Merging r1539245 through r1539736 from trunk to branch HDFS-2832

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-2832@1539737 13f79535-47bb-0310-9956-ffa450edef68

hadoop-common-project/hadoop-common/CHANGES.txt

@@ -431,6 +431,9 @@ Release 2.2.1 - UNRELEASED
     HADOOP-10079. log a warning message if group resolution takes too long.
     (cmccabe)
 
+    HADOOP-9623 Update jets3t dependency to 0.9.0.  (Amandeep Khurana via Colin
+    Patrick McCabe)
+
   OPTIMIZATIONS
 
   BUG FIXES
@@ -460,6 +463,10 @@ Release 2.2.1 - UNRELEASED
     HADOOP-9478. Fix race conditions during the initialization of Configuration
     related to deprecatedKeyMap (cmccabe)
 
+    HADOOP-9660. [WINDOWS] Powershell / cmd parses -Dkey=value from command line
+    as [-Dkey, value] which breaks GenericsOptionParser.
+    (Enis Soztutar via cnauroth)
+
 Release 2.2.0 - 2013-10-13
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/Jets3tFileSystemStore.java

@@ -42,6 +42,7 @@ import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.s3.INode.FileType;
 import org.jets3t.service.S3Service;
 import org.jets3t.service.S3ServiceException;
+import org.jets3t.service.ServiceException;
 import org.jets3t.service.impl.rest.httpclient.RestS3Service;
 import org.jets3t.service.model.S3Bucket;
 import org.jets3t.service.model.S3Object;
@@ -60,8 +61,8 @@ class Jets3tFileSystemStore implements FileSystemStore {
   private static final String FILE_SYSTEM_VERSION_NAME = "fs-version";
   private static final String FILE_SYSTEM_VERSION_VALUE = "1";
   
-  private static final Map<String, String> METADATA =
+  private static final Map<String, Object> METADATA =
-    new HashMap<String, String>();
+    new HashMap<String, Object>();
   
   static {
     METADATA.put(FILE_SYSTEM_NAME, FILE_SYSTEM_VALUE);
@@ -165,7 +166,7 @@ class Jets3tFileSystemStore implements FileSystemStore {
       throws IOException {
     
     try {
-      S3Object object = s3Service.getObject(bucket, key);
+      S3Object object = s3Service.getObject(bucket.getName(), key);
       if (checkMetadata) {
         checkMetadata(object);
       }
@@ -178,6 +179,9 @@ class Jets3tFileSystemStore implements FileSystemStore {
         throw (IOException) e.getCause();
       }
       throw new S3Exception(e);
+    } catch (ServiceException e) {
+      handleServiceException(e);
+      return null;
     }
   }
 
@@ -194,6 +198,9 @@ class Jets3tFileSystemStore implements FileSystemStore {
         throw (IOException) e.getCause();
       }
       throw new S3Exception(e);
+    } catch (ServiceException e) {
+      handleServiceException(e);
+      return null;
     }
   }
 
@@ -276,7 +283,7 @@ class Jets3tFileSystemStore implements FileSystemStore {
       if (!prefix.endsWith(PATH_DELIMITER)) {
         prefix += PATH_DELIMITER;
       }
-      S3Object[] objects = s3Service.listObjects(bucket, prefix, PATH_DELIMITER);
+      S3Object[] objects = s3Service.listObjects(bucket.getName(), prefix, PATH_DELIMITER);
       Set<Path> prefixes = new TreeSet<Path>();
       for (int i = 0; i < objects.length; i++) {
         prefixes.add(keyToPath(objects[i].getKey()));
@@ -298,7 +305,7 @@ class Jets3tFileSystemStore implements FileSystemStore {
       if (!prefix.endsWith(PATH_DELIMITER)) {
         prefix += PATH_DELIMITER;
       }
-      S3Object[] objects = s3Service.listObjects(bucket, prefix, null);
+      S3Object[] objects = s3Service.listObjects(bucket.getName(), prefix, null);
       Set<Path> prefixes = new TreeSet<Path>();
       for (int i = 0; i < objects.length; i++) {
         prefixes.add(keyToPath(objects[i].getKey()));
@@ -385,7 +392,7 @@ class Jets3tFileSystemStore implements FileSystemStore {
   @Override
   public void purge() throws IOException {
     try {
-      S3Object[] objects = s3Service.listObjects(bucket);
+      S3Object[] objects = s3Service.listObjects(bucket.getName());
       for (int i = 0; i < objects.length; i++) {
         s3Service.deleteObject(bucket, objects[i].getKey());
       }
@@ -402,7 +409,7 @@ class Jets3tFileSystemStore implements FileSystemStore {
     StringBuilder sb = new StringBuilder("S3 Filesystem, ");
     sb.append(bucket.getName()).append("\n");
     try {
-      S3Object[] objects = s3Service.listObjects(bucket, PATH_DELIMITER, null);
+      S3Object[] objects = s3Service.listObjects(bucket.getName(), PATH_DELIMITER, null);
       for (int i = 0; i < objects.length; i++) {
         Path path = keyToPath(objects[i].getKey());
         sb.append(path).append("\n");
@@ -424,4 +431,15 @@ class Jets3tFileSystemStore implements FileSystemStore {
     System.out.println(sb);
   }
 
