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From: "Caldarale, Charles R" <Chuck.Caldarale@unisys.com>
To: Tomcat Users List <users@tomcat.apache.org>
Date: Wed, 1 Jun 2011 15:10:39 -0500
Subject: RE: Tomcat 7 Shared Class Loader Removed?
Thread-Topic: Tomcat 7 Shared Class Loader Removed?
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> From: Ole Ersoy [mailto:ole.ersoy@gmail.com]=20
> Subject: Re: Tomcat 7 Shared Class Loader Removed?

> I was thinking about putting the jars in the shared repository,
> rather than deploying them with the war.  Could you please help
> me understand why this is bad?

1) You would have data sharing - probably inadvertent - across all the weba=
pps.  Information can leak from one to another, which has serious integrity=
 and security implications.

2) You would introduce versioning dependencies across all your webapp deplo=
yments, so if one copy of the webapp needed to be updated for a given clien=
t set, all would have to be updated simultaneously.

3) Redeployment or restart of a single webapp would be impossible.

Other than saving a certain amount of disk and memory space (both of which =
are exceedingly cheap these days), what do you think you would gain?

 - Chuck


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