L.
Laurie Harper wrote:
Sure, I'll update Bug# 21611 as I get more details.
L.
Bill Barker wrote:
I just got a ton of these while doing a stress-test to try and get another
bug to crawl out from under it's rock ;-). I believe that there is a bug
here somewhere, but I'm currently chasing bug #1. If your server logs are
more interesting than mine (which don't say much more than NPE at ...),
could you at least post them as an attachment to a bugzilla report?
"Laurie Harper" <[EMAIL PROTECTED]> wrote in message news:[EMAIL PROTECTED]
Agreed :-) But understanding the life cycle of CoyoteRequestFacade may make it easier to do so. There's nothing particularly funky going on in the code that's exhibiting the problem so I don't know yet what I can pare away. I'm trying to get a local build of Tomcat set up so I can add some tracing and narrow things down.
L.
Shapira, Yoav wrote:
Howdy, The best thing is to come up with a way for us to reproduce it. The simplest, most direct way to get the exception.
Yoav Shapira Millennium ChemInformatics
-----Original Message----- From: Laurie Harper [mailto:[EMAIL PROTECTED] Sent: Tuesday, September 09, 2003 6:17 PM To: [EMAIL PROTECTED] Subject: NullPointer on getParameter
Hi, I'm trying to figure out a problem we've encountered since
upgrading
to Tomcat 4.1. I've seen this both on 4.1.24 and 4.1.27. I haven't yet
reduced it to a specific recipe for reproduction outside the context of
my application but I do see this quite frequently so I thought I'd see
if anyone else has come across it...
The problem is that a call to getParameter is getting a NullPointerException in the delegation method on CoyoteRequestFacade:
Caused by: java.lang.NullPointerException at org.apache.coyote.tomcat4.CoyoteRequestFacade. getParameter(CoyoteRequestFacade.java:178) at javax.servlet.ServletRequestWrapper. getParameter(ServletRequestWrapper.java:203)
I checked the code and line 178 just a call to the wrapped
CoyoteRequest
object, meaning that reference is null. Now, there's only two ways it could be null: a null reference was passed into CoyoteRequestFacade's constructor, or CoyoteRequestFacade.clear() was called.
As I understand it, a CoyoteRequestFacade should be associated with a
request when it starts and not released until the request has completed
so I'm leaning towards looking at the first possibility. Can anyone
give
me an overview of the 'life cycle' of CoyoteRequestFacade? Where is it created, managed, assigned/reclaimed from a particular request, etc?
Better yet, has anyone run into this and found a solution? The nearest thing I could find was Bug# 21611 which sounds like the same problem.
From the commentary, it doesn't look like there's a known cause yet;
what would be the best way to track this down (as I say, I can
reproduce
the behaviour easily here)?
Thanks,
L.
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