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Message-ID: <3A3E715C.BE758D7@smart911.com>
Date: Mon, 18 Dec 2000 12:19:40 -0800
From: David Miller <dmiller@smart911.com>
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To: tomcat-user@jakarta.apache.org
Subject: CLASSPATH precedence
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Hi,

Two related questions regarding CLASSPATH precedence:

(A) If I place the same *.jar files (same names but different versions)
in both
                $TOMCAT_HOME/webapps/WEBAPP_A/WEB-INF/lib
and in     $TOMCAT_HOME/webapps/WEBAPP_B/WEB-INF/lib

does the version of the *.jar files in WEBAPP_A or in WEBAPP_B take
precedence? Or does it depend on which context I am in (i.e., which
webapp tomcat is running). How does tomcat figure out which version of
the *.jar files to use? Do classes loaded from one *.jar file get
unloaded if I am running in a different context?

(B) (similar question but for system *.jar files vs tomcat *.jar files):

If I place the same *.jar files (same names but different versions) in
both
                $TOMCAT_HOME/webapps/WEBAPP_A/WEB-INF/lib
and in my system CLASSPATH

which version of the *.jar files take precedence when I am running ?

Any answers/information regarding these two questions is greatly
appreciated, especially ones which shed some light on how tomcat figures
out which version of classes to load. Thanks,

-David-