Branch 2.7.4

.gitattributes

@@ -0,0 +1,20 @@
+# Auto detect text files and perform LF normalization
+*        text=auto
+
+*.cs     text diff=csharp
+*.java   text diff=java
+*.html   text diff=html
+*.py     text diff=python
+*.pl     text diff=perl
+*.pm     text diff=perl
+*.css    text
+*.js     text
+*.sql    text
+
+*.sh     text eol=lf
+
+*.bat    text eol=crlf
+*.cmd    text eol=crlf
+*.vcxproj text merge=union eol=crlf
+*.csproj text merge=union eol=crlf
+*.sln    text merge=union eol=crlf

.gitignore

@@ -1,9 +1,31 @@
+.DS_Store
 *.iml
 *.ipr
 *.iws
+*.orig
+*.rej
+**/.keep
+*.sdf
+*.suo
+*.vcxproj.user
 .idea
 .svn
 .classpath
 .project
 .settings
 target
+build
+
+# External tool builders
+*/.externalToolBuilders
+*/maven-eclipse.xml
+
+hadoop-common-project/hadoop-kms/downloads/
+hadoop-hdfs-project/hadoop-hdfs/downloads
+hadoop-hdfs-project/hadoop-hdfs-httpfs/downloads
+hadoop-common-project/hadoop-common/src/test/resources/contract-test-options.xml
+hadoop-tools/hadoop-openstack/src/test/resources/contract-test-options.xml
+hadoop-yarn-project/hadoop-yarn/hadoop-yarn-registry/src/main/tla/yarnregistry.toolbox
+yarnregistry.pdf
+hadoop-tools/hadoop-aws/src/test/resources/contract-test-options.xml
+patchprocess/

BUILDING.txt

@@ -1,27 +1,60 @@
-
-Build instructions for Hadoop Common/HDFS using Maven
+Build instructions for Hadoop
 
 ----------------------------------------------------------------------------------
 Requirements:
 
 * Unix System
-* JDK 1.6
-* Maven 3.0
-* Forrest 0.8 (if generating docs)
+* JDK 1.7+
+* Maven 3.0 or later
 * Findbugs 1.3.9 (if running findbugs)
-* Autotools (if compiling native code)
+* ProtocolBuffer 2.5.0
+* CMake 2.6 or newer (if compiling native code), must be 3.0 or newer on Mac
+* Zlib devel (if compiling native code)
+* openssl devel ( if compiling native hadoop-pipes and to get the best HDFS encryption performance )
+* Linux FUSE (Filesystem in Userspace) version 2.6 or above ( if compiling fuse_dfs )
 * Internet connection for first build (to fetch all Maven and Hadoop dependencies)
 
 ----------------------------------------------------------------------------------
-Maven modules:
+Installing required packages for clean install of Ubuntu 14.04 LTS Desktop:
+
+* Oracle JDK 1.7 (preferred)
+  $ sudo apt-get purge openjdk*
+  $ sudo apt-get install software-properties-common
+  $ sudo add-apt-repository ppa:webupd8team/java
+  $ sudo apt-get update
+  $ sudo apt-get install oracle-java7-installer
+* Maven
+  $ sudo apt-get -y install maven
+* Native libraries
+  $ sudo apt-get -y install build-essential autoconf automake libtool cmake zlib1g-dev pkg-config libssl-dev
+* ProtocolBuffer 2.5.0 (required)
+  $ sudo apt-get -y install libprotobuf-dev protobuf-compiler
+
+Optional packages:
+
+* Snappy compression
+  $ sudo apt-get install snappy libsnappy-dev
+* Bzip2
+  $ sudo apt-get install bzip2 libbz2-dev
+* Jansson (C Library for JSON)
+  $ sudo apt-get install libjansson-dev
+* Linux FUSE
+  $ sudo apt-get install fuse libfuse-dev
+
+----------------------------------------------------------------------------------
+Maven main modules:
 
-  hadoop                       (Main Hadoop project)
-         - hadoop-project      (Parent POM for all Hadoop Maven modules.             )
-                               (All plugins & dependencies versions are defined here.)
-         - hadoop-project-dist (Parent POM for modules that generate distributions.)
-         - hadoop-annotations  (Generates the Hadoop doclet used to generated the Javadocs)
-         - hadoop-common       (Hadoop Common)
-         - hadoop-hdfs         (Hadoop HDFS)
+  hadoop                            (Main Hadoop project)
+         - hadoop-project           (Parent POM for all Hadoop Maven modules.             )
+                                    (All plugins & dependencies versions are defined here.)
+         - hadoop-project-dist      (Parent POM for modules that generate distributions.)
+         - hadoop-annotations       (Generates the Hadoop doclet used to generated the Javadocs)
+         - hadoop-assemblies        (Maven assemblies used by the different modules)
+         - hadoop-common-project    (Hadoop Common)
+         - hadoop-hdfs-project      (Hadoop HDFS)
+         - hadoop-mapreduce-project (Hadoop MapReduce)
+         - hadoop-tools             (Hadoop tools like Streaming, Distcp, etc.)
+         - hadoop-dist              (Hadoop distribution assembler)
 
