Apache Hadoop 2.6.6 Release Notes

These release notes cover new developer and user-facing incompatibilities, important issues, features, and major improvements.

Tomcat 6.0.46 starts to filter weak ciphers. Some old SSL clients may be affected. It is recommended to upgrade the SSL client. Run the SSL client against https://www.howsmyssl.com/a/check to find out its TLS version and cipher suites.