+  private void handleServiceException(ServiceException e) throws IOException {
+      if (e.getCause() instanceof IOException) {
+        throw (IOException) e.getCause();
+      }
+      else {
+        if(LOG.isDebugEnabled()) {
+          LOG.debug("Got ServiceException with Error code: " + e.getErrorCode() + ";and Error message: " + e.getErrorMessage());
+        }
+      }
+    }
+
 }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3/MigrationTool.java

@@ -34,6 +34,7 @@ import org.apache.hadoop.util.Tool;
 import org.apache.hadoop.util.ToolRunner;
 import org.jets3t.service.S3Service;
 import org.jets3t.service.S3ServiceException;
+import org.jets3t.service.ServiceException;
 import org.jets3t.service.impl.rest.httpclient.RestS3Service;
 import org.jets3t.service.model.S3Bucket;
 import org.jets3t.service.model.S3Object;
@@ -177,7 +178,7 @@ public class MigrationTool extends Configured implements Tool {
   
   private S3Object get(String key) {
     try {
-      return s3Service.getObject(bucket, key);
+      return s3Service.getObject(bucket.getName(), key);
     } catch (S3ServiceException e) {
       if ("NoSuchKey".equals(e.getS3ErrorCode())) {
         return null;
@@ -200,7 +201,7 @@ public class MigrationTool extends Configured implements Tool {
     public Set<Path> listAllPaths() throws IOException {
       try {
         String prefix = urlEncode(Path.SEPARATOR);
-        S3Object[] objects = s3Service.listObjects(bucket, prefix, null);
+        S3Object[] objects = s3Service.listObjects(bucket.getName(), prefix, null);
         Set<Path> prefixes = new TreeSet<Path>();
         for (int i = 0; i < objects.length; i++) {
           prefixes.add(keyToPath(objects[i].getKey()));
@@ -237,7 +238,7 @@ public class MigrationTool extends Configured implements Tool {
 
     private InputStream get(String key) throws IOException {
       try {
-        S3Object object = s3Service.getObject(bucket, key);
+        S3Object object = s3Service.getObject(bucket.getName(), key);
         return object.getDataInputStream();
       } catch (S3ServiceException e) {
         if ("NoSuchKey".equals(e.getS3ErrorCode())) {
@@ -247,6 +248,8 @@ public class MigrationTool extends Configured implements Tool {
           throw (IOException) e.getCause();
         }
         throw new S3Exception(e);
+      } catch (ServiceException e) {
+        return null;
       }
     }
     

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/Jets3tNativeFileSystemStore.java

@@ -29,17 +29,21 @@ import java.io.IOException;
 import java.io.InputStream;
 import java.net.URI;
 
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.classification.InterfaceAudience;
 import org.apache.hadoop.classification.InterfaceStability;
 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.fs.s3.S3Credentials;
 import org.apache.hadoop.fs.s3.S3Exception;
-import org.jets3t.service.S3ObjectsChunk;
 import org.jets3t.service.S3Service;
 import org.jets3t.service.S3ServiceException;
+import org.jets3t.service.ServiceException;
+import org.jets3t.service.StorageObjectsChunk;
 import org.jets3t.service.impl.rest.httpclient.RestS3Service;
 import org.jets3t.service.model.S3Bucket;
 import org.jets3t.service.model.S3Object;
+import org.jets3t.service.model.StorageObject;
 import org.jets3t.service.security.AWSCredentials;
 