 ----------------------------------------------------------------------------------
 Where to run Maven from?
@@ -45,22 +78,231 @@ Maven build goals:
  * Run Rat                   : mvn apache-rat:check
  * Build javadocs            : mvn javadoc:javadoc
  * Build distribution        : mvn package [-Pdist][-Pdocs][-Psrc][-Pnative][-Dtar]
+ * Change Hadoop version     : mvn versions:set -DnewVersion=NEWVERSION
 
  Build options:
 
   * Use -Pnative to compile/bundle native code
-  * Use -Dsnappy.prefix=(/usr/local) & -Dbundle.snappy=(false) to compile
-    Snappy JNI bindings and to bundle Snappy SO files
   * Use -Pdocs to generate & bundle the documentation in the distribution (using -Pdist)
-  * Use -Psrc to bundle the source in the distribution (using -Pdist)
+  * Use -Psrc to create a project source TAR.GZ
   * Use -Dtar to create a TAR with the distribution (using -Pdist)
 
+ Snappy build options:
+
+   Snappy is a compression library that can be utilized by the native code.
+   It is currently an optional component, meaning that Hadoop can be built with
+   or without this dependency.
+
+  * Use -Drequire.snappy to fail the build if libsnappy.so is not found.
+    If this option is not specified and the snappy library is missing,
+    we silently build a version of libhadoop.so that cannot make use of snappy.
+    This option is recommended if you plan on making use of snappy and want
+    to get more repeatable builds.
+
+  * Use -Dsnappy.prefix to specify a nonstandard location for the libsnappy
+    header files and library files. You do not need this option if you have
+    installed snappy using a package manager.
+  * Use -Dsnappy.lib to specify a nonstandard location for the libsnappy library
+    files.  Similarly to snappy.prefix, you do not need this option if you have
+    installed snappy using a package manager.
+  * Use -Dbundle.snappy to copy the contents of the snappy.lib directory into
+    the final tar file. This option requires that -Dsnappy.lib is also given,
+    and it ignores the -Dsnappy.prefix option.
+
+ OpenSSL build options:
+
+   OpenSSL includes a crypto library that can be utilized by the native code.
+   It is currently an optional component, meaning that Hadoop can be built with
+   or without this dependency.
+
+  * Use -Drequire.openssl to fail the build if libcrypto.so is not found.
+    If this option is not specified and the openssl library is missing,
+    we silently build a version of libhadoop.so that cannot make use of
+    openssl. This option is recommended if you plan on making use of openssl
+    and want to get more repeatable builds.
+  * Use -Dopenssl.prefix to specify a nonstandard location for the libcrypto
+    header files and library files. You do not need this option if you have
+    installed openssl using a package manager.
+  * Use -Dopenssl.lib to specify a nonstandard location for the libcrypto library
+    files. Similarly to openssl.prefix, you do not need this option if you have
+    installed openssl using a package manager.
+  * Use -Dbundle.openssl to copy the contents of the openssl.lib directory into
+    the final tar file. This option requires that -Dopenssl.lib is also given,
+    and it ignores the -Dopenssl.prefix option.
+
    Tests options:
 
   * Use -DskipTests to skip tests when running the following Maven goals:
     'package',  'install', 'deploy' or 'verify'
-  * -Dtest=<TESTCLASSNAME>,....
+  * -Dtest=<TESTCLASSNAME>,<TESTCLASSNAME#METHODNAME>,....
   * -Dtest.exclude=<TESTCLASSNAME>
   * -Dtest.exclude.pattern=**/<TESTCLASSNAME1>.java,**/<TESTCLASSNAME2>.java
 
