Merge trunk into HA branch.

git-svn-id: https://svn.apache.org/repos/asf/hadoop/common/branches/HDFS-1623@1203781 13f79535-47bb-0310-9956-ffa450edef68

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

@@ -110,6 +110,9 @@ Release 0.23.1 - Unreleased
 
     HADOOP-7801. HADOOP_PREFIX cannot be overriden. (Bruno Mahé via tomwhite)
 
+    HADOOP-7802. Hadoop scripts unconditionally source
+    "$bin"/../libexec/hadoop-config.sh. (Bruno Mahé via tomwhite)
+
   OPTIMIZATIONS
 
   BUG FIXES
@@ -117,6 +120,9 @@ Release 0.23.1 - Unreleased
    HADOOP-7811. TestUserGroupInformation#testGetServerSideGroups test fails in chroot.
    (Jonathan Eagles via mahadev)
 
+   HADOOP-7787. Make source tarball use conventional name.
+   (Bruno Mahé via tomwhite)
+
 Release 0.23.0 - 2011-11-01 
 
   INCOMPATIBLE CHANGES

hadoop-common-project/hadoop-common/src/main/bin/hadoop

@@ -21,7 +21,9 @@ bin=`which $0`
 bin=`dirname ${bin}`
 bin=`cd "$bin"; pwd`
  
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 function print_usage(){
   echo "Usage: hadoop [--config confdir] COMMAND"

hadoop-common-project/hadoop-common/src/main/bin/hadoop-daemon.sh

@@ -39,7 +39,9 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # get arguments
 

hadoop-common-project/hadoop-common/src/main/bin/hadoop-daemons.sh

@@ -29,6 +29,8 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 exec "$bin/slaves.sh" --config $HADOOP_CONF_DIR cd "$HADOOP_PREFIX" \; "$bin/hadoop-daemon.sh" --config $HADOOP_CONF_DIR "$@"

hadoop-common-project/hadoop-common/src/main/bin/rcc

@@ -30,7 +30,9 @@
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
   . "${HADOOP_CONF_DIR}/hadoop-env.sh"

hadoop-common-project/hadoop-common/src/main/bin/slaves.sh

@@ -38,7 +38,9 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 if [ -f "${HADOOP_CONF_DIR}/hadoop-env.sh" ]; then
   . "${HADOOP_CONF_DIR}/hadoop-env.sh"

hadoop-common-project/hadoop-common/src/main/bin/start-all.sh

@@ -23,7 +23,9 @@ echo "This script is Deprecated. Instead use start-dfs.sh and start-mapred.sh"
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # start hdfs daemons if hdfs is present
 if [ -f "${HADOOP_HDFS_HOME}"/bin/start-dfs.sh ]; then

hadoop-common-project/hadoop-common/src/main/bin/stop-all.sh

@@ -23,7 +23,9 @@ echo "This script is Deprecated. Instead use stop-dfs.sh and stop-mapred.sh"
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # stop hdfs daemons if hdfs is present
 if [ -f "${HADOOP_HDFS_HOME}"/bin/stop-dfs.sh ]; then

hadoop-common-project/hadoop-common/src/main/packages/hadoop-create-user.sh

@@ -24,7 +24,9 @@ if [ "$HADOOP_HOME" != "" ]; then
   echo
 fi
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 usage() {
   echo "

hadoop-common-project/hadoop-common/src/main/packages/hadoop-setup-applications.sh

@@ -19,7 +19,9 @@ bin=$(cd -P -- "$(dirname -- "$this")" && pwd -P)
 script="$(basename -- "$this")"
 this="$bin/$script"
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 usage() {
   echo "

hadoop-common-project/hadoop-common/src/main/packages/hadoop-setup-conf.sh

@@ -504,7 +504,10 @@ if [ "${AUTOSETUP}" == "1" -o "${AUTOSETUP}" == "y" ]; then
   fi
   chmod 755 -R ${HADOOP_PREFIX}/sbin/*hadoop*
   chmod 755 -R ${HADOOP_PREFIX}/bin/hadoop
-  chmod 755 -R ${HADOOP_PREFIX}/libexec/hadoop-config.sh
+
+  HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-${HADOOP_PREFIX}/libexec}
+  chmod 755 -R ${HADOOP_LIBEXEC_DIR}/hadoop-config.sh
+
   mkdir -p /home/${HADOOP_MR_USER}
   chown ${HADOOP_MR_USER}:${HADOOP_GROUP} /home/${HADOOP_MR_USER}
   HDFS_DIR=`echo ${HADOOP_HDFS_DIR} | sed -e 's/,/ /g'`

hadoop-common-project/hadoop-common/src/main/packages/hadoop-setup-hdfs.sh

@@ -18,7 +18,9 @@
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 usage() {
   echo "

hadoop-common-project/hadoop-common/src/main/packages/hadoop-setup-single-node.sh

@@ -25,7 +25,9 @@ if [ "$HADOOP_HOME" != "" ]; then
   echo
 fi
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 usage() {
   echo "

hadoop-common-project/hadoop-common/src/main/packages/hadoop-validate-setup.sh

@@ -31,7 +31,9 @@
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 usage() {
   echo "

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/JarFinder.java

@@ -0,0 +1,146 @@
+/**
+ * Licensed 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. See accompanying LICENSE file.
+ */
+package org.apache.hadoop.util;
+
+import com.google.common.base.Preconditions;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStream;
+import java.net.URL;
+import java.net.URLDecoder;
+import java.text.MessageFormat;
+import java.util.Enumeration;
+import java.util.jar.JarOutputStream;
+import java.util.jar.Manifest;
+import java.util.zip.ZipEntry;
+import java.util.zip.ZipOutputStream;
+
+/**
+ * Finds the Jar for a class. If the class is in a directory in the
+ * classpath, it creates a Jar on the fly with the contents of the directory
+ * and returns the path to that Jar. If a Jar is created, it is created in
+ * the system temporary directory.
+ */
+public class JarFinder {
+
+  private static void zipDir(File dir, String relativePath, ZipOutputStream zos)
+    throws IOException {
+    Preconditions.checkNotNull(relativePath, "relativePath");
+    Preconditions.checkNotNull(zos, "zos");
+    zipDir(dir, relativePath, zos, true);
+    zos.close();
+  }
+
+  private static void zipDir(File dir, String relativePath, ZipOutputStream zos,
+                             boolean start) throws IOException {
+    String[] dirList = dir.list();
+    for (String aDirList : dirList) {
+      File f = new File(dir, aDirList);
+      if (!f.isHidden()) {
+        if (f.isDirectory()) {
+          if (!start) {
+            ZipEntry dirEntry = new ZipEntry(relativePath + f.getName() + "/");
+            zos.putNextEntry(dirEntry);
+            zos.closeEntry();
+          }
+          String filePath = f.getPath();
+          File file = new File(filePath);
+          zipDir(file, relativePath + f.getName() + "/", zos, false);
+        }
+        else {
+          ZipEntry anEntry = new ZipEntry(relativePath + f.getName());
+          zos.putNextEntry(anEntry);
+          InputStream is = new FileInputStream(f);
+          byte[] arr = new byte[4096];
+          int read = is.read(arr);
+          while (read > -1) {
+            zos.write(arr, 0, read);
+            read = is.read(arr);
+          }
+          is.close();
+          zos.closeEntry();
+        }
+      }
+    }
+  }
+
+  private static void createJar(File dir, File jarFile) throws IOException {
+    Preconditions.checkNotNull(dir, "dir");
+    Preconditions.checkNotNull(jarFile, "jarFile");
+    File jarDir = jarFile.getParentFile();
+    if (!jarDir.exists()) {
+      if (!jarDir.mkdirs()) {
+        throw new IOException(MessageFormat.format("could not create dir [{0}]",
+                                                   jarDir));
+      }
+    }
+    JarOutputStream zos = new JarOutputStream(new FileOutputStream(jarFile),
+                                              new Manifest());
+    zipDir(dir, "", zos);
+  }
+
+  /**
+   * Returns the full path to the Jar containing the class. It always return a
+   * JAR.
+   *
+   * @param klass class.
+   *
+   * @return path to the Jar containing the class.
+   */
+  public static String getJar(Class klass) {
+    Preconditions.checkNotNull(klass, "klass");
+    ClassLoader loader = klass.getClassLoader();
+    if (loader != null) {
+      String class_file = klass.getName().replaceAll("\\.", "/") + ".class";
+      try {
+        for (Enumeration itr = loader.getResources(class_file);
+             itr.hasMoreElements(); ) {
+          URL url = (URL) itr.nextElement();
+          String path = url.getPath();
+          if (path.startsWith("file:")) {
+            path = path.substring("file:".length());
+          }
+          path = URLDecoder.decode(path, "UTF-8");
+          if ("jar".equals(url.getProtocol())) {
+            path = URLDecoder.decode(path, "UTF-8");
+            return path.replaceAll("!.*$", "");
+          }
+          else if ("file".equals(url.getProtocol())) {
+            String klassName = klass.getName();
+            klassName = klassName.replace(".", "/") + ".class";
+            path = path.substring(0, path.length() - klassName.length());
+            File baseDir = new File(path);
+            File testDir = new File(System.getProperty("test.build.dir", "target/test-dir"));
+            testDir = testDir.getAbsoluteFile();
+            if (!testDir.exists()) {
+              testDir.mkdirs();
+            }
+            File tempJar = File.createTempFile("hadoop-", "", testDir);
+            tempJar = new File(tempJar.getAbsolutePath() + ".jar");
+            createJar(baseDir, tempJar);
+            return tempJar.getAbsolutePath();
+          }
+        }
+      }
+      catch (IOException e) {
+        throw new RuntimeException(e);
+      }
+    }
+    return null;
+  }
+
+}

hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestJarFinder.java

@@ -0,0 +1,42 @@
+/**
+ * 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.util;
+
+import org.apache.commons.logging.LogFactory;
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.io.File;
+
+public class TestJarFinder {
+
+  @Test
+  public void testAppend() throws Exception {
+
+    //picking a class that is for sure in a JAR in the classpath
+    String jar = JarFinder.getJar(LogFactory.class);
+    Assert.assertTrue(new File(jar).exists());
+
+    //picking a class that is for sure in a directory in the classpath
+    //in this case the JAR is created on the fly
+    jar = JarFinder.getJar(TestJarFinder.class);
+    Assert.assertTrue(new File(jar).exists());
+  }
+
+}

hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt

@@ -107,6 +107,15 @@ Release 0.23.1 - UNRELEASED
   NEW FEATURES
 
   IMPROVEMENTS
+    HDFS-2560. Refactor BPOfferService to be a static inner class (todd)
+
+    HDFS-2544. Hadoop scripts unconditionally source
+    "$bin"/../libexec/hadoop-config.sh. (Bruno Mahé via tomwhite)
+
+    HDFS-2543. HADOOP_PREFIX cannot be overridden. (Bruno Mahé via tomwhite)
+
+    HDFS-2562. Refactor DN configuration variables out of DataNode class
+    (todd)
 
   OPTIMIZATIONS
 

hadoop-hdfs-project/hadoop-hdfs/src/contrib/fuse-dfs/src/fuse_dfs_wrapper.sh

@@ -16,9 +16,7 @@
 # limitations under the License.
 #
 
-if [ "$HADOOP_PREFIX" = "" ]; then
-export HADOOP_PREFIX=/usr/local/share/hadoop
-fi
+export HADOOP_PREFIX=${HADOOP_PREFIX:-/usr/local/share/hadoop}
 
 if [ "$OS_ARCH" = "" ]; then
 export OS_ARCH=amd64

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/distribute-exclude.sh

@@ -36,7 +36,9 @@
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin/../libexec/hdfs-config.sh"
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 if [ "$1" = '' ] ; then
   "Error: please specify local exclude file as a first argument"

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs

@@ -19,7 +19,9 @@ bin=`which $0`
 bin=`dirname ${bin}`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 function print_usage(){
   echo "Usage: hdfs [--config confdir] COMMAND"

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/hdfs-config.sh

@@ -24,8 +24,10 @@ bin=`cd "$bin"; pwd`
 
 export HADOOP_PREFIX="${HADOOP_PREFIX:-$bin/..}"
 
-if [ -e "$bin/../libexec/hadoop-config.sh" ]; then
-  . $bin/../libexec/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+if [ -e "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh" ]; then
+  . ${HADOOP_LIBEXEC_DIR}/hadoop-config.sh
 elif [ -e "${HADOOP_COMMON_HOME}/libexec/hadoop-config.sh" ]; then
   . "$HADOOP_COMMON_HOME"/libexec/hadoop-config.sh
 elif [ -e "${HADOOP_HOME}/libexec/hadoop-config.sh" ]; then

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/refresh-namenodes.sh

@@ -23,7 +23,9 @@
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin/../libexec/hdfs-config.sh"
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 namenodes=$("$HADOOP_PREFIX/bin/hdfs" getconf -nnRpcAddresses)
 if [ "$?" != '0' ] ; then errorFlag='1' ; 

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/start-balancer.sh

@@ -18,7 +18,9 @@
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 # Start balancer daemon.
 

