperty("test.build.data",
+          System.getProperty("java.io.tmpdir")), "TestMapOutputType-mapred");
   JobConf conf = new JobConf(TestMapOutputType.class);
   JobClient jc;
   /** 
@@ -75,9 +90,9 @@ public class TestMapOutputType extends TestCase
     }
   }
 
-
+  @Before
   public void configure() throws Exception {
-    Path testdir = new Path("build/test/test.mapred.spill");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath());
     Path inDir = new Path(testdir, "in");
     Path outDir = new Path(testdir, "out");
     FileSystem fs = FileSystem.get(conf);
@@ -101,17 +116,21 @@ public class TestMapOutputType extends TestCase
       throw new IOException("Mkdirs failed to create " + inDir.toString());
     }
     Path inFile = new Path(inDir, "part0");
-    SequenceFile.Writer writer = SequenceFile.createWriter(fs, conf, inFile, 
+    SequenceFile.Writer writer = SequenceFile.createWriter(fs, conf, inFile,
                                                            Text.class, Text.class);
     writer.append(new Text("rec: 1"), new Text("Hello"));
     writer.close();
     
     jc = new JobClient(conf);
   }
-  
+
+  @After
+  public void cleanup() {
+    FileUtil.fullyDelete(TEST_DIR);
+  }
+
+  @Test
   public void testKeyMismatch() throws Exception {
-    configure();
-    
     //  Set bad MapOutputKeyClass and MapOutputValueClass
     conf.setMapOutputKeyClass(IntWritable.class);
     conf.setMapOutputValueClass(IntWritable.class);
@@ -125,11 +144,9 @@ public class TestMapOutputType extends TestCase
       fail("Oops! The job was supposed to break due to an exception");
     }
   }
-  
+
+  @Test
   public void testValueMismatch() throws Exception {
-    configure();
-  
-    // Set good MapOutputKeyClass, bad MapOutputValueClass    
     conf.setMapOutputKeyClass(Text.class);
     conf.setMapOutputValueClass(IntWritable.class);
     
@@ -142,11 +159,10 @@ public class TestMapOutputType extends TestCase
       fail("Oops! The job was supposed to break due to an exception");
     }
   }
-  
-  public void testNoMismatch() throws Exception{ 
-    configure();
-    
-    //  Set good MapOutputKeyClass and MapOutputValueClass    
+
+  @Test
+  public void testNoMismatch() throws Exception{
+    //  Set good MapOutputKeyClass and MapOutputValueClass
     conf.setMapOutputKeyClass(Text.class);
     conf.setMapOutputValueClass(Text.class);
      

http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapRed.java
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapRed.java
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapRed.java
index 3f7a6f7..02a083b 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapRed.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMapRed.java
@@ -24,7 +24,7 @@ import java.io.DataOutputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
-import java.util.Collections;
+import java.io.File;
 import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.Iterator;
@@ -34,6 +34,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.conf.Configured;
 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.io.IntWritable;
 import org.apache.hadoop.io.NullWritable;
@@ -46,11 +47,11 @@ import org.apache.hadoop.mapred.lib.IdentityReducer;
 import org.apache.hadoop.mapreduce.MRConfig;
 import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
+import org.junit.After;
 import org.junit.Test;
 
 import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
 
 /**********************************************************
  * MapredLoadTest generates a bunch of work that exercises
@@ -110,6 +111,10 @@ public class TestMapRed extends Configured implements Tool {
    * of numbers in random order, but where each number appears
    * as many times as we were instructed.
    */
+  private static final File TEST_DIR = new File(
+      System.getProperty("test.build.data",
+          System.getProperty("java.io.tmpdir")), "TestMapRed-mapred");
+
   static class RandomGenMapper
     implements Mapper<IntWritable, IntWritable, IntWritable, IntWritable> {
     
@@ -248,6 +253,11 @@ public class TestMapRed extends Configured implements Tool {
   private static int counts = 100;
   private static Random r = new Random();
 
+  @After
+  public void cleanup() {
+    FileUtil.fullyDelete(TEST_DIR);
+  }
+
   /**
      public TestMapRed(int range, int counts, Configuration conf) throws IOException {
      this.range = range;
@@ -372,7 +382,7 @@ public class TestMapRed extends Configured implements Tool {
                                 boolean includeCombine
                                 ) throws Exception {
     JobConf conf = new JobConf(TestMapRed.class);
-    Path testdir = new Path("build/test/test.mapred.compress");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath());
     Path inDir = new Path(testdir, "in");
     Path outDir = new Path(testdir, "out");
     FileSystem fs = FileSystem.get(conf);
@@ -440,7 +450,7 @@ public class TestMapRed extends Configured implements Tool {
     //
     // Generate distribution of ints.  This is the answer key.
     //
-    JobConf conf = null;
+    JobConf conf;
     //Check to get configuration and check if it is configured thro' Configured
     //interface. This would happen when running testcase thro' command line.
     if(getConf() == null) {
@@ -465,7 +475,7 @@ public class TestMapRed extends Configured implements Tool {
     // Write the answer key to a file.  
     //
     FileSystem fs = FileSystem.get(conf);
-    Path testdir = new Path("mapred.loadtest");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath(), "mapred.loadtest");
     if (!fs.mkdirs(testdir)) {
       throw new IOException("Mkdirs failed to create " + testdir.toString());
     }
@@ -635,8 +645,8 @@ public class TestMapRed extends Configured implements Tool {
       in.close();
     }
     int originalTotal = 0;
-    for (int i = 0; i < dist.length; i++) {
-      originalTotal += dist[i];
+    for (int aDist : dist) {
+      originalTotal += aDist;
     }
     System.out.println("Original sum: " + originalTotal);
     System.out.println("Recomputed sum: " + totalseen);
@@ -727,7 +737,7 @@ public class TestMapRed extends Configured implements Tool {
   public void runJob(int items) {
     try {
       JobConf conf = new JobConf(TestMapRed.class);
-      Path testdir = new Path("build/test/test.mapred.spill");
+      Path testdir = new Path(TEST_DIR.getAbsolutePath());
       Path inDir = new Path(testdir, "in");
       Path outDir = new Path(testdir, "out");
       FileSystem fs = FileSystem.get(conf);
@@ -777,7 +787,7 @@ public class TestMapRed extends Configured implements Tool {
       System.err.println("Usage: TestMapRed <range> <counts>");
       System.err.println();
       System.err.println("Note: a good test will have a " +
-      		"<counts> value that is substantially larger than the <range>");
+          "<counts> value that is substantially larger than the <range>");
       return -1;
     }
 

