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From Martin Jacobson <>
Subject Re: Ant redeploy, Apache (mod_webapp) & Tomcat 4.1
Date Fri, 31 Jan 2003 16:06:30 GMT
Morgan Pyne wrote:
> Hi all,
> Is anybody on this list using Ant to redeploy war files to
> an Apache(mod_webapp)->Tomcat setup?
> I have several servlets already deployed, configured, and working 
> correctly on the following setup:
> Apache (1.3.26), mod_webapp (machine 1)
> Tomcat 4.1.12 (machine 2)
> The redeployment seems to work correctly, but unfortunately when I access
> the URL I am often returned a blank page (no errors) instead of seeing my 
> servlet.
> Restarting apache cures the problem.
> It is occasionally possible (randomly?) to access the new servlet without 
> a restart, but mostly not.
> The symptoms seem to imply to me that only new WARP connections created
> since the redeployment are able to access the servlet, whereas connections
> that had been existing prior to it get confused and can't see the newly
> redeployed servlet.
> Has anybody else noticed this behaviour? Is it a bug in mod_webapp ?

This is what I would expect to happen; AFAIK, mod_webapp, mod_jk etc. 
all create socket connections to Tomcat. In order to re-deploy your web 
app, Tomcat stops and restarts the context, which closes one end of the 
socket. Therefore Apache has to be restarted in order to reconnect to 
Tomcat properly.


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