MapR releases source code to the open-source community for enhancements that MapR has made to the Apache Hadoop project and other ecosystem components. MapR regularly releases updates to Apache Hadoop ecosystem projects as the projects are released by Apache, after MapR can verify that the changes do not impact product stability. Releases of ecosystem components are independent of the release cycle for the core MapR distribution for Hadoop, so that new updates can be released quickly and efficiently.
Source code developed by MapR can be found on GitHub at http://github.com/mapr as of March 2013, coincident with version 2.1.2 of the MapR distribution. MapR may also release source code for other MapR projects at github.com/mapr. For each release that MapR includes in its distribution, MapR branches and tags the release on GitHub using the underlying project release number appended by
Component Repositories on GitHub
The following repositories are available on GitHub for components that MapR has enhanced, patched, or created.
Finding Source Changes Prior to February 2013
GitHub is the single, central location for tracking changes that MapR applies to components in releases of the MapR distribution. Prior to February 2013, MapR included a list of patches in each component directory, as shown below. This information is no longer stored in the installation directory for recent releases, and instead is available at GitHub.