Build instructions for Hadoop ---------------------------------------------------------------------------------- Requirements: * Unix System * JDK 1.8 * Maven 3.3 or later * Boost 1.72 (if compiling native code) * Protocol Buffers 3.7.1 (if compiling native code) * CMake 3.19 or newer (if compiling native code) * Zlib devel (if compiling native code) * Cyrus SASL devel (if compiling native code) * One of the compilers that support thread_local storage: GCC 9.3.0 or later, Visual Studio, Clang (community version), Clang (version for iOS 9 and later) (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) * Doxygen ( if compiling libhdfspp and generating the documents ) * Internet connection for first build (to fetch all Maven and Hadoop dependencies) * python (for releasedocs) * bats (for shell code testing) * Node.js / bower / Ember-cli (for YARN UI v2 building) ---------------------------------------------------------------------------------- The easiest way to get an environment with all the appropriate tools is by means of the provided Docker config. This requires a recent version of docker (1.4.1 and higher are known to work). On Linux / Mac: Install Docker and run this command: $ ./start-build-env.sh The prompt which is then presented is located at a mounted version of the source tree and all required tools for testing and building have been installed and configured. Note that from within this docker environment you ONLY have access to the Hadoop source tree from where you started. So if you need to run dev-support/bin/test-patch /path/to/my.patch then the patch must be placed inside the hadoop source tree. Known issues: - On Mac with Boot2Docker the performance on the mounted directory is currently extremely slow. This is a known problem related to boot2docker on the Mac. See: https://github.com/boot2docker/boot2docker/issues/593 This issue has been resolved as a duplicate, and they point to a new feature for utilizing NFS mounts as the proposed solution: https://github.com/boot2docker/boot2docker/issues/64 An alternative solution to this problem is to install Linux native inside a virtual machine and run your IDE and Docker etc inside that VM. ---------------------------------------------------------------------------------- Installing required packages for clean install of Ubuntu 18.04 LTS Desktop. (For Ubuntu 20.04, gcc/g++ and cmake bundled with Ubuntu can be used. Refer to dev-support/docker/Dockerfile): * Open JDK 1.8 $ sudo apt-get update $ sudo apt-get -y install openjdk-8-jdk * 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 libsasl2-dev * GCC 9.3.0 $ sudo apt-get -y install software-properties-common $ sudo add-apt-repository -y ppa:ubuntu-toolchain-r/test $ sudo apt-get update $ sudo apt-get -y install g++-9 gcc-9 $ sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 60 --slave /usr/bin/g++ g++ /usr/bin/g++-9 * CMake 3.19 $ curl -L https://cmake.org/files/v3.19/cmake-3.19.0.tar.gz > cmake-3.19.0.tar.gz $ tar -zxvf cmake-3.19.0.tar.gz && cd cmake-3.19.0 $ ./bootstrap $ make -j$(nproc) $ sudo make install * Protocol Buffers 3.7.1 (required to build native code) $ curl -L -s -S https://github.com/protocolbuffers/protobuf/releases/download/v3.7.1/protobuf-java-3.7.1.tar.gz -o protobuf-3.7.1.tar.gz $ mkdir protobuf-3.7-src $ tar xzf protobuf-3.7.1.tar.gz --strip-components 1 -C protobuf-3.7-src && cd protobuf-3.7-src $ ./configure $ make -j$(nproc) $ sudo make install * Boost $ curl -L https://sourceforge.net/projects/boost/files/boost/1.72.0/boost_1_72_0.tar.bz2/download > boost_1_72_0.tar.bz2 $ tar --bzip2 -xf boost_1_72_0.tar.bz2 && cd boost_1_72_0 $ ./bootstrap.sh --prefix=/usr/ $ ./b2 --without-python $ sudo ./b2 --without-python install Optional packages: * Snappy compression (only used for hadoop-mapreduce-client-nativetask) $ sudo apt-get install libsnappy-dev * Intel ISA-L library for erasure coding Please refer to https://01.org/intel%C2%AE-storage-acceleration-library-open-source-version (OR https://github.com/01org/isa-l) * Bzip2 $ sudo apt-get install bzip2 libbz2-dev * Linux FUSE $ sudo apt-get install fuse libfuse-dev * ZStandard compression $ sudo apt-get install libzstd1-dev * PMDK library for storage class memory(SCM) as HDFS cache backend Please refer to http://pmem.io/ and https://github.com/pmem/pmdk ---------------------------------------------------------------------------------- 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 generate the Javadocs) - hadoop-assemblies (Maven assemblies used by the different modules) - hadoop-maven-plugins (Maven plugins used in project) - hadoop-build-tools (Build tools like checkstyle, etc.) - hadoop-common-project (Hadoop Common) - hadoop-hdfs-project (Hadoop HDFS) - hadoop-yarn-project (Hadoop YARN) - hadoop-mapreduce-project (Hadoop MapReduce) - hadoop-tools (Hadoop tools like Streaming, Distcp, etc.) - hadoop-dist (Hadoop distribution assembler) - hadoop-client-modules (Hadoop client modules) - hadoop-minicluster (Hadoop minicluster artifacts) - hadoop-cloud-storage-project (Generates artifacts to access cloud storage like aws, azure, etc.) ---------------------------------------------------------------------------------- Where to run Maven from? It can be run from any module. The only catch is that if not run from trunk all modules that are not part of the build run must be installed in the local Maven cache or available in a Maven repository. ---------------------------------------------------------------------------------- Maven build goals: * Clean : mvn clean [-Preleasedocs] * Compile : mvn compile [-Pnative] * Run tests : mvn test [-Pnative] [-Pshelltest] * Create JAR : mvn package * Run spotbugs : mvn compile spotbugs:spotbugs * Run checkstyle : mvn compile checkstyle:checkstyle * Install JAR in M2 cache : mvn install * Deploy JAR to Maven repo : mvn deploy * Run clover : mvn test -Pclover * Run Rat : mvn apache-rat:check * Build javadocs : mvn javadoc:javadoc * Build distribution : mvn package [-Pdist][-Pdocs][-Psrc][-Pnative][-Dtar][-Preleasedocs][-Pyarn-ui] * Change Hadoop version : mvn versions:set -DnewVersion=NEWVERSION Build options: * Use -Pnative to compile/bundle native code * Use -Pdocs to generate & bundle the documentation 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) * Use -Preleasedocs to include the changelog and release docs (requires Internet connectivity) * Use -Pyarn-ui to build YARN UI v2. (Requires Internet connectivity) * Use -DskipShade to disable client jar shading to speed up build times (in development environments only, not to build release artifacts) YARN Application Timeline Service V2 build options: YARN Timeline Service v.2 chooses Apache HBase as the primary backing storage. The supported versions of Apache HBase are 1.2.6 (default) and 2.0.0-beta1. * HBase 1.2.6 is used by default to build Hadoop. The official releases are ready to use if you plan on running Timeline Service v2 with HBase 1.2.6. * Use -Dhbase.profile=2.0 to build Hadoop with HBase 2.0.0-beta1. Provide this option if you plan on running Timeline Service v2 with HBase 2.0. 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. Snappy library as optional dependency is only used for hadoop-mapreduce-client-nativetask. * 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. If -Dsnappy.lib isn't given, the bundling and building will fail. ZStandard build options: ZStandard 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.zstd to fail the build if libzstd.so is not found. If this option is not specified and the zstd library is missing. * Use -Dzstd.prefix to specify a nonstandard location for the libzstd header files and library files. You do not need this option if you have installed zstandard using a package manager. * Use -Dzstd.lib to specify a nonstandard location for the libzstd library files. Similarly to zstd.prefix, you do not need this option if you have installed using a package manager. * Use -Dbundle.zstd to copy the contents of the zstd.lib directory into the final tar file. This option requires that -Dzstd.lib is also given, and it ignores the -Dzstd.prefix option. If -Dzstd.lib isn't given, the bundling and building will fail. 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. If -Dopenssl.lib isn't given, the bundling and building will fail. Tests options: * Use -DskipTests to skip tests when running the following Maven goals: 'package', 'install', 'deploy' or 'verify' * -Dtest=,,.... * -Dtest.exclude= * -Dtest.exclude.pattern=**/.java,**/.java * To run all native unit tests, use: mvn test -Pnative -Dtest=allNative * To run a specific native unit test, use: mvn test -Pnative -Dtest= For example, to run test_bulk_crc32, you would use: mvn test -Pnative -Dtest=test_bulk_crc32 Intel ISA-L build options: Intel ISA-L is an erasure coding 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. Note the library is used via dynamic module. Please reference the official site for the library details. https://01.org/intel%C2%AE-storage-acceleration-library-open-source-version (OR https://github.com/01org/isa-l) * Use -Drequire.isal to fail the build if libisal.so is not found. If this option is not specified and the isal library is missing, we silently build a version of libhadoop.so that cannot make use of ISA-L and the native raw erasure coders. This option is recommended if you plan on making use of native raw erasure coders and want to get more repeatable builds. * Use -Disal.prefix to specify a nonstandard location for the libisal library files. You do not need this option if you have installed ISA-L to the system library path. * Use -Disal.lib to specify a nonstandard