Thread management in a Web application is forbidden in some
					circumstances and is always highly error prone.Thread management in a web application is forbidden by the J2EE standard
						in some circumstances and is always highly error prone. Managing threads is
						difficult and is likely to interfere in unpredictable ways with the behavior
						of the application container. Even without interfering with the container,
						thread management usually leads to bugs that are hard to detect and diagnose
						like deadlock, race conditions, and other synchronization errors.