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/start-dfs.sh

@@ -25,7 +25,9 @@ usage="Usage: start-dfs.sh [-upgrade|-rollback]"
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 # get arguments
 if [ $# -ge 1 ]; then

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/start-secure-dns.sh

@@ -22,7 +22,9 @@ usage="Usage (run as root in order to start secure datanodes): start-secure-dns.
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 if [ "$EUID" -eq 0 ] && [ -n "$HADOOP_SECURE_DN_USER" ]; then
   "$HADOOP_PREFIX"/sbin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs start datanode $dataStartOpt

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/stop-balancer.sh

@@ -18,7 +18,9 @@
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 # Stop balancer daemon.
 # Run this on the machine where the balancer is running

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/stop-dfs.sh

@@ -18,7 +18,9 @@
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 #---------------------------------------------------------
 # namenodes

hadoop-hdfs-project/hadoop-hdfs/src/main/bin/stop-secure-dns.sh

@@ -22,7 +22,9 @@ usage="Usage (run as root in order to stop secure datanodes): stop-secure-dns.sh
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/../libexec/hdfs-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hdfs-config.sh
 
 if [ "$EUID" -eq 0 ] && [ -n "$HADOOP_SECURE_DN_USER" ]; then
   "$HADOOP_PREFIX"/sbin/hadoop-daemons.sh --config $HADOOP_CONF_DIR --script "$bin"/hdfs stop datanode

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/security/token/block/BlockPoolTokenSecretManager.java

@@ -55,6 +55,10 @@ public class BlockPoolTokenSecretManager extends
     }
     return secretMgr;
   }
+  
+  public synchronized boolean isBlockPoolRegistered(String bpid) {
+    return map.containsKey(bpid);
+  }
 
   /** Return an empty BlockTokenIdentifer */
   @Override

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockReceiver.java

@@ -185,8 +185,8 @@ class BlockReceiver implements Closeable {
               " while receiving block " + block + " from " + inAddr);
         }
       }
-      this.dropCacheBehindWrites = datanode.shouldDropCacheBehindWrites();
-      this.syncBehindWrites = datanode.shouldSyncBehindWrites();
+      this.dropCacheBehindWrites = datanode.getDnConf().dropCacheBehindWrites;
+      this.syncBehindWrites = datanode.getDnConf().syncBehindWrites;
       
       final boolean isCreate = isDatanode || isTransfer 
           || stage == BlockConstructionStage.PIPELINE_SETUP_CREATE;
@@ -249,7 +249,7 @@ class BlockReceiver implements Closeable {
     try {
       if (checksumOut != null) {
         checksumOut.flush();
-        if (datanode.syncOnClose && (cout instanceof FileOutputStream)) {
+        if (datanode.getDnConf().syncOnClose && (cout instanceof FileOutputStream)) {
           ((FileOutputStream)cout).getChannel().force(true);
         }
         checksumOut.close();
@@ -265,7 +265,7 @@ class BlockReceiver implements Closeable {
     try {
       if (out != null) {
         out.flush();
-        if (datanode.syncOnClose && (out instanceof FileOutputStream)) {
+        if (datanode.getDnConf().syncOnClose && (out instanceof FileOutputStream)) {
           ((FileOutputStream)out).getChannel().force(true);
         }
         out.close();
@@ -435,7 +435,7 @@ class BlockReceiver implements Closeable {
        * calculation in DFSClient to make the guess accurate.
        */
       int chunkSize = bytesPerChecksum + checksumSize;
-      int chunksPerPacket = (datanode.writePacketSize - PacketHeader.PKT_HEADER_LEN
+      int chunksPerPacket = (datanode.getDnConf().writePacketSize - PacketHeader.PKT_HEADER_LEN
                              + chunkSize - 1)/chunkSize;
       buf = ByteBuffer.allocate(PacketHeader.PKT_HEADER_LEN +
                                 Math.max(chunksPerPacket, 1) * chunkSize);

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/BlockSender.java

@@ -185,8 +185,8 @@ class BlockSender implements java.io.Closeable {
       this.corruptChecksumOk = corruptChecksumOk;
       this.verifyChecksum = verifyChecksum;
       this.clientTraceFmt = clientTraceFmt;
-      this.readaheadLength = datanode.getReadaheadLength();
-      this.shouldDropCacheBehindRead = datanode.shouldDropCacheBehindReads();
+      this.readaheadLength = datanode.getDnConf().readaheadLength;
+      this.shouldDropCacheBehindRead = datanode.getDnConf().dropCacheBehindReads;
       
       synchronized(datanode.data) { 
         this.replica = getReplica(block, datanode);
@@ -215,7 +215,7 @@ class BlockSender implements java.io.Closeable {
 
       // transferToFully() fails on 32 bit platforms for block sizes >= 2GB,
       // use normal transfer in those cases
-      this.transferToAllowed = datanode.transferToAllowed &&
+      this.transferToAllowed = datanode.getDnConf().transferToAllowed &&
         (!is32Bit || length <= Integer.MAX_VALUE);
 
       DataChecksum csum;

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DNConf.java

@@ -0,0 +1,115 @@
+/**
+ * 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.hdfs.server.datanode;
+
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INITIAL_DELAY_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SYNCONCLOSE_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SYNCONCLOSE_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_TRANSFERTO_ALLOWED_KEY;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_DEFAULT;
+import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.hdfs.DFSConfigKeys;
+import org.apache.hadoop.hdfs.server.common.HdfsServerConstants;
+
+/**
+ * Simple class encapsulating all of the configuration that the DataNode
+ * loads at startup time.
+ */
+class DNConf {
+  final int socketTimeout;
+  final int socketWriteTimeout;
+  final int socketKeepaliveTimeout;
+  
+  final boolean transferToAllowed;
+  final boolean dropCacheBehindWrites;
+  final boolean syncBehindWrites;
+  final boolean dropCacheBehindReads;
+  final boolean syncOnClose;
+  
+
+  final long readaheadLength;
+  final long heartBeatInterval;
+  final long blockReportInterval;
+  final long deleteReportInterval;
+  final long initialBlockReportDelay;
+  final int writePacketSize;
+
+  public DNConf(Configuration conf) {
+    socketTimeout = conf.getInt(DFS_CLIENT_SOCKET_TIMEOUT_KEY,
+        HdfsServerConstants.READ_TIMEOUT);
+    socketWriteTimeout = conf.getInt(DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY,
+        HdfsServerConstants.WRITE_TIMEOUT);
+    socketKeepaliveTimeout = conf.getInt(
+        DFSConfigKeys.DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_KEY,
+        DFSConfigKeys.DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_DEFAULT);
+    
+    /* Based on results on different platforms, we might need set the default 
+     * to false on some of them. */
+    transferToAllowed = conf.getBoolean(
+        DFS_DATANODE_TRANSFERTO_ALLOWED_KEY,
+        DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT);
+
+    writePacketSize = conf.getInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY, 
+        DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT);
+    
+    readaheadLength = conf.getLong(
+        DFSConfigKeys.DFS_DATANODE_READAHEAD_BYTES_KEY,
+        DFSConfigKeys.DFS_DATANODE_READAHEAD_BYTES_DEFAULT);
+    dropCacheBehindWrites = conf.getBoolean(
+        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_WRITES_KEY,
+        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_WRITES_DEFAULT);
+    syncBehindWrites = conf.getBoolean(
+        DFSConfigKeys.DFS_DATANODE_SYNC_BEHIND_WRITES_KEY,
+        DFSConfigKeys.DFS_DATANODE_SYNC_BEHIND_WRITES_DEFAULT);
+    dropCacheBehindReads = conf.getBoolean(
+        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_READS_KEY,
+        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_READS_DEFAULT);
+    
+    this.blockReportInterval = conf.getLong(DFS_BLOCKREPORT_INTERVAL_MSEC_KEY,
+    DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT);
+    
+    long initBRDelay = conf.getLong(
+        DFS_BLOCKREPORT_INITIAL_DELAY_KEY,
+        DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT) * 1000L;
+    if (initBRDelay >= blockReportInterval) {
+      initBRDelay = 0;
+      DataNode.LOG.info("dfs.blockreport.initialDelay is greater than " +
+          "dfs.blockreport.intervalMsec." + " Setting initial delay to 0 msec:");
+    }
+    initialBlockReportDelay = initBRDelay;
+    
+    heartBeatInterval = conf.getLong(DFS_HEARTBEAT_INTERVAL_KEY,
+        DFS_HEARTBEAT_INTERVAL_DEFAULT) * 1000L;
+    
+    this.deleteReportInterval = 100 * heartBeatInterval;
+    // do we need to sync block file contents to disk when blockfile is closed?
+    this.syncOnClose = conf.getBoolean(DFS_DATANODE_SYNCONCLOSE_KEY, 
+        DFS_DATANODE_SYNCONCLOSE_DEFAULT);
+
+  }
+}

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataNode.java

@@ -19,15 +19,8 @@ package org.apache.hadoop.hdfs.server.datanode;
 
 
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_ADMIN;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INITIAL_DELAY_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_BLOCKREPORT_INTERVAL_MSEC_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_HTTPS_NEED_AUTH_DEFAULT;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_HTTPS_NEED_AUTH_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_SOCKET_TIMEOUT_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_CLIENT_WRITE_PACKET_SIZE_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_ADDRESS_DEFAULT;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_ADDRESS_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_DATA_DIR_KEY;
@@ -51,17 +44,10 @@ import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOUR
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SCAN_PERIOD_HOURS_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SIMULATEDDATASTORAGE_DEFAULT;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SIMULATEDDATASTORAGE_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_STARTUP_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_STORAGEID_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SYNCONCLOSE_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_SYNCONCLOSE_KEY;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_TRANSFERTO_ALLOWED_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_DATANODE_USER_NAME_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_FEDERATION_NAMESERVICES;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_DEFAULT;
-import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_HEARTBEAT_INTERVAL_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_WEBHDFS_ENABLED_KEY;
 import static org.apache.hadoop.hdfs.DFSConfigKeys.DFS_WEBHDFS_ENABLED_DEFAULT;
 import static org.apache.hadoop.hdfs.server.common.Util.now;
@@ -104,7 +90,6 @@ import org.apache.hadoop.fs.FileSystem;
 import org.apache.hadoop.fs.LocalFileSystem;
 import org.apache.hadoop.fs.Path;
 import org.apache.hadoop.fs.permission.FsPermission;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.DFSUtil;
 import org.apache.hadoop.hdfs.HDFSPolicyProvider;
 import org.apache.hadoop.hdfs.HdfsConfiguration;
@@ -136,6 +121,7 @@ import org.apache.hadoop.hdfs.server.common.HdfsServerConstants.StartupOption;
 import org.apache.hadoop.hdfs.server.common.IncorrectVersionException;
 import org.apache.hadoop.hdfs.server.common.JspHelper;
 import org.apache.hadoop.hdfs.server.common.Storage;
+import org.apache.hadoop.hdfs.server.common.StorageInfo;
 import org.apache.hadoop.hdfs.server.common.Util;
 import org.apache.hadoop.hdfs.server.datanode.FSDataset.VolumeInfo;
 import org.apache.hadoop.hdfs.server.datanode.SecureDataNodeStarter.SecureResources;
@@ -275,7 +261,7 @@ public class DataNode extends Configured
   
       List<InetSocketAddress> isas = DFSUtil.getNNServiceRpcAddresses(conf);
       for(InetSocketAddress isa : isas) {
-        BPOfferService bpos = new BPOfferService(isa);
+        BPOfferService bpos = new BPOfferService(isa, DataNode.this);
         nameNodeThreads.put(bpos.getNNSocketAddress(), bpos);
       }
     }
@@ -373,19 +359,19 @@ public class DataNode extends Configured
           }
 
           for (InetSocketAddress nnaddr : toStart) {
-            BPOfferService bpos = new BPOfferService(nnaddr);
+            BPOfferService bpos = new BPOfferService(nnaddr, DataNode.this);
             nameNodeThreads.put(bpos.getNNSocketAddress(), bpos);
           }
-
-          for (BPOfferService bpos : toShutdown) {
-            remove(bpos);
-          }
         }
 
         for (BPOfferService bpos : toShutdown) {
           bpos.stop();
           bpos.join();
         }
+        
+        // stoping the BPOSes causes them to call remove() on their own when they
+        // clean up.
+        
         // Now start the threads that are not already running.
         startAll();
       }
@@ -401,12 +387,7 @@ public class DataNode extends Configured
   AtomicInteger xmitsInProgress = new AtomicInteger();
   Daemon dataXceiverServer = null;
   ThreadGroup threadGroup = null;
-  long blockReportInterval;
-  boolean resetBlockReportTime = true;
-  long deleteReportInterval;
-  long lastDeletedReport = 0;
-  long initialBlockReportDelay = DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT * 1000L;
-  long heartBeatInterval;
+  private DNConf dnConf;
   private boolean heartbeatsDisabledForTests = false;
   private DataStorage storage = null;
   private HttpServer infoServer = null;
@@ -416,18 +397,9 @@ public class DataNode extends Configured
   private volatile String hostName; // Host name of this datanode
   
   private static String dnThreadName;
-  int socketTimeout;
-  int socketWriteTimeout = 0;  
-  boolean transferToAllowed = true;
-  private boolean dropCacheBehindWrites = false;
-  private boolean syncBehindWrites = false;
-  private boolean dropCacheBehindReads = false;
-  private long readaheadLength = 0;
-
-  int writePacketSize = 0;
+
   boolean isBlockTokenEnabled;
   BlockPoolTokenSecretManager blockPoolTokenSecretManager;
-  boolean syncOnClose;
   
   public DataBlockScanner blockScanner = null;
   private DirectoryScanner directoryScanner = null;
@@ -495,51 +467,6 @@ public class DataNode extends Configured
     return name;
   }
 
