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Posted to users@tomcat.apache.org by Derek Alexander <D....@lse.ac.uk> on 2007/11/21 16:02:12 UTC
generic way of checking application status?
Deploying an app with a runtime dependency missing resulted in Servlet.init()
throwing a ServletException caused by a ClassNotFoundException.
Tomcat manager however reported the application as running. I guess it was
to a certain extent, however it would have been more useful to me to know
that there was a general problem with the app.
Anyone know a good generic way to check that an app has at least managed to
initialise ok.
Cheers
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RE: generic way of checking servlet status?
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Derek Alexander [mailto:D.Alexander@lse.ac.uk]
> Subject: Re: generic way of checking servlet status?
>
> As far as I can see there is no way to check if a
> Servlet is unavailable using Tomcat's built in MBeans.
This does look like a bit of an oversight. If an actual request is made
to a disabled servlet, the errorCount attribute of the corresponding
servlet MBean is incremented, but I can't see any other indication that
a problem exists.
- Chuck
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Re: generic way of checking servlet status?
Posted by Derek Alexander <D....@lse.ac.uk>.
Have considered this a bit further, seems the first step would be to mark the
Servlet as unavailable by ensuring init throws an UnavailableException. But
then what? As far as I can see there is no way to check if a Servlet is
unavailable using Tomcat's built in MBeans. Is this true?
Derek Alexander wrote:
>
> Deploying an app with a runtime dependency missing resulted in
> Servlet.init() throwing a ServletException caused by a
> ClassNotFoundException.
>
> Tomcat manager however reported the application as running. I guess it was
> to a certain extent, however it would have been more useful to me to know
> that there was a general problem with the app.
>
> Anyone know a good generic way to check that an app has at least managed
> to initialise ok.
>
> Cheers
>
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