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From Peter Crowther <>
Subject Re: w3wp randomly crashes when redirector is used
Date Wed, 03 Feb 2010 22:52:34 GMT
Steve, I'm with you - the issue does look unpleasantly similar.  I wonder
whether some experimentation with running the redirector under a local
account with particular rights set might tell you which right was required,
and hence which one might be causing an issue?

But in the longer term, the stack trace shows it's faulting in the
redirector's TerminateFilter, while waiting on a critical section.  Looking
at this plus the identical stack trace in Bugzilla, it does feel like it's
an issue with the redirector.

Does it always happen in your app, or is it intermittent?  If intermittent,
is it more likely to trigger when something's under load?

- Peter

On 3 February 2010 22:12, Steve Ryan <> wrote:

> Hi Andre
> Thanks for your reply.
> W3wp.exe is the process which manages the application pool where the
> redirector lives.
> I'm fairly confident the problem is due to the redirector because the crash
> only occurs when the redirector is used. Also, there is an open bug (45063)
> which appears to be a very similar issue.
> I do of course accept the problem could lie at Microsoft's door though. :)
> I guess I'm hoping someone has heard of this issue before, and knows of
> some
> sort of workaround which doesn't involve using the "Local System" account.
> Cheers
> Steve
> -----Original Message-----
> From: André Warnier []
> Sent: 03 February 2010 21:58
> To: Tomcat Users List
> Subject: Re: w3wp randomly crashes when redirector is used
> Steve Ryan wrote:
> > My issue is due to Tomcat Connectors 1.2.28.
> >
> > Is there a more specific mailing list for such issues? The Tomcat
> Connectors
> > website shows as the mailing list.
> >
> No. If your issue is indeed due to the Windows version of the mod_jk
> connector, then you are on the correct list.
> I am far from the specialist on the Windows/jk side of things, but I am
> still puzzled however.
> According to your explanation below, the application which crashes is
> something called "w3wp.exe".  This does not really sound like an
> application which lives under Java and Tomcat.
> The jk redirector's function is to redirect (or rather "proxy") some
> HTTP requests from IIS to a back-end Tomcat, so that these requests are
> processed by a Tomcat-based application.  Conversely, the response from
> this Tomcat-based application is then returned through the jk
> redirector, back to IIS, and from there to the client.
> What motivates my puzzlement is that, if w3wp.exe is really an
> application which lives under IIS and not Tomcat, then there does not
> seem to exist any reason why the jk redirector would have anything to do
> with it.
> My knowledge being limited, there might well be something I am missing
> in all of this.
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