-  private void initConfig(Configuration conf) {
-    this.socketTimeout =  conf.getInt(DFS_CLIENT_SOCKET_TIMEOUT_KEY,
-                                      HdfsServerConstants.READ_TIMEOUT);
-    this.socketWriteTimeout = conf.getInt(DFS_DATANODE_SOCKET_WRITE_TIMEOUT_KEY,
-                                          HdfsServerConstants.WRITE_TIMEOUT);
-    /* Based on results on different platforms, we might need set the default 
-     * to false on some of them. */
-    this.transferToAllowed = conf.getBoolean(
-        DFS_DATANODE_TRANSFERTO_ALLOWED_KEY,
-        DFS_DATANODE_TRANSFERTO_ALLOWED_DEFAULT);
-    this.writePacketSize = conf.getInt(DFS_CLIENT_WRITE_PACKET_SIZE_KEY, 
-                                       DFS_CLIENT_WRITE_PACKET_SIZE_DEFAULT);
-
-    this.readaheadLength = conf.getLong(
-        DFSConfigKeys.DFS_DATANODE_READAHEAD_BYTES_KEY,
-        DFSConfigKeys.DFS_DATANODE_READAHEAD_BYTES_DEFAULT);
-    this.dropCacheBehindWrites = conf.getBoolean(
-        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_WRITES_KEY,
-        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_WRITES_DEFAULT);
-    this.syncBehindWrites = conf.getBoolean(
-        DFSConfigKeys.DFS_DATANODE_SYNC_BEHIND_WRITES_KEY,
-        DFSConfigKeys.DFS_DATANODE_SYNC_BEHIND_WRITES_DEFAULT);
-    this.dropCacheBehindReads = conf.getBoolean(
-        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_READS_KEY,
-        DFSConfigKeys.DFS_DATANODE_DROP_CACHE_BEHIND_READS_DEFAULT);
-
-    this.blockReportInterval = conf.getLong(DFS_BLOCKREPORT_INTERVAL_MSEC_KEY,
-        DFS_BLOCKREPORT_INTERVAL_MSEC_DEFAULT);
-    this.initialBlockReportDelay = conf.getLong(
-        DFS_BLOCKREPORT_INITIAL_DELAY_KEY,
-        DFS_BLOCKREPORT_INITIAL_DELAY_DEFAULT) * 1000L;
-    if (this.initialBlockReportDelay >= blockReportInterval) {
-      this.initialBlockReportDelay = 0;
-      LOG.info("dfs.blockreport.initialDelay is greater than " +
-        "dfs.blockreport.intervalMsec." + " Setting initial delay to 0 msec:");
-    }
-    this.heartBeatInterval = conf.getLong(DFS_HEARTBEAT_INTERVAL_KEY,
-        DFS_HEARTBEAT_INTERVAL_DEFAULT) * 1000L;
-
-    this.deleteReportInterval = 100 * heartBeatInterval;
-    // do we need to sync block file contents to disk when blockfile is closed?
-    this.syncOnClose = conf.getBoolean(DFS_DATANODE_SYNCONCLOSE_KEY, 
-                                       DFS_DATANODE_SYNCONCLOSE_DEFAULT);
-  }
-  
   private void startInfoServer(Configuration conf) throws IOException {
     // create a servlet to serve full-file content
     InetSocketAddress infoSocAddr = DataNode.getInfoAddr(conf);
@@ -653,6 +580,7 @@ public class DataNode extends Configured
       return;
     }
     String reason = null;
+    assert data != null;
     if (conf.getInt(DFS_DATANODE_SCAN_PERIOD_HOURS_KEY,
                     DFS_DATANODE_SCAN_PERIOD_HOURS_DEFAULT) < 0) {
       reason = "verification is turned off by configuration";
@@ -709,7 +637,7 @@ public class DataNode extends Configured
     // find free port or use privileged port provided
     ServerSocket ss;
     if(secureResources == null) {
-      ss = (socketWriteTimeout > 0) ? 
+      ss = (dnConf.socketWriteTimeout > 0) ? 
           ServerSocketChannel.open().socket() : new ServerSocket();
           Server.bind(ss, socAddr, 0);
     } else {
@@ -774,11 +702,15 @@ public class DataNode extends Configured
    * </ul>
    */
   @InterfaceAudience.Private
-  class BPOfferService implements Runnable {
+  static class BPOfferService implements Runnable {
     final InetSocketAddress nnAddr;
     DatanodeRegistration bpRegistration;
     NamespaceInfo bpNSInfo;
     long lastBlockReport = 0;
+    long lastDeletedReport = 0;
+
+    boolean resetBlockReportTime = true;
+
     private Thread bpThread;
     private DatanodeProtocol bpNamenode;
     private String blockPoolId;
@@ -788,14 +720,15 @@ public class DataNode extends Configured
       = new LinkedList<ReceivedDeletedBlockInfo>();
     private volatile int pendingReceivedRequests = 0;
     private volatile boolean shouldServiceRun = true;
-    private boolean isBlockTokenInitialized = false;
     UpgradeManagerDatanode upgradeManager = null;
+    private final DataNode dn;
+    private final DNConf dnConf;
 
-    BPOfferService(InetSocketAddress isa) {
-      this.bpRegistration = new DatanodeRegistration(getMachineName());
-      bpRegistration.setInfoPort(infoServer.getPort());
-      bpRegistration.setIpcPort(getIpcPort());
-      this.nnAddr = isa;
+    BPOfferService(InetSocketAddress nnAddr, DataNode dn) {
+      this.dn = dn;
+      this.bpRegistration = dn.createRegistration();
+      this.nnAddr = nnAddr;
+      this.dnConf = dn.getDnConf();
     }
 
     /**
@@ -822,7 +755,6 @@ public class DataNode extends Configured
     void setNamespaceInfo(NamespaceInfo nsinfo) {
       bpNSInfo = nsinfo;
       this.blockPoolId = nsinfo.getBlockPoolID();
-      blockPoolManager.addBlockPool(this);
     }
 
     void setNameNode(DatanodeProtocol dnProtocol) {
@@ -831,7 +763,7 @@ public class DataNode extends Configured
 
     private NamespaceInfo handshake() throws IOException {
       NamespaceInfo nsInfo = new NamespaceInfo();
-      while (shouldRun && shouldServiceRun) {
+      while (dn.shouldRun && shouldServiceRun) {
         try {
           nsInfo = bpNamenode.versionRequest();
           // verify build version
@@ -867,7 +799,7 @@ public class DataNode extends Configured
       return nsInfo;
     }
 
-    void setupBP(Configuration conf, AbstractList<File> dataDirs) 
+    void setupBP(Configuration conf) 
     throws IOException {
       // get NN proxy
       DatanodeProtocol dnp = 
@@ -878,52 +810,19 @@ public class DataNode extends Configured
       // handshake with NN
       NamespaceInfo nsInfo = handshake();
       setNamespaceInfo(nsInfo);
-      synchronized(DataNode.this) {
-        // we do not allow namenode from different cluster to register
-        if(clusterId != null && !clusterId.equals(nsInfo.clusterID)) {
-          throw new IOException(
-              "cannot register with the namenode because clusterid do not match:"
-              + " nn=" + nsInfo.getBlockPoolID() + "; nn cid=" + nsInfo.clusterID + 
-              ";dn cid=" + clusterId);
-        }
-
-        setupBPStorage();
-
-        setClusterId(nsInfo.clusterID);
-      }
-    
-      initPeriodicScanners(conf);
-    }
-    
-    void setupBPStorage() throws IOException {
-      StartupOption startOpt = getStartupOption(conf);
-      assert startOpt != null : "Startup option must be set.";
-
-      boolean simulatedFSDataset = conf.getBoolean(
-          DFS_DATANODE_SIMULATEDDATASTORAGE_KEY,
-          DFS_DATANODE_SIMULATEDDATASTORAGE_DEFAULT);
+      dn.initBlockPool(this, nsInfo);
       
-      if (simulatedFSDataset) {
-        initFsDataSet(conf, dataDirs);
-        bpRegistration.setStorageID(getStorageId()); //same as DN
+      bpRegistration.setStorageID(dn.getStorageId());
+      StorageInfo storageInfo = dn.storage.getBPStorage(blockPoolId);
+      if (storageInfo == null) {
+        // it's null in the case of SimulatedDataSet
         bpRegistration.storageInfo.layoutVersion = HdfsConstants.LAYOUT_VERSION;
-        bpRegistration.storageInfo.namespaceID = bpNSInfo.namespaceID;
-        bpRegistration.storageInfo.clusterID = bpNSInfo.clusterID;
+        bpRegistration.setStorageInfo(nsInfo);
       } else {
-        // read storage info, lock data dirs and transition fs state if necessary          
-        storage.recoverTransitionRead(DataNode.this, blockPoolId, bpNSInfo,
-            dataDirs, startOpt);
-        LOG.info("setting up storage: nsid=" + storage.namespaceID + ";bpid="
-            + blockPoolId + ";lv=" + storage.layoutVersion + ";nsInfo="
-            + bpNSInfo);
-
-        bpRegistration.setStorageID(getStorageId());
-        bpRegistration.setStorageInfo(storage.getBPStorage(blockPoolId));
-        initFsDataSet(conf, dataDirs);
+        bpRegistration.setStorageInfo(storageInfo);
       }
-      data.addBlockPool(blockPoolId, conf);
     }
-
+    
     /**
      * This methods  arranges for the data node to send the block report at 
      * the next heartbeat.
@@ -931,9 +830,9 @@ public class DataNode extends Configured
     void scheduleBlockReport(long delay) {
       if (delay > 0) { // send BR after random delay
         lastBlockReport = System.currentTimeMillis()
-        - ( blockReportInterval - DFSUtil.getRandom().nextInt((int)(delay)));
+        - ( dnConf.blockReportInterval - DFSUtil.getRandom().nextInt((int)(delay)));
       } else { // send at next heartbeat
-        lastBlockReport = lastHeartbeat - blockReportInterval;
+        lastBlockReport = lastHeartbeat - dnConf.blockReportInterval;
       }
       resetBlockReportTime = true; // reset future BRs for randomness
     }
@@ -1038,11 +937,11 @@ public class DataNode extends Configured
       // send block report if timer has expired.
       DatanodeCommand cmd = null;
       long startTime = now();
-      if (startTime - lastBlockReport > blockReportInterval) {
+      if (startTime - lastBlockReport > dnConf.blockReportInterval) {
 
         // Create block report
         long brCreateStartTime = now();
-        BlockListAsLongs bReport = data.getBlockReport(blockPoolId);
+        BlockListAsLongs bReport = dn.data.getBlockReport(blockPoolId);
 
         // Send block report
         long brSendStartTime = now();
@@ -1052,7 +951,7 @@ public class DataNode extends Configured
         // Log the block report processing stats from Datanode perspective
         long brSendCost = now() - brSendStartTime;
         long brCreateCost = brSendStartTime - brCreateStartTime;
-        metrics.addBlockReport(brSendCost);
+        dn.metrics.addBlockReport(brSendCost);
         LOG.info("BlockReport of " + bReport.getNumberOfBlocks()
             + " blocks took " + brCreateCost + " msec to generate and "
             + brSendCost + " msecs for RPC and NN processing");
@@ -1060,7 +959,7 @@ public class DataNode extends Configured
         // If we have sent the first block report, then wait a random
         // time before we start the periodic block reports.
         if (resetBlockReportTime) {
-          lastBlockReport = startTime - DFSUtil.getRandom().nextInt((int)(blockReportInterval));
+          lastBlockReport = startTime - DFSUtil.getRandom().nextInt((int)(dnConf.blockReportInterval));
           resetBlockReportTime = false;
         } else {
           /* say the last block report was at 8:20:14. The current report
@@ -1070,7 +969,7 @@ public class DataNode extends Configured
            *   2) unexpected like 11:35:43, next report should be at 12:20:14
            */
           lastBlockReport += (now() - lastBlockReport) /
-          blockReportInterval * blockReportInterval;
+          dnConf.blockReportInterval * dnConf.blockReportInterval;
         }
         LOG.info("sent block report, processed command:" + cmd);
       }
@@ -1080,12 +979,12 @@ public class DataNode extends Configured
     