 @InterfaceAudience.Private
@@ -48,6 +52,8 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
   
   private S3Service s3Service;
   private S3Bucket bucket;
+  public static final Log LOG =
+      LogFactory.getLog(Jets3tNativeFileSystemStore.class);
 
   @Override
   public void initialize(URI uri, Configuration conf) throws IOException {
@@ -59,7 +65,7 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
             s3Credentials.getSecretAccessKey());
       this.s3Service = new RestS3Service(awsCredentials);
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     }
     bucket = new S3Bucket(uri.getHost());
   }
@@ -80,7 +86,7 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
       }
       s3Service.putObject(bucket, object);
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     } finally {
       if (in != null) {
         try {
@@ -101,53 +107,85 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
       object.setContentLength(0);
       s3Service.putObject(bucket, object);
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     }
   }
   
   @Override
   public FileMetadata retrieveMetadata(String key) throws IOException {
     try {
-      S3Object object = s3Service.getObjectDetails(bucket, key);
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Getting metadata for key: " + key + " from bucket:" + bucket.getName());
+      }
+      S3Object object = s3Service.getObject(bucket.getName(), key);
       return new FileMetadata(key, object.getContentLength(),
           object.getLastModifiedDate().getTime());
     } catch (S3ServiceException e) {
       // Following is brittle. Is there a better way?
-      if (e.getMessage().contains("ResponseCode=404")) {
+      if (e.getS3ErrorCode().matches("NoSuchKey")) {
-        return null;
+        return null; //return null if key not found
       }
-      handleServiceException(e);
+      handleS3ServiceException(e);
       return null; //never returned - keep compiler happy
     }
   }
 
+  /**
+   * @param key
+   * The key is the object name that is being retrieved from the S3 bucket
+   * @return
+   * This method returns null if the key is not found
+   * @throws IOException
+   */
+
   @Override
   public InputStream retrieve(String key) throws IOException {
     try {
-      S3Object object = s3Service.getObject(bucket, key);
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Getting key: " + key + " from bucket:" + bucket.getName());
+      }
+      S3Object object = s3Service.getObject(bucket.getName(), key);
       return object.getDataInputStream();
     } catch (S3ServiceException e) {
-      handleServiceException(key, e);
+      handleS3ServiceException(key, e);
       return null; //never returned - keep compiler happy
+    } catch (ServiceException e) {
+      handleServiceException(e);
+      return null; //return null if key not found
     }
   }
 
+  /**
+   *
+   * @param key
+   * The key is the object name that is being retrieved from the S3 bucket
+   * @return
+   * This method returns null if the key is not found
+   * @throws IOException
+   */
+
   @Override
   public InputStream retrieve(String key, long byteRangeStart)
-    throws IOException {
+          throws IOException {
     try {
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Getting key: " + key + " from bucket:" + bucket.getName() + " with byteRangeStart: " + byteRangeStart);
+      }
       S3Object object = s3Service.getObject(bucket, key, null, null, null,
                                             null, byteRangeStart, null);
       return object.getDataInputStream();
     } catch (S3ServiceException e) {
-      handleServiceException(key, e);
+      handleS3ServiceException(key, e);
       return null; //never returned - keep compiler happy
+    } catch (ServiceException e) {
+      handleServiceException(e);
+      return null; //return null if key not found
     }
   }
 
   @Override
   public PartialListing list(String prefix, int maxListingLength)
-    throws IOException {
+          throws IOException {
     return list(prefix, maxListingLength, null, false);
   }
   
@@ -158,6 +196,13 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
     return list(prefix, recurse ? null : PATH_DELIMITER, maxListingLength, priorLastKey);
   }
 
+  /**
+   *
+   * @return
+   * This method returns null if the list could not be populated
+   * due to S3 giving ServiceException
+   * @throws IOException
+   */
 
   private PartialListing list(String prefix, String delimiter,
       int maxListingLength, String priorLastKey) throws IOException {
@@ -165,52 +210,63 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
       if (prefix.length() > 0 && !prefix.endsWith(PATH_DELIMITER)) {
         prefix += PATH_DELIMITER;
       }
-      S3ObjectsChunk chunk = s3Service.listObjectsChunked(bucket.getName(),
+      StorageObjectsChunk chunk = s3Service.listObjectsChunked(bucket.getName(),
           prefix, delimiter, maxListingLength, priorLastKey);
       
