Async Servlet Exception

Question

I'm new to JavaEE 6 and I learnt that it support asynchronous servlets called AsyncServlets. So I tried to create a small program using JavaEE6. Here is my code for the servlet ``` @WebServlet(name = "AsyncServlet", urlPatterns = {"/AsyncServlet"}, asyncSupported=true) public class AsyncServlet extends HttpServlet { @Override protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { AsyncContext aCtx = request.startAsync(request, response); Executor executor = Executors.newSingleThreadExecutor(); executor.execute(new MyClass(aCtx)); System.out.println("Original thread is freed"); } } ``` But when I try to run the servlet I get an exception java.lang.IllegalStateException: Not supported. I'm using tomcat 7.0.14 as the server. i did not create a web.xml. Where is the problem in this code? EDIT: This is the full stack-trace of the exception ``` SEVERE: Servlet.service() for servlet [AsyncServlet] in context with path [/AsyncTest…

Accepted Answer

if you use tomcat as your web server then you should maintion that you are going to use asyc request to tomcat

before start async request put this line code

```
request.setAttribute("org.apache.catalina.ASYNC_SUPPORTED", true);
```

i hope you can get what u want from it

Async Servlet Exception

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