     DatanodeCommand [] sendHeartBeat() throws IOException {
       return bpNamenode.sendHeartbeat(bpRegistration,
-          data.getCapacity(),
-          data.getDfsUsed(),
-          data.getRemaining(),
-          data.getBlockPoolUsed(blockPoolId),
-          xmitsInProgress.get(),
-          getXceiverCount(), data.getNumFailedVolumes());
+          dn.data.getCapacity(),
+          dn.data.getDfsUsed(),
+          dn.data.getRemaining(),
+          dn.data.getBlockPoolUsed(blockPoolId),
+          dn.xmitsInProgress.get(),
+          dn.getXceiverCount(), dn.data.getNumFailedVolumes());
     }
     
     //This must be called only by blockPoolManager
@@ -1121,21 +1020,9 @@ public class DataNode extends Configured
       
       if(upgradeManager != null)
         upgradeManager.shutdownUpgrade();
-      
-      blockPoolManager.remove(this);
       shouldServiceRun = false;
       RPC.stopProxy(bpNamenode);
-      if (blockScanner != null) {
-        blockScanner.removeBlockPool(this.getBlockPoolId());
-      }
-    
-      if (data != null) { 
-        data.shutdownBlockPool(this.getBlockPoolId());
-      }
-
-      if (storage != null) {
-        storage.removeBlockPoolStorage(this.getBlockPoolId());
-      }
+      dn.shutdownBlockPool(this);
     }
 
     /**
@@ -1144,22 +1031,22 @@ public class DataNode extends Configured
      */
     private void offerService() throws Exception {
       LOG.info("For namenode " + nnAddr + " using DELETEREPORT_INTERVAL of "
-          + deleteReportInterval + " msec " + " BLOCKREPORT_INTERVAL of "
-          + blockReportInterval + "msec" + " Initial delay: "
-          + initialBlockReportDelay + "msec" + "; heartBeatInterval="
-          + heartBeatInterval);
+          + dnConf.deleteReportInterval + " msec " + " BLOCKREPORT_INTERVAL of "
+          + dnConf.blockReportInterval + "msec" + " Initial delay: "
+          + dnConf.initialBlockReportDelay + "msec" + "; heartBeatInterval="
+          + dnConf.heartBeatInterval);
 
       //
       // Now loop for a long time....
       //
-      while (shouldRun && shouldServiceRun) {
+      while (dn.shouldRun && shouldServiceRun) {
         try {
           long startTime = now();
 
           //
           // Every so often, send heartbeat or block-report
           //
-          if (startTime - lastHeartbeat > heartBeatInterval) {
+          if (startTime - lastHeartbeat > dnConf.heartBeatInterval) {
             //
             // All heartbeat messages include following info:
             // -- Datanode name
@@ -1168,9 +1055,9 @@ public class DataNode extends Configured
             // -- Bytes remaining
             //
             lastHeartbeat = startTime;
-            if (!heartbeatsDisabledForTests) {
+            if (!dn.heartbeatsDisabledForTests) {
               DatanodeCommand[] cmds = sendHeartBeat();
-              metrics.addHeartbeat(now() - startTime);
+              dn.metrics.addHeartbeat(now() - startTime);
 
               long startProcessCommands = now();
               if (!processCommand(cmds))
@@ -1183,7 +1070,7 @@ public class DataNode extends Configured
             }
           }
           if (pendingReceivedRequests > 0
-              || (startTime - lastDeletedReport > deleteReportInterval)) {
+              || (startTime - lastDeletedReport > dnConf.deleteReportInterval)) {
             reportReceivedDeletedBlocks();
             lastDeletedReport = startTime;
           }
@@ -1192,15 +1079,15 @@ public class DataNode extends Configured
           processCommand(cmd);
 
           // Now safe to start scanning the block pool
-          if (blockScanner != null) {
-            blockScanner.addBlockPool(this.blockPoolId);
+          if (dn.blockScanner != null) {
+            dn.blockScanner.addBlockPool(this.blockPoolId);
           }
 
           //
           // There is no work to do;  sleep until hearbeat timer elapses, 
           // or work arrives, and then iterate again.
           //
-          long waitTime = heartBeatInterval - 
+          long waitTime = dnConf.heartBeatInterval - 
           (System.currentTimeMillis() - lastHeartbeat);
           synchronized(receivedAndDeletedBlockList) {
             if (waitTime > 0 && pendingReceivedRequests == 0) {
@@ -1223,7 +1110,7 @@ public class DataNode extends Configured
           }
           LOG.warn("RemoteException in offerService", re);
           try {
-            long sleepTime = Math.min(1000, heartBeatInterval);
+            long sleepTime = Math.min(1000, dnConf.heartBeatInterval);
             Thread.sleep(sleepTime);
           } catch (InterruptedException ie) {
             Thread.currentThread().interrupt();
@@ -1269,7 +1156,7 @@ public class DataNode extends Configured
           (bpNSInfo.getLayoutVersion(), "namenode");
       }
 
-      while(shouldRun && shouldServiceRun) {
+      while(dn.shouldRun && shouldServiceRun) {
         try {
           // Use returned registration from namenode with updated machine name.
           bpRegistration = bpNamenode.registerDatanode(bpRegistration);
@@ -1277,8 +1164,6 @@ public class DataNode extends Configured
           LOG.info("bpReg after =" + bpRegistration.storageInfo + 
               ";sid=" + bpRegistration.storageID + ";name="+bpRegistration.getName());
 
-          NetUtils.getHostname();
-          hostName = bpRegistration.getHost();
           break;
         } catch(SocketTimeoutException e) {  // namenode is busy
           LOG.info("Problem connecting to server: " + nnAddr);
@@ -1287,47 +1172,13 @@ public class DataNode extends Configured
           } catch (InterruptedException ie) {}
         }
       }
-
-      if (storage.getStorageID().equals("")) {
-        storage.setStorageID(bpRegistration.getStorageID());
-        storage.writeAll();
-        LOG.info("New storage id " + bpRegistration.getStorageID()
-            + " is assigned to data-node " + bpRegistration.getName());
-      } else if(!storage.getStorageID().equals(bpRegistration.getStorageID())) {
-        throw new IOException("Inconsistent storage IDs. Name-node returned "
-            + bpRegistration.getStorageID() 
-            + ". Expecting " + storage.getStorageID());
-      }
-
-      if (!isBlockTokenInitialized) {
-        /* first time registering with NN */
-        ExportedBlockKeys keys = bpRegistration.exportedKeys;
-        isBlockTokenEnabled = keys.isBlockTokenEnabled();
-        if (isBlockTokenEnabled) {
-          long blockKeyUpdateInterval = keys.getKeyUpdateInterval();
-          long blockTokenLifetime = keys.getTokenLifetime();
-          LOG.info("Block token params received from NN: for block pool " +
-              blockPoolId + " keyUpdateInterval="
-              + blockKeyUpdateInterval / (60 * 1000)
-              + " min(s), tokenLifetime=" + blockTokenLifetime / (60 * 1000)
-              + " min(s)");
-          final BlockTokenSecretManager secretMgr = 
-            new BlockTokenSecretManager(false, 0, blockTokenLifetime);
-          blockPoolTokenSecretManager.addBlockPool(blockPoolId, secretMgr);
-        }
-        isBlockTokenInitialized = true;
-      }
-
-      if (isBlockTokenEnabled) {
-        blockPoolTokenSecretManager.setKeys(blockPoolId,
-            bpRegistration.exportedKeys);
-        bpRegistration.exportedKeys = ExportedBlockKeys.DUMMY_KEYS;
-      }
+      
+      dn.bpRegistrationSucceeded(bpRegistration, blockPoolId);
 
       LOG.info("in register:" + ";bpDNR="+bpRegistration.storageInfo);
 
       // random short delay - helps scatter the BR from all DNs
-      scheduleBlockReport(initialBlockReportDelay);
+      scheduleBlockReport(dnConf.initialBlockReportDelay);
     }
 
 
@@ -1341,14 +1192,14 @@ public class DataNode extends Configured
      */
     @Override
     public void run() {
-      LOG.info(bpRegistration + "In BPOfferService.run, data = " + data
+      LOG.info(bpRegistration + "In BPOfferService.run, data = " + dn.data
           + ";bp=" + blockPoolId);
 
       try {
         // init stuff
         try {
           // setup storage
-          setupBP(conf, dataDirs);
+          setupBP(dn.conf);
           register();
         } catch (IOException ioe) {
           // Initial handshake, storage recovery or registration failed
@@ -1360,13 +1211,13 @@ public class DataNode extends Configured
 
         initialized = true; // bp is initialized;
         
-        while (shouldRun && shouldServiceRun) {
+        while (dn.shouldRun && shouldServiceRun) {
           try {
             startDistributedUpgradeIfNeeded();
             offerService();
           } catch (Exception ex) {
             LOG.error("Exception in BPOfferService", ex);
-            if (shouldRun && shouldServiceRun) {
+            if (dn.shouldRun && shouldServiceRun) {
               try {
                 Thread.sleep(5000);
               } catch (InterruptedException ie) {
@@ -1379,7 +1230,7 @@ public class DataNode extends Configured
         LOG.warn("Unexpected exception", ex);
       } finally {
         LOG.warn(bpRegistration + " ending block pool service for: " 
-            + blockPoolId);
+            + blockPoolId + " thread " + Thread.currentThread().getId());
         cleanUp();
       }
     }
@@ -1420,8 +1271,8 @@ public class DataNode extends Configured
       switch(cmd.getAction()) {
       case DatanodeProtocol.DNA_TRANSFER:
         // Send a copy of a block to another datanode
-        transferBlocks(bcmd.getBlockPoolId(), bcmd.getBlocks(), bcmd.getTargets());
-        metrics.incrBlocksReplicated(bcmd.getBlocks().length);
+        dn.transferBlocks(bcmd.getBlockPoolId(), bcmd.getBlocks(), bcmd.getTargets());
+        dn.metrics.incrBlocksReplicated(bcmd.getBlocks().length);
         break;
       case DatanodeProtocol.DNA_INVALIDATE:
         //
@@ -1430,16 +1281,16 @@ public class DataNode extends Configured
         //
         Block toDelete[] = bcmd.getBlocks();
         try {
-          if (blockScanner != null) {
-            blockScanner.deleteBlocks(bcmd.getBlockPoolId(), toDelete);
+          if (dn.blockScanner != null) {
+            dn.blockScanner.deleteBlocks(bcmd.getBlockPoolId(), toDelete);
           }
           // using global fsdataset
-          data.invalidate(bcmd.getBlockPoolId(), toDelete);
+          dn.data.invalidate(bcmd.getBlockPoolId(), toDelete);
         } catch(IOException e) {
-          checkDiskError();
+          dn.checkDiskError();
           throw e;
         }
-        metrics.incrBlocksRemoved(toDelete.length);
+        dn.metrics.incrBlocksRemoved(toDelete.length);
         break;
       case DatanodeProtocol.DNA_SHUTDOWN:
         // shut down the data node
@@ -1448,12 +1299,12 @@ public class DataNode extends Configured
       case DatanodeProtocol.DNA_REGISTER:
         // namenode requested a registration - at start or if NN lost contact
         LOG.info("DatanodeCommand action: DNA_REGISTER");
-        if (shouldRun && shouldServiceRun) {
+        if (dn.shouldRun && shouldServiceRun) {
           register();
         }
         break;
       case DatanodeProtocol.DNA_FINALIZE:
-        storage.finalizeUpgrade(((FinalizeCommand) cmd)
+        dn.storage.finalizeUpgrade(((FinalizeCommand) cmd)
             .getBlockPoolId());
         break;
       case UpgradeCommand.UC_ACTION_START_UPGRADE:
@@ -1461,12 +1312,12 @@ public class DataNode extends Configured
         processDistributedUpgradeCommand((UpgradeCommand)cmd);
         break;
       case DatanodeProtocol.DNA_RECOVERBLOCK:
-        recoverBlocks(((BlockRecoveryCommand)cmd).getRecoveringBlocks());
+        dn.recoverBlocks(((BlockRecoveryCommand)cmd).getRecoveringBlocks());
         break;
       case DatanodeProtocol.DNA_ACCESSKEYUPDATE:
         LOG.info("DatanodeCommand action: DNA_ACCESSKEYUPDATE");
-        if (isBlockTokenEnabled) {
-          blockPoolTokenSecretManager.setKeys(blockPoolId, 
+        if (dn.isBlockTokenEnabled) {
+          dn.blockPoolTokenSecretManager.setKeys(blockPoolId, 
               ((KeyUpdateCommand) cmd).getExportedKeys());
         }
         break;
@@ -1476,7 +1327,7 @@ public class DataNode extends Configured
                    ((BalancerBandwidthCommand) cmd).getBalancerBandwidthValue();
         if (bandwidth > 0) {
           DataXceiverServer dxcs =
-                       (DataXceiverServer) dataXceiverServer.getRunnable();
+                       (DataXceiverServer) dn.dataXceiverServer.getRunnable();
           dxcs.balanceThrottler.setBandwidth(bandwidth);
         }
         break;
@@ -1495,7 +1346,7 @@ public class DataNode extends Configured
     synchronized UpgradeManagerDatanode getUpgradeManager() {
       if(upgradeManager == null)
         upgradeManager = 
-          new UpgradeManagerDatanode(DataNode.this, blockPoolId);
+          new UpgradeManagerDatanode(dn, blockPoolId);
       
       return upgradeManager;
     }
@@ -1537,11 +1388,11 @@ public class DataNode extends Configured
     this.secureResources = resources;
     this.dataDirs = dataDirs;
     this.conf = conf;
+    this.dnConf = new DNConf(conf);
 
     storage = new DataStorage();
     
