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What issues did you have with Grails?

What do you regret about Grails?

Not sure if this was your issue, but we started using a little Groovy in some of our webapps, and started getting Tomcat crashes due to running out of java permgen space. I believe this is a side effect of Groovy's meta-classes. I think all we had to do was up the permgen space, but it soured certain members of our team to Groovy.

I'll ask as well - what do you regret about time invested in Grails?

What did you not like about Grails?

FWIW, I've been using Grails extensively for the past year or so, and have absolutely loved the experience.