Christopher,

Hopefully some useful answers.

> From: Christopher Schultz [mailto:ch...@christopherschultz.net]
> Sent: 20 November 2015 16:22

> On 11/20/15 11:13 AM, Simon Callan wrote:
> > We are running GWT 2.5.1, Tomcat 7.0.56 and 7.0.65 on windows server
> > 2008, IE 10, configured to serve web pages over SSL.
> >
> > The user can run our web-app and it will happily run until the user
> > closes the web-browser, or logs out from the app.
> >
> > However, immediately after starting the web-app, the tomcat home page
> > becomes unresponsive, and after the user has logged out or restarted
> > the browser, the web-app does not respond.
> >
> > The only way to recover is to restart tomcat.

> I'm going to have to clarify a few things, here.
>
> First, you say that the user can use the web app without any problems.
> Then you say that as soon as the web application starts, it becomes 
> unresponsive.
> So, which is it: does the web application "run happily" or does is it 
> unresponsive from the outset?
>
> Then, after the user logs-out (from the either completely responsive or 
> completely non-responsive
> web application), the web application becomes (or remains) unresponsive?

What I mean by this is:
1. User starts web-app, and uses it normally.
2. In a separate tab, the user tries to go to the tomcat home page, or the 
tomcat manager. IE displays the standard "This page can't be displayed" error 
message.
3. The user can continue using the web-app.
4. The user closes the web browser and restarts it or logs out from the 
web-app, and goes to the web-app start page. IE displays the standard "This 
page can't be displayed" error message.

It’s as though the RPC ("POST /clearcore/ClearCore/CCService HTTP/1.1") 
commands are working fine, but the normal page GET is failing.

Is it possible to kill the code that processes GET requests without affecting 
POST messages?

> > If we run tomcat in non-SSL mode, there is no problem.

> Do you mean if the user uses HTTP instead of HTTPS, all is well? Or does it 
> really depend upon whether TLS is enabled *at all*?

If we configure tomcat to use HTTPS on port 8443, we get the error. If we leave 
tomcat in the standard HTTP port 8080 settings, everything is fine. We haven't 
tried having both HTTP and HTTPS configured simultaneously.

>> The following are partial logs from Tomcat. As you can see, everything
>> looks fine, and manually comparing them with a working system shows no
>> obvious differences.

> No obvious differences between what and what?

Maybe I should say, no significant differences that I noticed between the logs 
taken from a working system, and the logs from the system that shows this error.

> Did your CTRL-BREAK produce a thread dump? I don't see it anywhere...

No, all we got was the "Console CTRL+BREAK event signaled" message in the 
logfile.

Simon

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