     // global DN settings
-    initConfig(conf);
     registerMXBean();
     initDataXceiver(conf);
     startInfoServer(conf);
@@ -1555,6 +1406,133 @@ public class DataNode extends Configured
     blockPoolManager = new BlockPoolManager(conf);
   }
   
+  /**
+   * Check that the registration returned from a NameNode is consistent
+   * with the information in the storage. If the storage is fresh/unformatted,
+   * sets the storage ID based on this registration.
+   * Also updates the block pool's state in the secret manager.
+   */
+  private synchronized void bpRegistrationSucceeded(DatanodeRegistration bpRegistration,
+      String blockPoolId)
+      throws IOException {
+    hostName = bpRegistration.getHost();
+
+    if (storage.getStorageID().equals("")) {
+      // This is a fresh datanode -- take the storage ID provided by the
+      // NN and persist it.
+      storage.setStorageID(bpRegistration.getStorageID());
+      storage.writeAll();
+      LOG.info("New storage id " + bpRegistration.getStorageID()
+          + " is assigned to data-node " + bpRegistration.getName());
+    } else if(!storage.getStorageID().equals(bpRegistration.getStorageID())) {
+      throw new IOException("Inconsistent storage IDs. Name-node returned "
+          + bpRegistration.getStorageID() 
+          + ". Expecting " + storage.getStorageID());
+    }
+    
+    registerBlockPoolWithSecretManager(bpRegistration, blockPoolId);
+  }
+  
+  /**
+   * After the block pool has contacted the NN, registers that block pool
+   * with the secret manager, updating it with the secrets provided by the NN.
+   * @param bpRegistration
+   * @param blockPoolId
+   * @throws IOException
+   */
+  private void registerBlockPoolWithSecretManager(DatanodeRegistration bpRegistration,
+      String blockPoolId) throws IOException {
+    ExportedBlockKeys keys = bpRegistration.exportedKeys;
+    isBlockTokenEnabled = keys.isBlockTokenEnabled();
+    // TODO should we check that all federated nns are either enabled or
+    // disabled?
+    if (!isBlockTokenEnabled) return;
+    
+    if (!blockPoolTokenSecretManager.isBlockPoolRegistered(blockPoolId)) {
+      long blockKeyUpdateInterval = keys.getKeyUpdateInterval();
+      long blockTokenLifetime = keys.getTokenLifetime();
+      LOG.info("Block token params received from NN: for block pool " +
+          blockPoolId + " keyUpdateInterval="
+          + blockKeyUpdateInterval / (60 * 1000)
+          + " min(s), tokenLifetime=" + blockTokenLifetime / (60 * 1000)
+          + " min(s)");
+      final BlockTokenSecretManager secretMgr = 
+        new BlockTokenSecretManager(false, 0, blockTokenLifetime);
+      blockPoolTokenSecretManager.addBlockPool(blockPoolId, secretMgr);
+    }
+    
+    blockPoolTokenSecretManager.setKeys(blockPoolId,
+        bpRegistration.exportedKeys);
+    bpRegistration.exportedKeys = ExportedBlockKeys.DUMMY_KEYS;
+  }
+
+  /**
+   * Remove the given block pool from the block scanner, dataset, and storage.
+   */
+  private void shutdownBlockPool(BPOfferService bpos) {
+    blockPoolManager.remove(bpos);
+
+    String bpId = bpos.getBlockPoolId();
+    if (blockScanner != null) {
+      blockScanner.removeBlockPool(bpId);
+    }
+  
+    if (data != null) { 
+      data.shutdownBlockPool(bpId);
+    }
+
+    if (storage != null) {
+      storage.removeBlockPoolStorage(bpId);
+    }
+  }
+
+  void initBlockPool(BPOfferService bpOfferService,
+      NamespaceInfo nsInfo) throws IOException {
+    String blockPoolId = nsInfo.getBlockPoolID();
+
+    blockPoolManager.addBlockPool(bpOfferService);
+
+    synchronized (this) {
+      // we do not allow namenode from different cluster to register
+      if(clusterId != null && !clusterId.equals(nsInfo.clusterID)) {
+        throw new IOException(
+            "cannot register with the namenode because clusterid do not match:"
+            + " nn=" + nsInfo.getBlockPoolID() + "; nn cid=" + nsInfo.clusterID + 
+            ";dn cid=" + clusterId);
+      }
+
+      setClusterId(nsInfo.clusterID);
+    }
+    
+    StartupOption startOpt = getStartupOption(conf);
+    assert startOpt != null : "Startup option must be set.";
+
+    boolean simulatedFSDataset = conf.getBoolean(
+        DFS_DATANODE_SIMULATEDDATASTORAGE_KEY,
+        DFS_DATANODE_SIMULATEDDATASTORAGE_DEFAULT);
+    
+    if (!simulatedFSDataset) {
+      // read storage info, lock data dirs and transition fs state if necessary          
+      storage.recoverTransitionRead(DataNode.this, blockPoolId, nsInfo,
+          dataDirs, startOpt);
+      StorageInfo bpStorage = storage.getBPStorage(blockPoolId);
+      LOG.info("setting up storage: nsid=" +
+          bpStorage.getNamespaceID() + ";bpid="
+          + blockPoolId + ";lv=" + storage.getLayoutVersion() +
+          ";nsInfo=" + nsInfo);
+    }
+    initFsDataSet();
+    initPeriodicScanners(conf);    
+    data.addBlockPool(nsInfo.getBlockPoolID(), conf);
+  }
+
+  private DatanodeRegistration createRegistration() {
+    DatanodeRegistration reg = new DatanodeRegistration(getMachineName());
+    reg.setInfoPort(infoServer.getPort());
+    reg.setIpcPort(getIpcPort());
+    return reg;
+  }
+
   BPOfferService[] getAllBpOs() {
     return blockPoolManager.getAllNamenodeThreads();
   }
@@ -1567,8 +1545,7 @@ public class DataNode extends Configured
    * Initializes the {@link #data}. The initialization is done only once, when
    * handshake with the the first namenode is completed.
    */
-  private synchronized void initFsDataSet(Configuration conf,
-      AbstractList<File> dataDirs) throws IOException {
+  private synchronized void initFsDataSet() throws IOException {
     if (data != null) { // Already initialized
       return;
     }
@@ -1663,7 +1640,7 @@ public class DataNode extends Configured
    * Creates either NIO or regular depending on socketWriteTimeout.
    */
   protected Socket newSocket() throws IOException {
-    return (socketWriteTimeout > 0) ? 
+    return (dnConf.socketWriteTimeout > 0) ? 
            SocketChannel.open().socket() : new Socket();                                   
   }
 
@@ -2088,10 +2065,10 @@ public class DataNode extends Configured
         InetSocketAddress curTarget = 
           NetUtils.createSocketAddr(targets[0].getName());
         sock = newSocket();
-        NetUtils.connect(sock, curTarget, socketTimeout);
-        sock.setSoTimeout(targets.length * socketTimeout);
+        NetUtils.connect(sock, curTarget, dnConf.socketTimeout);
+        sock.setSoTimeout(targets.length * dnConf.socketTimeout);
 
-        long writeTimeout = socketWriteTimeout + 
+        long writeTimeout = dnConf.socketWriteTimeout + 
                             HdfsServerConstants.WRITE_TIMEOUT_EXTENSION * (targets.length-1);
         OutputStream baseStream = NetUtils.getOutputStream(sock, writeTimeout);
         out = new DataOutputStream(new BufferedOutputStream(baseStream,
@@ -2534,7 +2511,7 @@ public class DataNode extends Configured
         DatanodeRegistration bpReg = bpos.bpRegistration;
         InterDatanodeProtocol datanode = bpReg.equals(id)?
             this: DataNode.createInterDataNodeProtocolProxy(id, getConf(),
-                socketTimeout);
+                dnConf.socketTimeout);
         ReplicaRecoveryInfo info = callInitReplicaRecovery(datanode, rBlock);
         if (info != null &&
             info.getGenerationStamp() >= block.getGenerationStamp() &&
@@ -2923,20 +2900,8 @@ public class DataNode extends Configured
                        (DataXceiverServer) this.dataXceiverServer.getRunnable();
     return dxcs.balanceThrottler.getBandwidth();
   }
-
-  long getReadaheadLength() {
-    return readaheadLength;
-  }
-
-  boolean shouldDropCacheBehindWrites() {
-    return dropCacheBehindWrites;
-  }
-
-  boolean shouldDropCacheBehindReads() {
-    return dropCacheBehindReads;
-  }
   
-  boolean shouldSyncBehindWrites() {
-    return syncBehindWrites;
+  DNConf getDnConf() {
+    return dnConf;
   }
 }

hadoop-hdfs-project/hadoop-hdfs/src/main/java/org/apache/hadoop/hdfs/server/datanode/DataXceiver.java

@@ -38,7 +38,6 @@ import java.nio.channels.ClosedChannelException;
 import java.util.Arrays;
 
 import org.apache.commons.logging.Log;
-import org.apache.hadoop.hdfs.DFSConfigKeys;
 import org.apache.hadoop.hdfs.protocol.DatanodeInfo;
 import org.apache.hadoop.hdfs.protocol.ExtendedBlock;
 import org.apache.hadoop.hdfs.protocol.HdfsConstants;
@@ -82,9 +81,9 @@ class DataXceiver extends Receiver implements Runnable {
   private final String remoteAddress; // address of remote side
   private final String localAddress;  // local address of this daemon
   private final DataNode datanode;
+  private final DNConf dnConf;
   private final DataXceiverServer dataXceiverServer;
 
-  private int socketKeepaliveTimeout;
   private long opStartTime; //the start time of receiving an Op
   
   public DataXceiver(Socket s, DataNode datanode, 
@@ -95,14 +94,11 @@ class DataXceiver extends Receiver implements Runnable {
     this.s = s;
     this.isLocal = s.getInetAddress().equals(s.getLocalAddress());
     this.datanode = datanode;
+    this.dnConf = datanode.getDnConf();
     this.dataXceiverServer = dataXceiverServer;
     remoteAddress = s.getRemoteSocketAddress().toString();
     localAddress = s.getLocalSocketAddress().toString();
 
-    socketKeepaliveTimeout = datanode.getConf().getInt(
-        DFSConfigKeys.DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_KEY,
-        DFSConfigKeys.DFS_DATANODE_SOCKET_REUSE_KEEPALIVE_DEFAULT);
-
     if (LOG.isDebugEnabled()) {
       LOG.debug("Number of active connections is: "
           + datanode.getXceiverCount());
@@ -144,8 +140,8 @@ class DataXceiver extends Receiver implements Runnable {
 
         try {
           if (opsProcessed != 0) {
-            assert socketKeepaliveTimeout > 0;
-            s.setSoTimeout(socketKeepaliveTimeout);
+            assert dnConf.socketKeepaliveTimeout > 0;
+            s.setSoTimeout(dnConf.socketKeepaliveTimeout);
           }
           op = readOp();
         } catch (InterruptedIOException ignored) {
@@ -180,7 +176,7 @@ class DataXceiver extends Receiver implements Runnable {
         opStartTime = now();
         processOp(op);
         ++opsProcessed;
-      } while (!s.isClosed() && socketKeepaliveTimeout > 0);
+      } while (!s.isClosed() && dnConf.socketKeepaliveTimeout > 0);
     } catch (Throwable t) {
       LOG.error(datanode.getMachineName() + ":DataXceiver error processing " +
                 ((op == null) ? "unknown" : op.name()) + " operation " +
@@ -205,7 +201,7 @@ class DataXceiver extends Receiver implements Runnable {
       final long blockOffset,
       final long length) throws IOException {
     OutputStream baseStream = NetUtils.getOutputStream(s, 
-        datanode.socketWriteTimeout);
+        dnConf.socketWriteTimeout);
     DataOutputStream out = new DataOutputStream(new BufferedOutputStream(
         baseStream, HdfsConstants.SMALL_BUFFER_SIZE));
     checkAccess(out, true, block, blockToken,
@@ -231,13 +227,13 @@ class DataXceiver extends Receiver implements Runnable {
       } catch(IOException e) {
         String msg = "opReadBlock " + block + " received exception " + e; 
         LOG.info(msg);
-        sendResponse(s, ERROR, msg, datanode.socketWriteTimeout);
+        sendResponse(s, ERROR, msg, dnConf.socketWriteTimeout);
         throw e;
       }
       
