servlet使用request.getRequestDispatcher("/MyCart").forward(request, response)出错

[clc116122]

运行出错为：The web application [myCart] is still processing a request that has yet to finish. This is very likely to create a memory leak. You can control the time allowed for requests to finish by using the unloadDelay attribute of the standard Context implementation. Stack trace of request processing thread
使用的时tomcat9 jdk1.8
在本页面中使用了request.getSession().getAttribute（“name”），然后在使用forward出的错。