Does latest Cassandra support openJDK?
cassandra
Solution
I am sure DataStax does testing against OpenJDK, but it is a recommendation to use Sun JDK. There are several people on Community who use OpenJDK without problems but there are also some who do have a lot of problems with openJDK. If you read a few lines later where you started:
https://github.com/apache/cassandra/blame/trunk/src/java/org/apache/cassandra/service/CassandraDaemon.java#L119
You see one example that it warns about what may not work as intended if non-Sun-JDK is used. Those usually affect performance and GC. So, use OpenJDK at your own risk. Also latest version required Java 7.
Problem
On the GitHub Readme it says Tested on >=1.7 (OpenJSK and Sun). However, when I looked at `CassandraDaemon.java`, the warning that asks us to upgrade to Oracle Java still exists. Can someone comment on this ?