       // send op status
       writeSuccessWithChecksumInfo(blockSender,
-          getStreamWithTimeout(s, datanode.socketWriteTimeout));
+          getStreamWithTimeout(s, dnConf.socketWriteTimeout));
 
       long read = blockSender.sendBlock(out, baseStream, null); // send data
 
@@ -335,7 +331,7 @@ class DataXceiver extends Receiver implements Runnable {
     // reply to upstream datanode or client 
     final DataOutputStream replyOut = new DataOutputStream(
         new BufferedOutputStream(
-            NetUtils.getOutputStream(s, datanode.socketWriteTimeout),
+            NetUtils.getOutputStream(s, dnConf.socketWriteTimeout),
             HdfsConstants.SMALL_BUFFER_SIZE));
     checkAccess(replyOut, isClient, block, blockToken,
         Op.WRITE_BLOCK, BlockTokenSecretManager.AccessMode.WRITE);
@@ -370,9 +366,9 @@ class DataXceiver extends Receiver implements Runnable {
         mirrorTarget = NetUtils.createSocketAddr(mirrorNode);
         mirrorSock = datanode.newSocket();
         try {
-          int timeoutValue = datanode.socketTimeout
+          int timeoutValue = dnConf.socketTimeout
               + (HdfsServerConstants.READ_TIMEOUT_EXTENSION * targets.length);
-          int writeTimeout = datanode.socketWriteTimeout + 
+          int writeTimeout = dnConf.socketWriteTimeout + 
                       (HdfsServerConstants.WRITE_TIMEOUT_EXTENSION * targets.length);
           NetUtils.connect(mirrorSock, mirrorTarget, timeoutValue);
           mirrorSock.setSoTimeout(timeoutValue);
@@ -508,7 +504,7 @@ class DataXceiver extends Receiver implements Runnable {
     updateCurrentThreadName(Op.TRANSFER_BLOCK + " " + blk);
 
     final DataOutputStream out = new DataOutputStream(
-        NetUtils.getOutputStream(s, datanode.socketWriteTimeout));
+        NetUtils.getOutputStream(s, dnConf.socketWriteTimeout));
     try {
       datanode.transferReplicaForPipelineRecovery(blk, targets, clientName);
       writeResponse(Status.SUCCESS, null, out);
@@ -521,7 +517,7 @@ class DataXceiver extends Receiver implements Runnable {
   public void blockChecksum(final ExtendedBlock block,
       final Token<BlockTokenIdentifier> blockToken) throws IOException {
     final DataOutputStream out = new DataOutputStream(
-        NetUtils.getOutputStream(s, datanode.socketWriteTimeout));
+        NetUtils.getOutputStream(s, dnConf.socketWriteTimeout));
     checkAccess(out, true, block, blockToken,
         Op.BLOCK_CHECKSUM, BlockTokenSecretManager.AccessMode.READ);
     updateCurrentThreadName("Reading metadata for block " + block);
@@ -581,7 +577,7 @@ class DataXceiver extends Receiver implements Runnable {
         LOG.warn("Invalid access token in request from " + remoteAddress
             + " for OP_COPY_BLOCK for block " + block + " : "
             + e.getLocalizedMessage());
-        sendResponse(s, ERROR_ACCESS_TOKEN, "Invalid access token", datanode.socketWriteTimeout);
+        sendResponse(s, ERROR_ACCESS_TOKEN, "Invalid access token", dnConf.socketWriteTimeout);
         return;
       }
 
@@ -591,7 +587,7 @@ class DataXceiver extends Receiver implements Runnable {
       String msg = "Not able to copy block " + block.getBlockId() + " to " 
       + s.getRemoteSocketAddress() + " because threads quota is exceeded."; 
       LOG.info(msg);
-      sendResponse(s, ERROR, msg, datanode.socketWriteTimeout);
+      sendResponse(s, ERROR, msg, dnConf.socketWriteTimeout);
       return;
     }
 
@@ -606,7 +602,7 @@ class DataXceiver extends Receiver implements Runnable {
 
       // set up response stream
       OutputStream baseStream = NetUtils.getOutputStream(
-          s, datanode.socketWriteTimeout);
+          s, dnConf.socketWriteTimeout);
       reply = new DataOutputStream(new BufferedOutputStream(
           baseStream, HdfsConstants.SMALL_BUFFER_SIZE));
 
@@ -659,7 +655,7 @@ class DataXceiver extends Receiver implements Runnable {
             + " for OP_REPLACE_BLOCK for block " + block + " : "
             + e.getLocalizedMessage());
         sendResponse(s, ERROR_ACCESS_TOKEN, "Invalid access token",
-            datanode.socketWriteTimeout);
+            dnConf.socketWriteTimeout);
         return;
       }
     }
@@ -668,7 +664,7 @@ class DataXceiver extends Receiver implements Runnable {
       String msg = "Not able to receive block " + block.getBlockId() + " from " 
           + s.getRemoteSocketAddress() + " because threads quota is exceeded."; 
       LOG.warn(msg);
-      sendResponse(s, ERROR, msg, datanode.socketWriteTimeout);
+      sendResponse(s, ERROR, msg, dnConf.socketWriteTimeout);
       return;
     }
 
@@ -684,11 +680,11 @@ class DataXceiver extends Receiver implements Runnable {
       InetSocketAddress proxyAddr = NetUtils.createSocketAddr(
           proxySource.getName());
       proxySock = datanode.newSocket();
-      NetUtils.connect(proxySock, proxyAddr, datanode.socketTimeout);
-      proxySock.setSoTimeout(datanode.socketTimeout);
+      NetUtils.connect(proxySock, proxyAddr, dnConf.socketTimeout);
+      proxySock.setSoTimeout(dnConf.socketTimeout);
 
       OutputStream baseStream = NetUtils.getOutputStream(proxySock, 
-          datanode.socketWriteTimeout);
+          dnConf.socketWriteTimeout);
       proxyOut = new DataOutputStream(new BufferedOutputStream(baseStream,
           HdfsConstants.SMALL_BUFFER_SIZE));
 
@@ -750,7 +746,7 @@ class DataXceiver extends Receiver implements Runnable {
       
       // send response back
       try {
-        sendResponse(s, opStatus, errMsg, datanode.socketWriteTimeout);
+        sendResponse(s, opStatus, errMsg, dnConf.socketWriteTimeout);
       } catch (IOException ioe) {
         LOG.warn("Error writing reply back to " + s.getRemoteSocketAddress());
       }
@@ -826,7 +822,7 @@ class DataXceiver extends Receiver implements Runnable {
           if (reply) {
             if (out == null) {
               out = new DataOutputStream(
-                  NetUtils.getOutputStream(s, datanode.socketWriteTimeout));
+                  NetUtils.getOutputStream(s, dnConf.socketWriteTimeout));
             }
             
             BlockOpResponseProto.Builder resp = BlockOpResponseProto.newBuilder()

hadoop-hdfs-project/hadoop-hdfs/src/main/packages/deb/init.d/hadoop-secondarynamenode

@@ -67,7 +67,7 @@ check_privsep_dir() {
 }
 
 export PATH="${PATH:+$PATH:}/usr/sbin:/usr/bin"
-export HADOOP_PREFIX="/usr"
+export HADOOP_PREFIX=${HADOOP_PREFIX:-/usr}
 
 case "$1" in
   start)

hadoop-hdfs-project/hadoop-hdfs/src/main/packages/rpm/init.d/hadoop-secondarynamenode

@@ -27,7 +27,7 @@ source /etc/default/hadoop-env.sh
 RETVAL=0
 PIDFILE="${HADOOP_PID_DIR}/hadoop-hdfs-secondarynamenode.pid"
 desc="Hadoop secondary namenode daemon"
-export HADOOP_PREFIX="/usr"
+export HADOOP_PREFIX=${HADOOP_PREFIX:-/usr}
 
 start() {
   echo -n $"Starting $desc (hadoop-secondarynamenode): "

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/DataNodeTestUtils.java

@@ -61,7 +61,7 @@ public class DataNodeTestUtils {
       bpos.setNamespaceInfo(nsifno);
 
       dn.setBPNamenode(bpid, nn);
-      bpos.setupBPStorage();
+      dn.initBlockPool(bpos, nsifno);
     }
   }
 }

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/TestInterDatanodeProtocol.java

@@ -154,7 +154,7 @@ public class TestInterDatanodeProtocol {
       //connect to a data node
       DataNode datanode = cluster.getDataNode(datanodeinfo[0].getIpcPort());
       InterDatanodeProtocol idp = DataNode.createInterDataNodeProtocolProxy(
-          datanodeinfo[0], conf, datanode.socketTimeout);
+          datanodeinfo[0], conf, datanode.getDnConf().socketTimeout);
       assertTrue(datanode != null);
       
       //stop block scanner, so we could compare lastScanTime

hadoop-mapreduce-project/CHANGES.txt

@@ -34,6 +34,12 @@ Trunk (unreleased changes)
     MAPREDUCE-3149. Add a test to verify that TokenCache handles file system 
     uri with no authority. (John George via jitendra)
 
+    MAPREDUCE-3169. Create a new MiniMRCluster equivalent which only provides 
+    client APIs cross MR1 and MR2. (Ahmed via tucu)
+
+    MAPREDUCE-3415. improve MiniMRYarnCluster & DistributedShell JAR resolution.
+    (tucu)
+
   BUG FIXES
     MAPREDUCE-3346. [Rumen] LoggedTaskAttempt#getHostName() returns null. 
                     (amarrk)
@@ -94,6 +100,12 @@ Release 0.23.1 - Unreleased
     MAPREDUCE-3102. Changed NodeManager to fail fast when LinuxContainerExecutor
     has wrong configuration or permissions. (Hitesh Shah via vinodkv)
 
+    MAPREDUCE-3373. Hadoop scripts unconditionally source
+    "$bin"/../libexec/hadoop-config.sh. (Bruno Mahé via tomwhite)
+
+    MAPREDUCE-3372. HADOOP_PREFIX cannot be overridden.
+    (Bruno Mahé via tomwhite)
+
   OPTIMIZATIONS
 
   BUG FIXES

hadoop-mapreduce-project/bin/mapred

@@ -19,8 +19,10 @@ bin=`which $0`
 bin=`dirname ${bin}`
 bin=`cd "$bin"; pwd`
 
-if [ -e $bin/../libexec/mapred-config.sh ]; then
-  . $bin/../libexec/mapred-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+if [ -e ${HADOOP_LIBEXEC_DIR}/mapred-config.sh ]; then
+  . ${HADOOP_LIBEXEC_DIR}/mapred-config.sh
 else
   . "$bin/mapred-config.sh"
 fi

hadoop-mapreduce-project/bin/mapred-config.sh

@@ -22,8 +22,10 @@ bin=`which "$0"`
 bin=`dirname "${bin}"`
 bin=`cd "$bin"; pwd`
 
-if [ -e "$bin/../libexec/hadoop-config.sh" ]; then
-  . "$bin/../libexec/hadoop-config.sh"
+DEFAULT_LIBEXEC_DIR="$bin"/../libexec
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+if [ -e "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh" ]; then
+  . "${HADOOP_LIBEXEC_DIR}/hadoop-config.sh"
 elif [ -e "${HADOOP_COMMON_HOME}/libexec/hadoop-config.sh" ]; then
   . "$HADOOP_COMMON_HOME"/libexec/hadoop-config.sh
 elif [ -e "${HADOOP_COMMON_HOME}/bin/hadoop-config.sh" ]; then

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/pom.xml

@@ -101,16 +101,9 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <systemPropertyVariables>
-            <yarn.mr.jar>${project.parent.basedir}/hadoop-mapreduce-client-app/target/hadoop-mapreduce-client-app-${project.version}.jar</yarn.mr.jar>
-          </systemPropertyVariables>
           <environmentVariables>
             <JAVA_HOME>${java.home}</JAVA_HOME>
           </environmentVariables>
-          <additionalClasspathElements>
-            <!-- workaround for JobConf#setJarByClass -->
-            <additionalClasspathElement>${project.build.directory}/${project.artifactId}-${project.version}-tests.jar</additionalClasspathElement>
-          </additionalClasspathElements>
         </configuration>
       </plugin>
     </plugins>