 ----------------------------------------------------------------------------------
+Building components separately
+
+If you are building a submodule directory, all the hadoop dependencies this
+submodule has will be resolved as all other 3rd party dependencies. This is,
+from the Maven cache or from a Maven repository (if not available in the cache
+or the SNAPSHOT 'timed out').
+An alternative is to run 'mvn install -DskipTests' from Hadoop source top
+level once; and then work from the submodule. Keep in mind that SNAPSHOTs
+time out after a while, using the Maven '-nsu' will stop Maven from trying
+to update SNAPSHOTs from external repos.
+
+----------------------------------------------------------------------------------
+Protocol Buffer compiler
+
+The version of Protocol Buffer compiler, protoc, must match the version of the
+protobuf JAR.
+
+If you have multiple versions of protoc in your system, you can set in your
+build shell the HADOOP_PROTOC_PATH environment variable to point to the one you
+want to use for the Hadoop build. If you don't define this environment variable,
+protoc is looked up in the PATH.
+----------------------------------------------------------------------------------
+Importing projects to eclipse
+
+When you import the project to eclipse, install hadoop-maven-plugins at first.
+
+  $ cd hadoop-maven-plugins
+  $ mvn install
+
+Then, generate eclipse project files.
+
+  $ mvn eclipse:eclipse -DskipTests
+
+At last, import to eclipse by specifying the root directory of the project via
+[File] > [Import] > [Existing Projects into Workspace].
+
+----------------------------------------------------------------------------------
+Building distributions:
+
+Create binary distribution without native code and without documentation:
+
+  $ mvn package -Pdist -DskipTests -Dtar
+
+Create binary distribution with native code and with documentation:
+
+  $ mvn package -Pdist,native,docs -DskipTests -Dtar
+
+Create source distribution:
+
+  $ mvn package -Psrc -DskipTests
+
+Create source and binary distributions with native code and documentation:
+
+  $ mvn package -Pdist,native,docs,src -DskipTests -Dtar
+
+Create a local staging version of the website (in /tmp/hadoop-site)
+
+  $ mvn clean site; mvn site:stage -DstagingDirectory=/tmp/hadoop-site
+
+----------------------------------------------------------------------------------
+Installing Hadoop
+
+Look for these HTML files after you build the document by the above commands.
+
+  * Single Node Setup:
+    hadoop-project-dist/hadoop-common/SingleCluster.html
+
+  * Cluster Setup:
+    hadoop-project-dist/hadoop-common/ClusterSetup.html
+
+----------------------------------------------------------------------------------
+
+Handling out of memory errors in builds
+
+----------------------------------------------------------------------------------
+
+If the build process fails with an out of memory error, you should be able to fix
+it by increasing the memory used by maven -which can be done via the environment
+variable MAVEN_OPTS.
+
+Here is an example setting to allocate between 256 and 512 MB of heap space to
+Maven
+
+export MAVEN_OPTS="-Xms256m -Xmx512m"
+
+----------------------------------------------------------------------------------
+
+Building on Windows
+
+----------------------------------------------------------------------------------
+Requirements:
+
+* Windows System
+* JDK 1.7+
+* Maven 3.0 or later
+* Findbugs 1.3.9 (if running findbugs)
+* ProtocolBuffer 2.5.0
+* CMake 2.6 or newer
+* Windows SDK 7.1 or Visual Studio 2010 Professional
+* Windows SDK 8.1 (if building CPU rate control for the container executor)
+* zlib headers (if building native code bindings for zlib)
+* Internet connection for first build (to fetch all Maven and Hadoop dependencies)
+* Unix command-line tools from GnuWin32: sh, mkdir, rm, cp, tar, gzip. These
+  tools must be present on your PATH.
+
+Unix command-line tools are also included with the Windows Git package which
+can be downloaded from http://git-scm.com/download/win.
+
+If using Visual Studio, it must be Visual Studio 2010 Professional (not 2012).
+Do not use Visual Studio Express.  It does not support compiling for 64-bit,
+which is problematic if running a 64-bit system.  The Windows SDK 7.1 is free to
+download here:
+
+http://www.microsoft.com/en-us/download/details.aspx?id=8279
+
+The Windows SDK 8.1 is available to download at:
+
+http://msdn.microsoft.com/en-us/windows/bg162891.aspx
+
+Cygwin is neither required nor supported.
+
+----------------------------------------------------------------------------------
+Building:
+
+Keep the source code tree in a short path to avoid running into problems related
+to Windows maximum path length limitation.  (For example, C:\hdc).
+
+Run builds from a Windows SDK Command Prompt.  (Start, All Programs,
+Microsoft Windows SDK v7.1, Windows SDK 7.1 Command Prompt.)
+
+JAVA_HOME must be set, and the path must not contain spaces.  If the full path
+would contain spaces, then use the Windows short path instead.
+
+You must set the Platform environment variable to either x64 or Win32 depending
+on whether you're running a 64-bit or 32-bit system.  Note that this is
+case-sensitive.  It must be "Platform", not "PLATFORM" or "platform".
+Environment variables on Windows are usually case-insensitive, but Maven treats
+them as case-sensitive.  Failure to set this environment variable correctly will
+cause msbuild to fail while building the native code in hadoop-common.
+
+set Platform=x64 (when building on a 64-bit system)
+set Platform=Win32 (when building on a 32-bit system)
+
+Several tests require that the user must have the Create Symbolic Links
+privilege.
+
+All Maven goals are the same as described above with the exception that
+native code is built by enabling the 'native-win' Maven profile. -Pnative-win
+is enabled by default when building on Windows since the native components
+are required (not optional) on Windows.
+
+If native code bindings for zlib are required, then the zlib headers must be
+deployed on the build machine.  Set the ZLIB_HOME environment variable to the
+directory containing the headers.
+
+set ZLIB_HOME=C:\zlib-1.2.7
+
+At runtime, zlib1.dll must be accessible on the PATH.  Hadoop has been tested
+with zlib 1.2.7, built using Visual Studio 2010 out of contrib\vstudio\vc10 in
+the zlib 1.2.7 source tree.
+
+http://www.zlib.net/
+
+----------------------------------------------------------------------------------
+Building distributions:
+
+ * Build distribution with native code    : mvn package [-Pdist][-Pdocs][-Psrc][-Dtar]