       FileMetadata[] fileMetadata =
         new FileMetadata[chunk.getObjects().length];
       for (int i = 0; i < fileMetadata.length; i++) {
-        S3Object object = chunk.getObjects()[i];
+        StorageObject object = chunk.getObjects()[i];
         fileMetadata[i] = new FileMetadata(object.getKey(),
             object.getContentLength(), object.getLastModifiedDate().getTime());
       }
       return new PartialListing(chunk.getPriorLastKey(), fileMetadata,
           chunk.getCommonPrefixes());
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
       return null; //never returned - keep compiler happy
+    } catch (ServiceException e) {
+      handleServiceException(e);
+      return null; //return null if list could not be populated
     }
   }
 
   @Override
   public void delete(String key) throws IOException {
     try {
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Deleting key:" + key + "from bucket" + bucket.getName());
+      }
       s3Service.deleteObject(bucket, key);
     } catch (S3ServiceException e) {
-      handleServiceException(key, e);
+      handleS3ServiceException(key, e);
     }
   }
   
   @Override
   public void copy(String srcKey, String dstKey) throws IOException {
     try {
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Copying srcKey: " + srcKey + "to dstKey: " + dstKey + "in bucket: " + bucket.getName());
+      }
       s3Service.copyObject(bucket.getName(), srcKey, bucket.getName(),
           new S3Object(dstKey), false);
     } catch (S3ServiceException e) {
-      handleServiceException(srcKey, e);
+      handleS3ServiceException(srcKey, e);
+    } catch (ServiceException e) {
+      handleServiceException(e);
     }
   }
 
   @Override
   public void purge(String prefix) throws IOException {
     try {
-      S3Object[] objects = s3Service.listObjects(bucket, prefix, null);
+      S3Object[] objects = s3Service.listObjects(bucket.getName(), prefix, null);
       for (S3Object object : objects) {
         s3Service.deleteObject(bucket, object.getKey());
       }
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     }
   }
 
@@ -219,30 +275,44 @@ class Jets3tNativeFileSystemStore implements NativeFileSystemStore {
     StringBuilder sb = new StringBuilder("S3 Native Filesystem, ");
     sb.append(bucket.getName()).append("\n");
     try {
-      S3Object[] objects = s3Service.listObjects(bucket);
+      S3Object[] objects = s3Service.listObjects(bucket.getName());
       for (S3Object object : objects) {
         sb.append(object.getKey()).append("\n");
       }
     } catch (S3ServiceException e) {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     }
     System.out.println(sb);
   }
 
-  private void handleServiceException(String key, S3ServiceException e) throws IOException {
+  private void handleS3ServiceException(String key, S3ServiceException e) throws IOException {
     if ("NoSuchKey".equals(e.getS3ErrorCode())) {
       throw new FileNotFoundException("Key '" + key + "' does not exist in S3");
     } else {
-      handleServiceException(e);
+      handleS3ServiceException(e);
     }
   }
 
-  private void handleServiceException(S3ServiceException e) throws IOException {
+  private void handleS3ServiceException(S3ServiceException e) throws IOException {
     if (e.getCause() instanceof IOException) {
       throw (IOException) e.getCause();
     }
     else {
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("S3 Error code: " + e.getS3ErrorCode() + "; S3 Error message: " + e.getS3ErrorMessage());
+      }
       throw new S3Exception(e);
     }
   }
+
+  private void handleServiceException(ServiceException e) throws IOException {
+    if (e.getCause() instanceof IOException) {
+      throw (IOException) e.getCause();
+    }
+    else {
+      if(LOG.isDebugEnabled()) {
+        LOG.debug("Got ServiceException with Error code: " + e.getErrorCode() + ";and Error message: " + e.getErrorMessage());
+      }
+    }
+  }
 }

hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/s3native/NativeS3FileSystem.java

@@ -273,7 +273,7 @@ public class NativeS3FileSystem extends FileSystem {
     setConf(conf);
     this.uri = URI.create(uri.getScheme() + "://" + uri.getAuthority());
     this.workingDir =
-      new Path("/user", System.getProperty("user.name")).makeQualified(this);
+      new Path("/user", System.getProperty("user.name")).makeQualified(this.uri, this.getWorkingDirectory());
   }
   
   private static NativeFileSystemStore createDefaultStore(Configuration conf) {
@@ -511,11 +511,11 @@ public class NativeS3FileSystem extends FileSystem {
   
   private FileStatus newFile(FileMetadata meta, Path path) {
     return new FileStatus(meta.getLength(), false, 1, getDefaultBlockSize(),
-        meta.getLastModified(), path.makeQualified(this));
+        meta.getLastModified(), path.makeQualified(this.getUri(), this.getWorkingDirectory()));
   }
   
   private FileStatus newDirectory(Path path) {
-    return new FileStatus(0, true, 1, 0, 0, path.makeQualified(this));
+    return new FileStatus(0, true, 1, 0, 0, path.makeQualified(this.getUri(), this.getWorkingDirectory()));
   }
 