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

@@ -0,0 +1,38 @@
+/**
+ * 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.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+
+/*
+ * A simple interface for a client MR cluster used for testing. This interface
+ * provides basic methods which are independent of the underlying Mini Cluster (
+ * either through MR1 or MR2).
+ */
+public interface MiniMRClientCluster {
+
+  public void start() throws IOException;
+
+  public void stop() throws IOException;
+
+  public Configuration getConfig() throws IOException;
+
+}

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

@@ -0,0 +1,72 @@
+/**
+ * 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.IOException;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.fs.permission.FsPermission;
+import org.apache.hadoop.mapreduce.Job;
+import org.apache.hadoop.mapreduce.v2.MiniMRYarnCluster;
+import org.apache.hadoop.util.JarFinder;
+
+/**
+ * A MiniMRCluster factory. In MR2, it provides a wrapper MiniMRClientCluster
+ * interface around the MiniMRYarnCluster. While in MR1, it provides such
+ * wrapper around MiniMRCluster. This factory should be used in tests to provide
+ * an easy migration of tests across MR1 and MR2.
+ */
+public class MiniMRClientClusterFactory {
+
+  public static MiniMRClientCluster create(Class<?> caller, int noOfNMs,
+      Configuration conf) throws IOException {
+
+    if (conf == null) {
+      conf = new Configuration();
+    }
+
+    FileSystem fs = FileSystem.get(conf);
+
+    Path testRootDir = new Path("target", caller.getName() + "-tmpDir")
+        .makeQualified(fs);
+    Path appJar = new Path(testRootDir, "MRAppJar.jar");
+
+    // Copy MRAppJar and make it private.
+    Path appMasterJar = new Path(MiniMRYarnCluster.APPJAR);
+
+    fs.copyFromLocalFile(appMasterJar, appJar);
+    fs.setPermission(appJar, new FsPermission("700"));
+
+    Job job = Job.getInstance(conf);
+
+    job.addFileToClassPath(appJar);
+    String callerJar = JarFinder.getJar(caller);
+    job.setJar(callerJar);
+
+    MiniMRYarnCluster miniMRYarnCluster = new MiniMRYarnCluster(caller
+        .getName(), noOfNMs);
+    miniMRYarnCluster.init(job.getConfiguration());
+    miniMRYarnCluster.start();
+
+    return new MiniMRYarnClusterAdapter(miniMRYarnCluster);
+  }
+
+}

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

@@ -0,0 +1,262 @@
+/**
+ * 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.IOException;
+
+import org.apache.commons.logging.Log;
+import org.apache.commons.logging.LogFactory;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.security.AccessControlException;
+import org.apache.hadoop.security.UserGroupInformation;
+
+/**
+ * This class is an MR2 replacement for older MR1 MiniMRCluster, that was used
+ * by tests prior to MR2. This replacement class uses the new MiniMRYarnCluster
+ * in MR2 but provides the same old MR1 interface, so tests can be migrated from
+ * MR1 to MR2 with minimal changes.
+ *
+ * Due to major differences between MR1 and MR2, a number of methods are either
+ * unimplemented/unsupported or were re-implemented to provide wrappers around
+ * MR2 functionality.
+ */
+public class MiniMRCluster {
+  private static final Log LOG = LogFactory.getLog(MiniMRCluster.class);
+
+  private MiniMRClientCluster mrClientCluster;
+
+  public String getTaskTrackerLocalDir(int taskTracker) {
+    throw new UnsupportedOperationException();
+  }
+
+  public String[] getTaskTrackerLocalDirs(int taskTracker) {
+    throw new UnsupportedOperationException();
+  }
+
+  class JobTrackerRunner {
+    // Mock class
+  }
+
+  class TaskTrackerRunner {
+    // Mock class
+  }
+
+  public JobTrackerRunner getJobTrackerRunner() {
+    throw new UnsupportedOperationException();
+  }
+
+  TaskTrackerRunner getTaskTrackerRunner(int id) {
+    throw new UnsupportedOperationException();
+  }
+
+  public int getNumTaskTrackers() {
+    throw new UnsupportedOperationException();
+  }
+
+  public void setInlineCleanupThreads() {
+    throw new UnsupportedOperationException();
+  }
+
+  public void waitUntilIdle() {
+    throw new UnsupportedOperationException();
+  }
+
+  private void waitTaskTrackers() {
+    throw new UnsupportedOperationException();
+  }
+
+  public int getJobTrackerPort() {
+    throw new UnsupportedOperationException();
+  }
+
+  public JobConf createJobConf() {
+    JobConf jobConf = null;
+    try {
+      jobConf = new JobConf(mrClientCluster.getConfig());
+    } catch (IOException e) {
+      LOG.error(e);
+    }
+    return jobConf;
+  }
+
+  public JobConf createJobConf(JobConf conf) {
+    JobConf jobConf = null;
+    try {
+      jobConf = new JobConf(mrClientCluster.getConfig());
+    } catch (IOException e) {
+      LOG.error(e);
+    }
+    return jobConf;
+  }
+
+  static JobConf configureJobConf(JobConf conf, String namenode,
+      int jobTrackerPort, int jobTrackerInfoPort, UserGroupInformation ugi) {
+    throw new UnsupportedOperationException();
+  }
+
+  public MiniMRCluster(int numTaskTrackers, String namenode, int numDir,
+      String[] racks, String[] hosts) throws IOException {
+    this(0, 0, numTaskTrackers, namenode, numDir, racks, hosts);
+  }
+
+  public MiniMRCluster(int numTaskTrackers, String namenode, int numDir,
+      String[] racks, String[] hosts, JobConf conf) throws IOException {
+    this(0, 0, numTaskTrackers, namenode, numDir, racks, hosts, null, conf);
+  }
+
+  public MiniMRCluster(int numTaskTrackers, String namenode, int numDir)
+      throws IOException {
+    this(0, 0, numTaskTrackers, namenode, numDir);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir) throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        null);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks)
+      throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        racks, null);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks,
+      String[] hosts) throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        racks, hosts, null);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks,
+      String[] hosts, UserGroupInformation ugi) throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        racks, hosts, ugi, null);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks,
+      String[] hosts, UserGroupInformation ugi, JobConf conf)
+      throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        racks, hosts, ugi, conf, 0);
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks,
+      String[] hosts, UserGroupInformation ugi, JobConf conf,
+      int numTrackerToExclude) throws IOException {
+    this(jobTrackerPort, taskTrackerPort, numTaskTrackers, namenode, numDir,
+        racks, hosts, ugi, conf, numTrackerToExclude, new Clock());
+  }
+
+  public MiniMRCluster(int jobTrackerPort, int taskTrackerPort,
+      int numTaskTrackers, String namenode, int numDir, String[] racks,
+      String[] hosts, UserGroupInformation ugi, JobConf conf,
+      int numTrackerToExclude, Clock clock) throws IOException {
+    if (conf == null) conf = new JobConf();
+    FileSystem.setDefaultUri(conf, namenode);
+    mrClientCluster = MiniMRClientClusterFactory.create(this.getClass(),
+        numTaskTrackers, conf);
+  }
+
+  public UserGroupInformation getUgi() {
+    throw new UnsupportedOperationException();
+  }
+
+  public TaskCompletionEvent[] getTaskCompletionEvents(JobID id, int from,
+      int max) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public void setJobPriority(JobID jobId, JobPriority priority)
+      throws AccessControlException, IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public JobPriority getJobPriority(JobID jobId) {
+    throw new UnsupportedOperationException();
+  }
+
+  public long getJobFinishTime(JobID jobId) {
+    throw new UnsupportedOperationException();
+  }
+
+  public void initializeJob(JobID jobId) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public MapTaskCompletionEventsUpdate getMapTaskCompletionEventsUpdates(
+      int index, JobID jobId, int max) throws IOException {
+    throw new UnsupportedOperationException();
+  }
+
+  public JobConf getJobTrackerConf() {
+    JobConf jobConf = null;
+    try {
+      jobConf = new JobConf(mrClientCluster.getConfig());
+    } catch (IOException e) {
+      LOG.error(e);
+    }
+    return jobConf;
+  }
+
+  public int getFaultCount(String hostName) {
+    throw new UnsupportedOperationException();
+  }
+
+  public void startJobTracker() {
+    // Do nothing
+  }
+
+  public void startJobTracker(boolean wait) {
+    // Do nothing
+  }
+
+  public void stopJobTracker() {
+    // Do nothing
+  }
+
+  public void stopTaskTracker(int id) {
+    // Do nothing
+  }
+
+  public void startTaskTracker(String host, String rack, int idx, int numDir)
+      throws IOException {
+    // Do nothing
+  }
+
+  void addTaskTracker(TaskTrackerRunner taskTracker) {
+    throw new UnsupportedOperationException();
+  }
+
+  int getTaskTrackerID(String trackerName) {
+    throw new UnsupportedOperationException();
+  }
+
+  public void shutdown() {
+    try {
+      mrClientCluster.stop();
+    } catch (IOException e) {
+      LOG.error(e);
+    }
+  }
+
+}

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

@@ -0,0 +1,51 @@
+/**
+ * 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 org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.mapreduce.v2.MiniMRYarnCluster;
+
+/**
+ * An adapter for MiniMRYarnCluster providing a MiniMRClientCluster interface.
+ * This interface could be used by tests across both MR1 and MR2.
+ */
+public class MiniMRYarnClusterAdapter implements MiniMRClientCluster {
+
+  private MiniMRYarnCluster miniMRYarnCluster;
+
+  public MiniMRYarnClusterAdapter(MiniMRYarnCluster miniMRYarnCluster) {
+    this.miniMRYarnCluster = miniMRYarnCluster;
+  }
+
+  @Override
+  public Configuration getConfig() {
+    return miniMRYarnCluster.getConfig();
+  }
+
+  @Override
+  public void start() {
+    miniMRYarnCluster.start();
+  }
+
+  @Override
+  public void stop() {
+    miniMRYarnCluster.stop();
+  }
+
+}

