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how painful is upgrading

 
J. Kevin Robbins
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We are still at servlet 2.5 and JSP 2.1. I've got some system downtime coming up next week and I'm considering upgrading.

Is it just a matter of replacing a few jar files?

I'm on Tomcat 6.0, is that adequate?

Is Servlet 3.1 mature enough or should I play it safe and go with 3.0?
 
Ulf Dittmer
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I'd suggest to move away from TC 6. I would assume that TC 8 is stable, but haven't seen a compelling reason to use it for any of our stuff. Plus, not all servers have Java 7 installed yet, so that's a showstopper: http://tomcat.apache.org/whichversion.html
 
J. Kevin Robbins
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I'm planning to upgrade from Java 6 to Java 7 next week and that's why I was thinking maybe I should upgrade the container at the same time. But after talking to some of our folks at corporate, I'm going to wait. They are still at the same level as me. They have a new VM image with Tomcat 7, Java 8, Tomcat Native and mod_jk connector and the new Tomcat DBCP, but it's not in production yet. I'll let them shake the bugs out before I jump on that wagon. Maybe we'll go virtual here in the next year or so and I can use their image.
 
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