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From "Shapira, Yoav" <>
Subject RE: Why tomcat 4 or even 3?
Date Thu, 16 Sep 2004 12:45:00 GMT

All the arguments mentioned by others in this thread, especially the
"why upgrade if it's working" one, are raised frequently by companies
and developers.  It's a matter of resource constraints, as is everything
else in life ;)  Even you abide by the assumption that the latest stable
version is the best, and everyone should upgrade, you cannot assume
upgrading is a zero-cost task, and therefore you cannot assume there
will ever be sufficient motivation to do it.  That's a basic management
argument, and it's not specific to Tomcat by any means.

Naturally, I've heard the argument many times.  Since you also can't
assume any app is bug free, eventually bugs tend to show up.  Now the
developers have to re-learn the old version of the product, setup up a
dev environment for the old version of the app, patch, re-test, and
re-deploy.  This is frequently (in fact, research suggests nearly
always) must more costly than simply keeping up with upgrades.  Then the
company hires consultants to help them fix, and you'd be surprised how
many people make a nice living off of these type of consulting
assignments (any Tandy consultants on this list? ;).  This has been the
paradigm since at least the late 70's, and appears to only be getting
worse (again from research -- anyone on the list who reads the IEEE
Transactions on Engineering Management is fed up with this research).

But most developers are too busy to worry about that scenario, and it
goes back to the resource-constraint argument: if we as a company can
spend time on creating this new app to address an existing need, or
upgrading the server for a completely fine working app, that's a
no-brainer for management.

For government, military, and externally regulated industries the
scenario is even worse because there's a length change management and
audit process in place typically.

I could go on and on ;)  This is well-trodden territory, the subject of
much discussion in various offline forums I belong to.

Yoav Shapira
Millennium Research Informatics

>-----Original Message-----
>Sent: Thursday, September 16, 2004 2:19 AM
>Subject: Re: Why tomcat 4 or even 3?
>What is more, a lot of app's for big companies are just forgotten or
>have a few users, so why spend time upgrading to a newer version of
>Paul said:
>> Sometimes one dont need to be faster.
>> I'm talking about a old legacy app (not critical - intranet), running
>> very well for a couple of years in the same old server.
>Javier Polo.

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