Re: Showstopper Undeploy Problem??

Jetty and Tomcat both use Jasper as their JSP engine.

This is most likely a problem with Jasper, or some other process on your 
box cleaning up /tmp.

If you are sure that no external process is screwing things up, then one 
way to avoid this happening would be to precompile your JSPs.

This means that you will no longer be deploying any JSPs, but compiled 
Servlets. Then you will have no temporarily cached class files to worry 
about.

advantages are:

- compile-time errors will be caught in development, not production
- deploying to a heavily loaded site will not cause multiple concurrent 
compilations of e.g. index.jsp (patch submitted to Jasper)
- dispatch of request to servlet is simpler and therefore quicker since 
it goes direct from Jetty->Servlet and not Jetty-.Jasper->Servlet.
- no compile environment needed on your production box - where it may be 
considered a security hazard.

This FAQ contains an entry on JSP precompilation which I hope will be 
enlightening....

http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/jboss/contrib/jetty/FAQ?rev=HEAD&content-type=text/vnd.viewcvs-markup


Jules


Frank Morton wrote:
> Jboss 3.0.0
> Linux/JDK 1.4.0
>
> Second time this happened in about 3 weeks.
> No error reported in any logs.
>
> Was running just fine, but started getting 404 errors like the url
> didn't exist trying to display a commonly used jsp (logon page).
>
> If I look at the jsp directory created by deploying the .war file,
> all of the jsps are gone except one and a directory. If I restart
> jboss without touching the files in the deploy directory, things go
> back to normal.
>
> Somehow deployed files are getting undeployed while the
> server is running, even though the originating .war file is untouched.
>
> Is there any temporary solution to make an application 
> undeployable? I need help on this one.
>
> Thanks.
>
>
>
> , none of the jsp files look to be deployed now
>
>
>
>
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