Why is spawning threads in Java EE container discouraged?

Question

One of the first things I\'ve learned about Java EE development is that I shouldn\'t spawn my own threads inside a Java EE container. But when I come to think about it, I do

Answer 1

One reason I have found if you spawn some threads in you EJB and then you try to have the container unload or update your EJB you are going to run into problems. There is almost always another way to do something where you don't need a Thread so just say NO.