   @Override

hadoop-mapreduce-project/CHANGES.txt

@@ -243,6 +243,9 @@ Release 2.2.1 - UNRELEASED
     MAPREDUCE-5604. TestMRAMWithNonNormalizedCapabilities fails on Windows due to
     exceeding max path length. (cnauroth)
 
+    MAPREDUCE-5451. MR uses LD_LIBRARY_PATH which doesn't mean anything in
+    Windows. (Yingda Chen via cnauroth)
+
 Release 2.2.0 - 2013-10-13
 
   INCOMPATIBLE CHANGES

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/java/org/apache/hadoop/mapreduce/MRJobConfig.java

@@ -575,8 +575,10 @@ public interface MRJobConfig {
   public static final String MAPRED_ADMIN_USER_ENV =
       "mapreduce.admin.user.env";
 
-  public static final String DEFAULT_MAPRED_ADMIN_USER_ENV =
+  public final String DEFAULT_MAPRED_ADMIN_USER_ENV = 
-      "LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native";
+      Shell.WINDOWS ? 
+          "PATH=%PATH%;%HADOOP_COMMON_HOME%\\bin":
+          "LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native";
 
   public static final String WORKDIR = "work";
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-core/src/main/resources/mapred-default.xml

@@ -183,11 +183,16 @@
 
 <property>
   <name>mapreduce.admin.user.env</name>
-  <value>LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native</value>
+  <value></value>
-  <description>Expert: Additional execution environment entries for 
+  <description>
+  Expert: Additional execution environment entries for 
   map and reduce task processes. This is not an additive property.
   You must preserve the original value if you want your map and
   reduce tasks to have access to native libraries (compression, etc). 
+  When this value is empty, the command to set execution 
+  envrionment will be OS dependent: 
+  For linux, use LD_LIBRARY_PATH=$HADOOP_COMMON_HOME/lib/native.
+  For windows, use PATH = %PATH%;%HADOOP_COMMON_HOME%\\bin.
   </description>
 </property>
 

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapred/TestMiniMRChildTask.java

@@ -23,7 +23,9 @@ import static org.junit.Assert.assertTrue;
 import static org.junit.Assert.fail;
 
 import java.io.*;
+import java.util.HashMap;
 import java.util.Iterator;
+import java.util.Map;
 
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
@@ -46,6 +48,7 @@ import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hdfs.MiniDFSCluster;
 import org.apache.hadoop.mapreduce.v2.MiniMRYarnCluster;
 import org.apache.hadoop.util.Shell;
+import org.apache.hadoop.yarn.util.Apps;
 
 /**
  * Class to test mapred task's 
@@ -108,6 +111,29 @@ public class TestMiniMRChildTask {
       }
   }
   
+  /**
+   * Map class which checks if hadoop lib location 
+   * is in the execution path
+   */
+  public static class ExecutionEnvCheckMapClass extends MapReduceBase
+      implements Mapper<LongWritable, Text, Text, IntWritable> {
+      public void map (LongWritable key, Text value, 
+          OutputCollector<Text, IntWritable> output, 
+          Reporter reporter) throws IOException {
+      }
+      public void configure(JobConf job) {
+        String executionEnvPathVariable = System.getenv(Shell.WINDOWS ? "PATH"
+            : "LD_LIBRARY_PATH");
+        String hadoopHome = System.getenv("HADOOP_COMMON_HOME");
+        if (hadoopHome == null) {
+          hadoopHome = "";
+        }
+        String hadoopLibLocation = hadoopHome 
+            + (Shell.WINDOWS ? "\\bin" : "/lib/native");
+        assertTrue(executionEnvPathVariable.contains(hadoopLibLocation));
+      }
+  }
+
   // configure a job
   private void configure(JobConf conf, Path inDir, Path outDir, String input,
                          Class<? extends Mapper> map, 
@@ -153,8 +179,6 @@ public class TestMiniMRChildTask {
                          Path outDir,
                          String input)
   throws IOException, InterruptedException, ClassNotFoundException {
-    configure(conf, inDir, outDir, input, 
-              MapClass.class, IdentityReducer.class);
 
