使用计时器任务重新部署单例

I have a web server application runing with JVM, where i manage the class loader. My application have an singleton with a cycle timertask. During the redeployment i clean all the references to Class(es). I look like that my singleton with the timerTask doen't die. I add a finalize method with print. the finalize method was never call. Any solution?I have a web server application runing with JVM