On Sat, Feb 19, 2005 at 06:38:03PM -0800, Oleg wrote:
: If I have 200 users deployed on tomcat with 99% using identical
: classes, would it be ok to move all classes to shared/classes
: directory? Will that give better memory usage? Also, can I later add
: the classes that are different directly to WEB-INF/classes and will
: they be given priority?
You've already received answers to the other points, so I'll address
just the last question:
it depends
With hierarchical classloaders, you can get yourself into a right snit
when 1/ there's version skew between the per-webapp class and the one in
shared/lib; and 2/ when a class in shared/lib depends on a class that's
in the per-webapp area (that is, it can't see a dependent class because
it's out of the scope of the current classloader).
IIRC, both result in NoClassDefFoundError, and both can be a mess to
sort out if you don't know in advance where to start looking.
-QM
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