     FileSystem outFs = outDir.getFileSystem(conf);
     
@@ -359,7 +383,8 @@ public class TestMiniMRChildTask {
       Path inDir = new Path("testing/wc/input");
       Path outDir = new Path("testing/wc/output");
       String input = "The input";
-      
+      configure(conf, inDir, outDir, input, 
+          MapClass.class, IdentityReducer.class);
       launchTest(conf, inDir, outDir, input);
       
     } catch(Exception e) {
@@ -369,6 +394,66 @@ public class TestMiniMRChildTask {
     }
   }
 
+  /**
+   * To test OS dependent setting of default execution path for a MapRed task.
+   * Mainly that we can use MRJobConfig.DEFAULT_MAPRED_ADMIN_USER_ENV to set -
+   * for WINDOWS: %HADOOP_COMMON_HOME%\bin is expected to be included in PATH - for
+   * Linux: $HADOOP_COMMON_HOME/lib/native is expected to be included in
+   * LD_LIBRARY_PATH
+   */
+  @Test
+  public void testMapRedExecutionEnv() {
+    // test if the env variable can be set
+    try {
+      // Application environment
+      Map<String, String> environment = new HashMap<String, String>();
+      String setupHadoopHomeCommand = Shell.WINDOWS ? 
+          "HADOOP_COMMON_HOME=C:\\fake\\PATH\\to\\hadoop\\common\\home" :
+          "HADOOP_COMMON_HOME=/fake/path/to/hadoop/common/home";
+      Apps.setEnvFromInputString(environment, setupHadoopHomeCommand);
+            
+      // Add the env variables passed by the admin
+      Apps.setEnvFromInputString(environment, conf.get(
+          MRJobConfig.MAPRED_ADMIN_USER_ENV,
+          MRJobConfig.DEFAULT_MAPRED_ADMIN_USER_ENV));
+      
+      String executionPaths = environment.get(
+          Shell.WINDOWS ? "PATH" : "LD_LIBRARY_PATH");
+      String toFind = Shell.WINDOWS ? 
+          "C:\\fake\\PATH\\to\\hadoop\\common\\home\\bin" : 
+          "/fake/path/to/hadoop/common/home/lib/native";
+      
+      // Ensure execution PATH/LD_LIBRARY_PATH set up pointing to hadoop lib
+      assertTrue("execution path does not include the hadoop lib location "
+          + toFind, executionPaths.contains(toFind));
+    } catch (Exception e) {
+      e.printStackTrace();
+      fail("Exception in testing execution environment for MapReduce task");
+      tearDown();
+    }
+    
+    // now launch a mapreduce job to ensure that the child 
+    // also gets the configured setting for hadoop lib
+    try {
+      
+      JobConf conf = new JobConf(mr.getConfig());      
+      // initialize input, output directories
+      Path inDir = new Path("input");
+      Path outDir = new Path("output");
+      String input = "The input";
+      
+      // set config to use the ExecutionEnvCheckMapClass map class
+      configure(conf, inDir, outDir, input, 
+          ExecutionEnvCheckMapClass.class, IdentityReducer.class);
+      launchTest(conf, inDir, outDir, input);
+                 
+    } catch(Exception e) {
+      e.printStackTrace();
+      fail("Exception in testing propagation of env setting to child task");
+      tearDown();
+    }
+  }
+  
   /**
    * Test to test if the user set env variables reflect in the child
    * processes. Mainly

hadoop-project/pom.xml

@@ -347,6 +347,11 @@
         <artifactId>httpclient</artifactId>
         <version>4.2.5</version>
       </dependency>
+      <dependency>
+        <groupId>org.apache.httpcomponents</groupId>
+        <artifactId>httpcore</artifactId>
+        <version>4.2.5</version>
+      </dependency>
       <dependency>
         <groupId>commons-codec</groupId>
         <artifactId>commons-codec</artifactId>
@@ -554,7 +559,7 @@
       <dependency>
         <groupId>net.java.dev.jets3t</groupId>
         <artifactId>jets3t</artifactId>
-        <version>0.6.1</version>
+        <version>0.9.0</version>
       </dependency>
       <dependency>
         <groupId>org.apache.mina</groupId>