I want to know whether there are any caveats that one should take care of when implimenting a Weblogic server to talk to Oracle in a shared server environment???

The problem I'm seeing is that the Weblogic server we use seems to go down at random and would require a restart?

Does any one know of what could be the possible problems? One other thing for your information is

ORACLE STD Solaris 8
Weblogic server 3.1 Solaris 8

Any information is appreciated...