We are trying to set up HA singleton for the whole application. The purpose is to allow us to have a backup instance if one is down, or in the case of maintenance, we will have a very brief outage since the other instance will become HA singleton provider.

In this scenario, do we still need to add <distributable/> in web.xml?

I tried to add this line in web.xml, and many functions are not working. What could be the root cause? Our application also has a Seam on top of the JEE