location for the libisal library files. * Use -Dbundle.isal to copy the contents of the isal.lib directory into the final tar file. This option requires that -Disal.lib is also given, and it ignores the -Disal.prefix option. If -Disal.lib isn't given, the bundling and building will fail. Special plugins: OWASP's dependency-check: OWASP's dependency-check plugin will scan the third party dependencies of this project for known CVEs (security vulnerabilities against them). It will produce a report in target/dependency-check-report.html. To invoke, run 'mvn dependency-check:aggregate'. Note that this plugin requires maven 3.1.1 or greater. PMDK library build options: The Persistent Memory Development Kit (PMDK), formerly known as NVML, is a growing collection of libraries which have been developed for various use cases, tuned, validated to production quality, and thoroughly documented. These libraries are built on the Direct Access (DAX) feature available in both Linux and Windows, which allows applications directly load/store access to persistent memory by memory-mapping files on a persistent memory aware file system. It is currently an optional component, meaning that Hadoop can be built without this dependency. Please Note the library is used via dynamic module. For getting more details please refer to the official sites: http://pmem.io/ and https://github.com/pmem/pmdk. * -Drequire.pmdk is used to build the project with PMDK libraries forcibly. With this option provided, the build will fail if libpmem library is not found. If this option is not given, the build will generate a version of Hadoop with libhadoop.so. And storage class memory(SCM) backed HDFS cache is still supported without PMDK involved. Because PMDK can bring better caching write/read performance, it is recommended to build the project with this option if user plans to use SCM backed HDFS cache. * -Dpmdk.lib is used to specify a nonstandard location for PMDK libraries if they are not under /usr/lib or /usr/lib64. * -Dbundle.pmdk is used to copy the specified libpmem libraries into the distribution tar package. This option requires that -Dpmdk.lib is specified. With -Dbundle.pmdk provided, the build will fail if -Dpmdk.lib is not specified. ---------------------------------------------------------------------------------- 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. ---------------------------------------------------------------------------------- Importing projects to eclipse At first, install artifacts including hadoop-maven-plugins at the top of the source tree. $ mvn clean install -DskipTests -DskipShade Then, import to eclipse by specifying the root directory of the project via [File] > [Import] > [Maven] > [Existing Maven Projects]. ---------------------------------------------------------------------------------- Building distributions: Create binary distribution without native code and without Javadocs: $ mvn package -Pdist -DskipTests -Dtar -Dmaven.javadoc.skip=true Create binary distribution with native code: $ mvn package -Pdist,native -DskipTests -Dtar Create source distribution: $ mvn package -Psrc -DskipTests Create source and binary distributions with native code: $ mvn package -Pdist,native,src -DskipTests -Dtar Create a local staging version of the website (in /tmp/hadoop-site) $ mvn site site:stage -Preleasedocs,docs -DstagingDirectory=/tmp/hadoop-site Note that the site needs to be built in a second pass after other artifacts. ---------------------------------------------------------------------------------- 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 MB and 1.5 GB of heap space to Maven export MAVEN_OPTS="-Xms256m -Xmx1536m" ---------------------------------------------------------------------------------- Building on macOS (without Docker) ---------------------------------------------------------------------------------- Installing required dependencies for clean install of macOS 10.14: * Install Xcode Command Line Tools $ xcode-select --install * Install Homebrew $ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)" * Install OpenJDK 8 $ brew tap AdoptOpenJDK/openjdk $ brew cask install adoptopenjdk8 * Install maven and tools $ brew install maven autoconf automake cmake wget * Install native libraries, only openssl is required to compile native code, you may optionally install zlib, lz4, etc. $ brew install openssl * Protocol Buffers 3.7.1 (required to compile native code) $ wget https://github.com/protocolbuffers/protobuf/releases/download/v3.7.1/protobuf-java-3.7.1.tar.gz $ mkdir -p protobuf-3.7 && tar zxvf protobuf-java-3.7.1.tar.gz --strip-components 1 -C protobuf-3.7 $ cd protobuf-3.7 $ ./configure $ make $ make check $ make install $ protoc --version Note that building Hadoop 3.1.1/3.1.2/3.2.0 native code from source is broken on