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

@@ -0,0 +1,170 @@
+/**
+ * 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 static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+import java.io.IOException;
+import java.util.StringTokenizer;
+
+import org.apache.hadoop.conf.Configuration;
+import org.apache.hadoop.fs.FSDataOutputStream;
+import org.apache.hadoop.fs.FileSystem;
+import org.apache.hadoop.fs.Path;
+import org.apache.hadoop.io.IntWritable;
+import org.apache.hadoop.io.Text;
+import org.apache.hadoop.mapreduce.Counters;
+import org.apache.hadoop.mapreduce.Job;
+import org.junit.AfterClass;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+/**
+ * Basic testing for the MiniMRClientCluster. This test shows an example class
+ * that can be used in MR1 or MR2, without any change to the test. The test will
+ * use MiniMRYarnCluster in MR2, and MiniMRCluster in MR1.
+ */
+public class TestMiniMRClientCluster {
+
+  private static Path inDir = null;
+  private static Path outDir = null;
+  private static Path testdir = null;
+  private static Path[] inFiles = new Path[5];
+  private static MiniMRClientCluster mrCluster;
+
+  @BeforeClass
+  public static void setup() throws IOException {
+    final Configuration conf = new Configuration();
+    final Path TEST_ROOT_DIR = new Path(System.getProperty("test.build.data",
+        "/tmp"));
+    testdir = new Path(TEST_ROOT_DIR, "TestMiniMRClientCluster");
+    inDir = new Path(testdir, "in");
+    outDir = new Path(testdir, "out");
+
+    FileSystem fs = FileSystem.getLocal(conf);
+    if (fs.exists(testdir) && !fs.delete(testdir, true)) {
+      throw new IOException("Could not delete " + testdir);
+    }
+    if (!fs.mkdirs(inDir)) {
+      throw new IOException("Mkdirs failed to create " + inDir);
+    }
+
+    for (int i = 0; i < inFiles.length; i++) {
+      inFiles[i] = new Path(inDir, "part_" + i);
+      createFile(inFiles[i], conf);
+    }
+
+    // create the mini cluster to be used for the tests
+    mrCluster = MiniMRClientClusterFactory.create(
+        TestMiniMRClientCluster.class, 1, new Configuration());
+  }
+
+  @AfterClass
+  public static void cleanup() throws IOException {
+    // clean up the input and output files
+    final Configuration conf = new Configuration();
+    final FileSystem fs = testdir.getFileSystem(conf);
+    if (fs.exists(testdir)) {
+      fs.delete(testdir, true);
+    }
+    // stopping the mini cluster
+    mrCluster.stop();
+  }
+
+  @Test
+  public void testJob() throws Exception {
+    final Job job = createJob();
+    org.apache.hadoop.mapreduce.lib.input.FileInputFormat.setInputPaths(job,
+        inDir);
+    org.apache.hadoop.mapreduce.lib.output.FileOutputFormat.setOutputPath(job,
+        new Path(outDir, "testJob"));
+    assertTrue(job.waitForCompletion(true));
+    validateCounters(job.getCounters(), 5, 25, 5, 5);
+  }
+
+  private void validateCounters(Counters counters, long mapInputRecords,
+      long mapOutputRecords, long reduceInputGroups, long reduceOutputRecords) {
+    assertEquals("MapInputRecords", mapInputRecords, counters.findCounter(
+        "MyCounterGroup", "MAP_INPUT_RECORDS").getValue());
+    assertEquals("MapOutputRecords", mapOutputRecords, counters.findCounter(
+        "MyCounterGroup", "MAP_OUTPUT_RECORDS").getValue());
+    assertEquals("ReduceInputGroups", reduceInputGroups, counters.findCounter(
+        "MyCounterGroup", "REDUCE_INPUT_GROUPS").getValue());
+    assertEquals("ReduceOutputRecords", reduceOutputRecords, counters
+        .findCounter("MyCounterGroup", "REDUCE_OUTPUT_RECORDS").getValue());
+  }
+
+  private static void createFile(Path inFile, Configuration conf)
+      throws IOException {
+    final FileSystem fs = inFile.getFileSystem(conf);
+    if (fs.exists(inFile)) {
+      return;
+    }
+    FSDataOutputStream out = fs.create(inFile);
+    out.writeBytes("This is a test file");
+    out.close();
+  }
+
+  public static Job createJob() throws IOException {
+    final Job baseJob = new Job(mrCluster.getConfig());
+    baseJob.setOutputKeyClass(Text.class);
+    baseJob.setOutputValueClass(IntWritable.class);
+    baseJob.setMapperClass(MyMapper.class);
+    baseJob.setReducerClass(MyReducer.class);
+    baseJob.setNumReduceTasks(1);
+    return baseJob;
+  }
+
+  public static class MyMapper extends
+      org.apache.hadoop.mapreduce.Mapper<Object, Text, Text, IntWritable> {
+    private final static IntWritable one = new IntWritable(1);
+    private Text word = new Text();
+
+    public void map(Object key, Text value, Context context)
+        throws IOException, InterruptedException {
+      context.getCounter("MyCounterGroup", "MAP_INPUT_RECORDS").increment(1);
+      StringTokenizer iter = new StringTokenizer(value.toString());
+      while (iter.hasMoreTokens()) {
+        word.set(iter.nextToken());
+        context.write(word, one);
+        context.getCounter("MyCounterGroup", "MAP_OUTPUT_RECORDS").increment(1);
+      }
+    }
+  }
+
+  public static class MyReducer extends
+      org.apache.hadoop.mapreduce.Reducer<Text, IntWritable, Text, IntWritable> {
+    private IntWritable result = new IntWritable();
+
+    public void reduce(Text key, Iterable<IntWritable> values, Context context)
+        throws IOException, InterruptedException {
+      context.getCounter("MyCounterGroup", "REDUCE_INPUT_GROUPS").increment(1);
+      int sum = 0;
+      for (IntWritable val : values) {
+        sum += val.get();
+      }
+      result.set(sum);
+      context.write(key, result);
+      context.getCounter("MyCounterGroup", "REDUCE_OUTPUT_RECORDS")
+          .increment(1);
+    }
+  }
+
+}

hadoop-mapreduce-project/hadoop-mapreduce-client/hadoop-mapreduce-client-jobclient/src/test/java/org/apache/hadoop/mapreduce/v2/MiniMRYarnCluster.java

@@ -24,13 +24,13 @@ import java.io.IOException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.mapred.JobConf;
 import org.apache.hadoop.mapred.LocalContainerLauncher;
 import org.apache.hadoop.mapred.ShuffleHandler;
 import org.apache.hadoop.mapreduce.MRConfig;
 import org.apache.hadoop.mapreduce.MRJobConfig;
 import org.apache.hadoop.mapreduce.v2.hs.JobHistoryServer;
 import org.apache.hadoop.mapreduce.v2.jobhistory.JHAdminConfig;
+import org.apache.hadoop.util.JarFinder;
 import org.apache.hadoop.yarn.YarnException;
 import org.apache.hadoop.yarn.conf.YarnConfiguration;
 import org.apache.hadoop.yarn.server.MiniYARNCluster;
@@ -45,8 +45,7 @@ import org.apache.hadoop.yarn.service.Service;
  */
 public class MiniMRYarnCluster extends MiniYARNCluster {
 
-  public static final String APPJAR = System.getProperty("yarn.mr.jar", JobConf
-      .findContainingJar(LocalContainerLauncher.class));
+  public static final String APPJAR = JarFinder.getJar(LocalContainerLauncher.class);
 
   private static final Log LOG = LogFactory.getLog(MiniMRYarnCluster.class);
   private JobHistoryServer historyServer;
@@ -55,7 +54,7 @@ public class MiniMRYarnCluster extends MiniYARNCluster {
   public MiniMRYarnCluster(String testName) {
     this(testName, 1);
   }
-  
+
   public MiniMRYarnCluster(String testName, int noOfNMs) {
     super(testName, noOfNMs);
     //TODO: add the history server
@@ -88,9 +87,9 @@ public class MiniMRYarnCluster extends MiniYARNCluster {
     conf.setBoolean(MRJobConfig.JOB_UBERTASK_ENABLE, false);
 
     // Set config for JH Server
-    conf.set(JHAdminConfig.MR_HISTORY_ADDRESS, 
+    conf.set(JHAdminConfig.MR_HISTORY_ADDRESS,
         JHAdminConfig.DEFAULT_MR_HISTORY_ADDRESS);
-    
+
     super.init(conf);
   }
 

hadoop-mapreduce-project/hadoop-yarn/bin/slaves.sh

@@ -38,7 +38,9 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
 
 # If the slaves file is specified in the command line,
 # then it takes precedence over the definition in 

hadoop-mapreduce-project/hadoop-yarn/bin/start-all.sh

@@ -23,7 +23,10 @@ echo "starting yarn daemons"
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
+
 # start resourceManager
 "$bin"/yarn-daemon.sh --config $YARN_CONF_DIR  start resourcemanager
 # start nodeManager

hadoop-mapreduce-project/hadoop-yarn/bin/stop-all.sh

@@ -23,7 +23,10 @@ echo "stopping yarn daemons"
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
+
 # stop resourceManager
 "$bin"/yarn-daemon.sh --config $YARN_CONF_DIR  stop resourcemanager
 # stop nodeManager

hadoop-mapreduce-project/hadoop-yarn/bin/yarn

@@ -44,7 +44,9 @@
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
 
 cygwin=false
 case "`uname`" in

hadoop-mapreduce-project/hadoop-yarn/bin/yarn-daemon.sh

@@ -39,7 +39,9 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
 
 # get arguments
 startStop=$1

hadoop-mapreduce-project/hadoop-yarn/bin/yarn-daemons.sh

@@ -30,7 +30,9 @@ fi
 bin=`dirname "${BASH_SOURCE-$0}"`
 bin=`cd "$bin"; pwd`
 
-. $bin/yarn-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/yarn-config.sh
 
 exec "$bin/slaves.sh" --config $YARN_CONF_DIR cd "$YARN_HOME" \; "$bin/yarn-daemon.sh" --config $YARN_CONF_DIR "$@"
 

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/pom.xml

@@ -82,7 +82,7 @@
             <goals>
               <goal>jar</goal>
             </goals>
-            <!-- strictly speaking, the unit test is really a regression test. It 
+            <!-- strictly speaking, the unit test is really a regression test. It
                  needs the main jar to be available to be able to run. -->
             <phase>test-compile</phase>
           </execution>
@@ -109,9 +109,6 @@
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-surefire-plugin</artifactId>
         <configuration>
-          <systemPropertyVariables>
-            <yarn.ds.jar>${project.build.directory}/${project.artifactId}-${project.version}.jar</yarn.ds.jar>
-          </systemPropertyVariables>
           <environmentVariables>
             <JAVA_HOME>${java.home}</JAVA_HOME>
           </environmentVariables>

hadoop-mapreduce-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-applications-distributedshell/src/test/java/org/apache/hadoop/yarn/applications/distributedshell/TestDistributedShell.java

@@ -23,7 +23,7 @@ import java.io.IOException;
 import org.apache.commons.logging.Log;
 import org.apache.commons.logging.LogFactory;
 import org.apache.hadoop.conf.Configuration;
-import org.apache.hadoop.mapred.JobConf;
+import org.apache.hadoop.util.JarFinder;
 import org.apache.hadoop.yarn.server.MiniYARNCluster;
 import org.junit.AfterClass;
 import org.junit.BeforeClass;
@@ -37,8 +37,7 @@ public class TestDistributedShell {
   protected static MiniYARNCluster yarnCluster = null;
   protected static Configuration conf = new Configuration();
 
-  protected static String APPMASTER_JAR = System.getProperty("yarn.ds.jar",
-      JobConf.findContainingJar(ApplicationMaster.class));
+  protected static String APPMASTER_JAR = JarFinder.getJar(ApplicationMaster.class);
 
   @BeforeClass
   public static void setup() throws InterruptedException, IOException {

hadoop-mapreduce-project/src/contrib/raid/bin/start-raidnode-remote.sh

@@ -24,7 +24,9 @@ params=$#
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # get arguments
 if [ $# -ge 1 ]; then

hadoop-mapreduce-project/src/contrib/raid/bin/start-raidnode.sh

@@ -25,7 +25,9 @@ params=$#
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # get arguments
 if [ $# -ge 1 ]; then

hadoop-mapreduce-project/src/contrib/raid/bin/stop-raidnode-remote.sh

@@ -24,7 +24,9 @@ params=$#
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # get arguments
 if [ $# -ge 1 ]; then

hadoop-mapreduce-project/src/contrib/raid/bin/stop-raidnode.sh

@@ -25,7 +25,9 @@ params=$#
 bin=`dirname "$0"`
 bin=`cd "$bin"; pwd`
 
-. "$bin"/hadoop-config.sh
+DEFAULT_LIBEXEC_DIR="$bin"
+HADOOP_LIBEXEC_DIR=${HADOOP_LIBEXEC_DIR:-$DEFAULT_LIBEXEC_DIR}
+. $HADOOP_LIBEXEC_DIR/hadoop-config.sh
 
 # get arguments
 if [ $# -ge 1 ]; then

hadoop-mapreduce-project/src/examples/python/compile

@@ -12,7 +12,7 @@
 #   limitations under the License.
 
 
-export HADOOP_PREFIX=../../..
+export HADOOP_PREFIX=${HADOOP_PREFIX:-../../..}
 
 export CLASSPATH="$HADOOP_PREFIX/build/classes"
 

hadoop-mapreduce-project/src/examples/python/pyAbacus/compile

@@ -12,7 +12,7 @@
 #   limitations under the License.
 
 
-export HADOOP_PREFIX=../../../../..
+export HADOOP_PREFIX=${HADOOP_PREFIX:-../../../../..}
 
 export CLASSPATH="$HADOOP_PREFIX/build/classes"
 export CLASSPATH=${CLASSPATH}:"$HADOOP_PREFIX/build/contrib/abacus/classes"

hadoop-mapreduce-project/src/packages/deb/init.d/hadoop-historyserver

@@ -67,7 +67,7 @@ check_privsep_dir() {
 }
 
 export PATH="${PATH:+$PATH:}/usr/sbin:/usr/bin"
-export HADOOP_PREFIX="/usr"
+export HADOOP_PREFIX=${HADOOP_PREFIX:-/usr}
 
 case "$1" in
   start)

hadoop-mapreduce-project/src/packages/rpm/init.d/hadoop-historyserver

@@ -27,7 +27,7 @@ source /etc/default/hadoop-env.sh
 RETVAL=0
 PIDFILE="${HADOOP_PID_DIR}/hadoop-mapred-historyserver.pid"
 desc="Hadoop historyserver daemon"
-export HADOOP_PREFIX="/usr"
+export HADOOP_PREFIX=${HADOOP_PREFIX:-/usr}
 
 start() {
   echo -n $"Starting $desc (hadoop-historyserver): "

pom.xml

@@ -264,7 +264,7 @@
                 <configuration>
                   <appendAssemblyId>false</appendAssemblyId>
                   <attach>false</attach>
-                  <finalName>hadoop-dist-${project.version}-src</finalName>
+                  <finalName>hadoop-${project.version}-src</finalName>
                   <outputDirectory>hadoop-dist/target</outputDirectory>
                   <!-- Not using descriptorRef and hadoop-assembly dependency -->
                   <!-- to avoid making hadoop-main to depend on a module      -->
@@ -288,7 +288,7 @@
                 <configuration>
                   <target>
                     <echo/>
-                    <echo>Hadoop source tar available at: ${basedir}/hadoop-dist/target/hadoop-dist-${project.version}-src.tar.gz</echo>
+                    <echo>Hadoop source tar available at: ${basedir}/hadoop-dist/target/hadoop-${project.version}-src.tar.gz</echo>
                     <echo/>
                   </target>
                 </configuration>