This week's book giveaway is in the Mac OS forum. We're giving away four copies of a choice of "Take Control of Upgrading to Yosemite" or "Take Control of Automating Your Mac" and have Joe Kissell on-line! See this thread for details.
I think there is no explicit limitation, but a discrete one.
I have seen a lot of application deployed in different managed servers, I think the best here it is to check a capacity planning if it is a good practice to have X ear at the same managed server by performance issues.