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Community

Getting and keeping in touch

Mailing lists

Discussion and questions on Cassandra's usage and development happens mainly on the following mailing lists:

• Users: General mailing list for user questions and discussions. This is also where new releases are announced (subscribe | unsubscribe | Archives).
• Developers: Questions and discussions related to Cassandra development (subscribe | unsubscribe | Archives).
• Commits: Notification on commits done to the source repository and on JIRA updates. This is a fairly noisy mailing list mostly useful for Cassandra developers and those who would like to keep close tabs on Cassandra's development (subscribe | unsubscribe | Archives).

IRC

To chat with developers or users in real-time, join our channels on IRC freenode:

• #cassandra - for user questions and general discussions.
• #cassandra-dev - strictly for questions or discussions related to Cassandra development.
• #cassandra-builds - results of automated test builds.

Stack Overflow

You can also check the Q&A about using Cassandra on Stack Overflow.

News, articles and user groups

You can find a number of news, articles and use cases, as well a links to Cassandra user groups on the Planet Cassandra (not endorsed by Apache).

Dead Trees

• Cassandra: The Definitive Guide, 2nd Edition, by Jeff Carpenter and Eben Hewitt. Updated for Cassandra 3.0

Reporting bugs

If you encounter a problem with Cassandra, the first places to ask for help are the user mailing list and the #cassandra IRC channel.

If, after having asked for help, you suspect that you have found a bug in Cassandra, you should report it by opening a ticket through the Apache Cassandra JIRA. Please provide as much details as you can on your problem, and don't forget to indicate which version of Cassandra you are running and on which environment.