Question : problem killing a session in java

i have started an http session in a web application on login with the following code:

HttpSession session = request.getSession(true);(written in Login Servlet.java)

after login,i start a particular process for eg: excute a sql query on the database. As the query is getting executed i logout of the application.

on logout to kill the session i have written the following code:
HttpSession session = request.getSession();     ------ when i print the session id after this line i get an id.
session.invalidate();
response.sendRedirect(request.getContextPath() + "/login.jsp. (written in LogoutServlet.java)

but the backend sql execution does not stop even after logging out. the application is redirected to the login page though.

Answer : problem killing a session in java

can you post the the code making the query you want to kill