Tomcat hang everyday

[Rajasekar]

Hi,
 I am using tomcat5.0 with java1.5.0.
Every i have to restart the my tomcat, it is working the day full. but when 
i come to office nextday i have to restart. What could be the problem? and 
how can I resolve it. If anyone give me the solutions i would appricate.
 
Rajasekar V.R