What are the required C3P0 settings for hibernate in order to avoid Deadlocks

Question

I use Hibernate together with MySQL 5.1.30.

I have the next libraries:

• c3p0-0.0.1.2.jar
• mysql-connector-java-5.0.3

Answer 1

That's a pretty old version of Connector/J. To make sure you're not battling a known and fixed bug, I'd start by getting the newest one (5.0.8):

http://dev.mysql.com/downloads/connector/j/5.0.html

That EOFException from MysqlIO is a bit suspicious. Under normal/non-buggy usage, you shouldn't ever get errors from that layer.