I guess this is a BUG!!!

[micky none]

Can anyone please tell me if it's a BUG....i think it is one.
I'm using Tomcat5.5.7 and i am not able to undeploy the file,it shows that the 
file is undeployed 
and loads the new file.But it still keeps showing the old file contents.Can 
anyone tell me what's the fix??
Secondly,the server does not restarts until I explicitly use the "kill 
proccess_id" for the java process.
Please enlighten me.