Single-Thread vs. Multithreaded Servlets

[cpope]

Can anyone explain an example of when a single threaded servlet should be used as opposed to the default multi-threaded servlet?

 

[wushutwist]

Single-threaded mode should be used when you want to insure that no more than one request will be processed by the servlet at any one time. Using Single-threaded mode relieves you of the duty of being a good programmer and making sure your Servlet is thread-safe. I can't think of any situation that would require this type of behavior. In 99% of all cases you should take the necessary precautions and insure your servlet functions correctly in multi-threaded mode. This means not using class instance variables to store results and other such precautions.

Oh yeah, single-threaded mode also serves to significantly decrease your performance. Wushutwist