macOS. For 3.1.1/3.1.2, you need to manually backport YARN-8622. For 3.2.0, you need to backport both YARN-8622 and YARN-9487 in order to build native code. ---------------------------------------------------------------------------------- Building command example: * Create binary distribution with native code but without documentation: $ mvn package -Pdist,native -DskipTests -Dmaven.javadoc.skip \ -Dopenssl.prefix=/usr/local/opt/openssl Note that the command above manually specified the openssl library and include path. This is necessary at least for Homebrewed OpenSSL. ---------------------------------------------------------------------------------- Building on CentOS 8 ---------------------------------------------------------------------------------- * Install development tools such as GCC, autotools, OpenJDK and Maven. $ sudo dnf group install --with-optional 'Development Tools' $ sudo dnf install java-1.8.0-openjdk-devel maven * Install python2 for building documentation. $ sudo dnf install python2 * Install Protocol Buffers v3.7.1. $ git clone https://github.com/protocolbuffers/protobuf $ cd protobuf $ git checkout v3.7.1 $ autoreconf -i $ ./configure --prefix=/usr/local $ make $ sudo make install $ cd .. * Install libraries provided by CentOS 8. $ sudo dnf install libtirpc-devel zlib-devel lz4-devel bzip2-devel openssl-devel cyrus-sasl-devel libpmem-devel * Install GCC 9.3.0 $ sudo dnf -y install gcc-toolset-9-gcc gcc-toolset-9-gcc-c++ $ source /opt/rh/gcc-toolset-9/enable * Install CMake 3.19 $ curl -L https://cmake.org/files/v3.19/cmake-3.19.0.tar.gz > cmake-3.19.0.tar.gz $ tar -zxvf cmake-3.19.0.tar.gz && cd cmake-3.19.0 $ ./bootstrap $ make -j$(nproc) $ sudo make install * Install boost. $ curl -L -o boost_1_72_0.tar.bz2 https://sourceforge.net/projects/boost/files/boost/1.72.0/boost_1_72_0.tar.bz2/download $ tar xjf boost_1_72_0.tar.bz2 $ cd boost_1_72_0 $ ./bootstrap.sh --prefix=/usr/local $ ./b2 $ sudo ./b2 install * Install optional dependencies (snappy-devel). $ sudo dnf --enablerepo=PowerTools install snappy-devel * Install optional dependencies (libzstd-devel). $ sudo dnf install https://dl.fedoraproject.org/pub/epel/epel-release-latest-8.noarch.rpm $ sudo dnf --enablerepo=epel install libzstd-devel * Install optional dependencies (isa-l). $ sudo dnf --enablerepo=PowerTools install nasm $ git clone https://github.com/intel/isa-l $ cd isa-l/ $ ./autogen.sh $ ./configure $ make $ sudo make install ---------------------------------------------------------------------------------- Building on Windows 10 ---------------------------------------------------------------------------------- Requirements: * Windows 10 * JDK 1.8 * Maven 3.0 or later (maven.apache.org) * Boost 1.72 (boost.org) * Protocol Buffers 3.7.1 (https://github.com/protocolbuffers/protobuf/releases) * CMake 3.19 or newer (cmake.org) * Visual Studio 2019 (visualstudio.com) * Windows SDK 8.1 (optional, if building CPU rate control for the container executor. Get this from http://msdn.microsoft.com/en-us/windows/bg162891.aspx) * Zlib (zlib.net, if building native code bindings for zlib) * Git (preferably, get this from https://git-scm.com/download/win since the package also contains Unix command-line tools that are needed during packaging). * Python (python.org, for generation of docs using 'mvn site') * Internet connection for first build (to fetch all Maven and Hadoop dependencies) ---------------------------------------------------------------------------------- Building guidelines: Hadoop repository provides the Dockerfile for building Hadoop on Windows 10, located at dev-support/docker/Dockerfile_windows_10. It is highly recommended to use this and create the Docker image for building Hadoop on Windows 10, since you don't have to install anything else other than Docker and no additional steps are required in terms of aligning the environment with the necessary paths etc. However, if you still prefer taking the route of not using Docker, this Dockerfile_windows_10 will still be immensely useful as a raw guide for all the steps involved in creating the environment needed to build Hadoop on Windows 10. Building using the Docker: We first need to build the Docker image for building Hadoop on Windows 10. Run this command from the root of the Hadoop repository. > docker build -t hadoop-windows-10-builder -f .\dev-support\docker\Dockerfile_windows_10 .