The remote host may give an attacker information useful for future attacks
The remote host is running the SUN Java system application server. This version is reported vulnerable to a flaw in the way that it handles requests for '.jsp' code files. An attacker, exploiting this flaw, would be able to gain access to '.jsp' source code which could give an attacker information useful in future attacks.
SUN has released a fix for this version of their server. Apply the referenced patches.