http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/lib/TestKeyFieldBasedComparator.java
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/lib/TestKeyFieldBasedComparator.java
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/lib/TestKeyFieldBasedComparator.java
index 0bee2b5..34a4d2c 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/lib/TestKeyFieldBasedComparator.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/lib/TestKeyFieldBasedComparator.java
@@ -18,7 +18,6 @@
 
 package org.apache.hadoop.mapred.lib;
 
-import java.io.*;
 
 import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.FileUtil;
@@ -35,9 +34,23 @@ import org.apache.hadoop.mapred.RunningJob;
 import org.apache.hadoop.mapred.TextInputFormat;
 import org.apache.hadoop.mapred.TextOutputFormat;
 import org.apache.hadoop.mapred.Utils;
+import org.junit.After;
+import org.junit.Test;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 
 
 public class TestKeyFieldBasedComparator extends HadoopTestCase {
+
+  private static final File TEST_DIR = new File(
+      System.getProperty("test.build.data",
+          System.getProperty("java.io.tmpdir")),
+          "TestKeyFieldBasedComparator-lib");
   JobConf conf;
   JobConf localConf;
   
@@ -50,8 +63,9 @@ public class TestKeyFieldBasedComparator extends HadoopTestCase {
     localConf = createJobConf();
     localConf.set(JobContext.MAP_OUTPUT_KEY_FIELD_SEPERATOR, " ");
   }
+
   public void configure(String keySpec, int expect) throws Exception {
-    Path testdir = new Path("build/test/test.mapred.spill");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath());
     Path inDir = new Path(testdir, "in");
     Path outDir = new Path(testdir, "out");
     FileSystem fs = getFileSystem();
@@ -116,6 +130,13 @@ public class TestKeyFieldBasedComparator extends HadoopTestCase {
       reader.close();
     }
   }
+
+  @After
+  public void cleanup() {
+    FileUtil.fullyDelete(TEST_DIR);
+  }
+
+  @Test
   public void testBasicUnixComparator() throws Exception {
     configure("-k1,1n", 1);
     configure("-k2,2n", 1);

http://git-wip-us.apache.org/repos/asf/hadoop/blob/38df6293/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduce.java
----------------------------------------------------------------------
diff --git a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduce.java
b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduce.java
index 01e1283..48ad47a 100644
--- a/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduce.java
+++ b/hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/TestMapReduce.java
@@ -23,14 +23,14 @@ import java.io.DataInputStream;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.io.OutputStreamWriter;
+import java.io.File;
 import java.util.Iterator;
 import java.util.Random;
 
-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.FileUtil;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.io.IntWritable;
 import org.apache.hadoop.io.SequenceFile;
@@ -41,6 +41,10 @@ import org.apache.hadoop.mapreduce.lib.input.SequenceFileInputFormat;
 import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
 import org.apache.hadoop.mapreduce.lib.output.MapFileOutputFormat;
 import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
+import org.junit.After;
+import org.junit.Test;
+
+import static org.junit.Assert.assertTrue;
 
 /**********************************************************
  * MapredLoadTest generates a bunch of work that exercises
@@ -75,8 +79,10 @@ import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;
  * 7) A mapred job integrates all the count files into a single one.
  *
  **********************************************************/
-public class TestMapReduce extends TestCase {
-  
+public class TestMapReduce {
+  private static final File TEST_DIR = new File(
+      System.getProperty("test.build.data",
+          System.getProperty("java.io.tmpdir")), "TestMapReduce-mapreduce");
   private static FileSystem fs;
   
   static {
@@ -215,6 +221,12 @@ public class TestMapReduce extends TestCase {
   private static int counts = 100;
   private static Random r = new Random();
 
+  @After
+  public void cleanup() {
+    FileUtil.fullyDelete(TEST_DIR);
+  }
+
+  @Test
   public void testMapred() throws Exception {
     launch();
   }
@@ -239,7 +251,7 @@ public class TestMapReduce extends TestCase {
     //
     // Write the answer key to a file.  
     //
-    Path testdir = new Path("mapred.loadtest");
+    Path testdir = new Path(TEST_DIR.getAbsolutePath());
     if (!fs.mkdirs(testdir)) {
       throw new IOException("Mkdirs failed to create " + testdir.toString());
     }
@@ -488,13 +500,17 @@ public class TestMapReduce extends TestCase {
       System.err.println("Usage: TestMapReduce <range> <counts>");
       System.err.println();
       System.err.println("Note: a good test will have a <counts> value" +
-        " that is substantially larger than the <range>");
+          " that is substantially larger than the <range>");
       return;
     }
 
     int i = 0;
     range = Integer.parseInt(argv[i++]);
     counts = Integer.parseInt(argv[i++]);
-    launch();
+    try {
+      launch();
+    } finally {
+      FileUtil.fullyDelete(TEST_DIR);
+    }
   }
 }


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