Hi Chuck,
These threads have clarified things for me as well. Thanks.
From: Jamie [mailto:[EMAIL PROTECTED]
Subject: Re: logging with multiple web applications
Ok. I currently have the log4j-1.2.14.jar file in the WEB-INF/lib
directory. I will remove it.
No, that's where it's supposed to be; one copy for each webapp. I
was referring to Tomcat's lib directory, not each webapp's.
I do have shared JARs and class files across web apps.
That is most likely the source of your problem.
This is a strongly desired feature as the intention is to
minimize the memory footprint of each web app.
Unless you have many thousands of shared classes, your concern is
probably unfounded. By introducing such run-time dependencies, you
pretty much guarantee that you have to take the whole server down
to update a single webapp, and created versioning hell when you
need to update a shared library for one particular webapp but not
the others. Memory is cheap; don't be afraid of configuring a
larger PermGen when needed.
Yes, this where I am. Memory is not cheap when you are running old
hardware w/o option to replace and have your own webapps large area.
But you are correct about tomcat's reasonable approach to the
problem. I'll need to do containers as singletons. If a webapps is
too PermGen intensive with 4000 clases, etc. maybe it needs its own
isolation.
Is there a way to use shared libs/classes and
have the logging output separate?
Yes, but it's ugly: each caller of a method in a shared class must
pass in a reference to the webapp's logger, rather than letting the
shared class have its own. You really don't want to do that, since
it complicates and obfuscates the interface. Just stop sharing
your classes.
Once I put apache in front I can.
I'm not replying in the related classloader thread, but that is
helpful as well in thinking about going from 5.5.25 to 6.
As always - illuminating.
Regards,
Dave
- Chuck
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