About NullPointerException with Oracle

[Migrated From Jforum.net]

Hi, everyone:
I got NPE like blew(I use JForum2.1.7, oracle9i, apache+tomcat)

HTTP Status 500 - 

--------------------------------------------------------------------------------

type Exception report

message 

description The server encountered an internal error () that prevented it from fulfilling this request.

exception 

java.lang.NullPointerException
	net.jforum.JForum.handleException(JForum.java:282)
	net.jforum.JForum.service(JForum.java:208)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
	net.jforum.util.legacy.clickstream.ClickstreamFilter.doFilter(ClickstreamFilter.java:59)


note The full stack trace of the root cause is available in the Apache Tomcat/5.5.12 logs.

Can you help me about that.
BTW:
It seems that it hold up many Oracle Connections at this case.

Thanks
[originally posted on jforum.net by sywhale]