Samza's code is in an Apache Git repository located here.
You can check out Samza's code by running:
git clone http://git-wip-us.apache.org/repos/asf/samza.git
Please see the Rules page for information on how to contribute.
If you are a committer you need to use https instead of http to check in, otherwise you will get an error regarding an inability to acquire a lock. Note that older versions of git may also give this error even when the repo was cloned with https; if you experience this try a newer version of git.
The Samza website is built by Jekyll from the markdown files found in the docs subdirectory. For committers wishing to update the webpage, please see docs/README.md for instructions.