\dev-support\docker\ Start the container with the image that we just built. > docker run --rm -it hadoop-windows-10-builder You can now clone the Hadoop repo inside this container and proceed with the build. NOTE: While one may perceive the idea of mounting the locally cloned (on the host filesystem) Hadoop repository into the container (using the -v option), we have seen the build to fail owing to some files not being able to be located by Maven. Thus, we suggest cloning the Hadoop repository to a non-mounted folder inside the container and proceed with the build. When the build is completed, you may use the "docker cp" command to copy the built Hadoop tar.gz file from the docker container to the host filesystem. If you still would like to mount the Hadoop codebase, a workaround would be to copy the mounted Hadoop codebase into another folder (which doesn't point to a mount) in the container's filesystem and use this for building. However, we noticed no build issues when the Maven repository from the host filesystem was mounted into the container. One may use this to greatly reduce the build time. Assuming that the Maven repository is located at D:\Maven\Repository in the host filesystem, one can use the following command to mount the same onto the default Maven repository location while launching the container. > docker run --rm -v D:\Maven\Repository:C:\Users\ContainerAdministrator\.m2\repository -it hadoop-windows-10-builder 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). There is one support command file located in dev-support called win-paths-eg.cmd. It should be copied somewhere convenient and modified to fit your needs. win-paths-eg.cmd sets up the environment for use. You will need to modify this file. It will put all of the required components in the command path, configure the bit-ness of the build, and set several optional components. Several tests require that the user must have the Create Symbolic Links privilege. To simplify the installation of Boost, Protocol buffers, OpenSSL and Zlib dependencies we can use vcpkg (https://github.com/Microsoft/vcpkg.git). Upon cloning the vcpkg repo, checkout the commit 7ffa425e1db8b0c3edf9c50f2f3a0f25a324541d to get the required versions of the dependencies mentioned above. > git clone https://github.com/Microsoft/vcpkg.git > cd vcpkg > git checkout 7ffa425e1db8b0c3edf9c50f2f3a0f25a324541d > .\bootstrap-vcpkg.bat > .\vcpkg.exe install boost:x64-windows > .\vcpkg.exe install protobuf:x64-windows > .\vcpkg.exe install openssl:x64-windows > .\vcpkg.exe install zlib:x64-windows Set the following environment variables - (Assuming that vcpkg was checked out at C:\vcpkg) > set PROTOBUF_HOME=C:\vcpkg\installed\x64-windows > set MAVEN_OPTS=-Xmx2048M -Xss128M 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/ Build command: The following command builds all the modules in the Hadoop project and generates the tar.gz file in hadoop-dist/target upon successful build. Run these commands from an "x64 Native Tools Command Prompt for VS 2019" which can be found under "Visual Studio 2019" in the Windows start menu. If you're using the Docker image from Dockerfile_windows_10, you'll be logged into "x64 Native Tools Command Prompt for VS 2019" automatically when you start the container. > set classpath= > set PROTOBUF_HOME=C:\vcpkg\installed\x64-windows > mvn clean package -Dhttps.protocols=TLSv1.2 -DskipTests -DskipDocs -Pnative-win,dist^ -Drequire.openssl -Drequire.test.libhadoop -Pyarn-ui -Dshell-executable=C:\Git\bin\bash.exe^ -Dtar -Dopenssl.prefix=C:\vcpkg\installed\x64-windows^ -Dcmake.prefix.path=C:\vcpkg\installed\x64-windows^ -Dwindows.cmake.toolchain.file=C:\vcpkg\scripts\buildsystems\vcpkg.cmake -Dwindows.cmake.build.type=RelWithDebInfo^ -Dwindows.build.hdfspp.dll=off -Dwindows.no.sasl=on -Duse.platformToolsetVersion=v142 ---------------------------------------------------------------------------------- Building distributions: * Build distribution with native code : mvn package [-Pdist][-Pdocs][-Psrc][-Dtar][-Dmaven.javadoc.skip=true] ---------------------------------------------------------------------------------- Running compatibility checks with checkcompatibility.py Invoke `./dev-support/bin/checkcompatibility.py` to run Java API Compliance Checker to compare the public Java APIs of two git objects. This can be used by release managers to compare the compatibility of a previous and current release. As an example, this invocation will check the compatibility of interfaces annotated as Public or LimitedPrivate: ./dev-support/bin/checkcompatibility.py --annotation org.apache.hadoop.classification.InterfaceAudience.Public --annotation org.apache.hadoop.classification.InterfaceAudience.LimitedPrivate --include "hadoop.*" branch-2.7.2 trunk ---------------------------------------------------------------------------------- Changing the Hadoop version declared returned by VersionInfo If for compatibility reasons the version of Hadoop has to be declared as a 2.x release in the information returned by org.apache.hadoop.util.VersionInfo, set the property declared.hadoop.version to the desired version. For example: mvn package -Pdist -Ddeclared.hadoop.version=2.11 If unset, the project version declared in the POM file is used.