[opencms-dev] Strange JSP compile behaviour

[Joe Desbonnet]

I should have been more specific when I said "purge the FlexCache":

It's the "Purge JSP repository" button that seems to cause the
problem. In the situation where a running OpenCms has to quickly
recompile all the template scripts something seems to go wrong on
occasion.

Joe.


On 9/15/06, Joe Desbonnet <jdesbonnet at gmail.com> wrote:
> It's going difficult to reproduce for debugging purposes. I wonder if
> the Alkacon guys could think about it for a few minutes and see if
> there is any threading issues that might cause this.
>
> Ie why would a template JSP have differing "current directory" during
> compile? And why would some threads have succeeded in compiling the
> template JSP and others report a 500 error with a JSP compile error?
>
> I think you're right -- this could be a missing "synchronized" keyword
> in some code somewhere.
>
> Joe.
>
>
> On 9/15/06, Jonathan Woods <jonathan.woods at scintillance.com> wrote:
> > Joe -
> >
> > I've seen odd behaviour on repeated JSP reloads - e.g. blank pages being
> > delivered occasionally - but have never got to the bottom of what's
> > producing the behaviour.  I wonder if it's a threading problem.  I suspect
> > the core OpenCms code, but you might be able to get round it by setting the
> > JSP 'singlethreadmodel' directive in your own pages (I forget precisely what
> > it's called) and see if that makes any difference.
> >
> > Jon
> >
> > -----Original Message-----
> > From: opencms-dev-bounces at opencms.org
> > [mailto:opencms-dev-bounces at opencms.org] On Behalf Of Joe Desbonnet
> > Sent: 15 September 2006 13:43
> > To: The OpenCms mailing list
> > Subject: [opencms-dev] Strange JSP compile behaviour
> >
> > For convenience I put common template code into "library" JSP files in a
> > "lib" directory which I include at the top of my template JSP scripts... so
> > my template module directory layout is something like:
> >
> > (module dir)/resources/
> > (module dir)/templates/
> > (module dir)/templates/lib/
> >
> > At the top of my template JSP scripts I have an include, something like:
> > <%@include file="lib/_jsp_header.jsp"%>
> >
> > This works very well, 99.99% of the time. But very occasionally (and this
> > seems to happen after a manual purge of the FlexCache) the live site
> > randomly reports 500 errors. The jist of the error is a JSP compilation
> > error: cannot find file "lib/lib/_jsp_header.jsp". Note that it's looking
> > for my include relative to the lib directory -- not the template directory.
> >
> > Even stranger: if I reload the problematic page a few times it sometimes
> > works and sometimes reports the 500 error.  It's like it's broken in some
> > server threads and not others.
> >
> > Can anyone think of a possible cause of this. Of course I could hard code
> > absolute path's in my includes, but that would be ugly IMHO.
> >
> > This must be a bug of some sort. I would have thought that the "current
> > directory" when looking for include files during compile should be the same
> > in all cases.
> >
> > I am using OpenCms 6.0.4, Tomcat 5.5.9, JDK 1.5.0_07 on Linux.
> >
> > Joe.
> >
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> >
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