spring构架网站连接mysql登陆以后导致整个tomcat瘫痪

连接mysql数据库。登陆后报错

• Application exception overridden by rollback error java.lang.OutOfMemoryError: PermGen space Exception in thread "http-bio-8080-exec-4" Exception: java.lang.OutOfMemoryError thrown from the UncaughtExceptionHandler in thread "http-bio-8080-exec-4"