Terracotta Server 4.3 is the latest release of Open Source edition of the Terracotta Server. It includes Ehcache 2.10.0
Terracotta Server 4.3 includes the following capabilities
4984 - Port 9520 is no longer valid. Actual IP address will show versus the loopback one.
5557 - When large number of clients simultaneously connect with the TSA server it could result in NullPointerException and server gets terminated.
5737 - Error message when trying to start servers in active-active mode does not give meaningful information.