WAS 什么情况下会进行 unload servlet ??

[oract666]

When handling servlets, the web container creates a request object and a response object, then invokes the servlet service method. The web container invokes the servlet's destroy method when appropriate and unloads the servlet, after which the JVM performs garbage collection.


这里我想请教一下was什么情况下会 unload servlet ？

谢谢！