...
Contributors should join the Sentry mailing lists. In particular, the commits@sentry.incubator.apache.org list (to see changes as they are made), the dev@sentry.incubator.apache.org list (to join discussions of changes).
...
Disclaimer
Apache Sentry is an effort undergoing incubation at The Apache Software Foundation (ASF), sponsored by the name of Apache TLP sponsor. Incubation is required of all newly accepted projects until a further review indicates that the infrastructure, communications, and decision making process have stabilized in a manner consistent with other successful ASF projects. While incubation status is not necessarily a reflection of the completeness or stability of the code, it does indicate that the project has yet to be fully endorsed by the ASF.