as far as I know, there were two attempts to get Errai work in a cluster:
Adam Karl was successful (https://community.jboss.org/thread/149693?start=0&tstart=0).
He used sticky sessions. Unfortunately, he was not allowed to disclose any further details.
Then there was an attempt using Terracotta (http://forums.terracotta.org/forums/posts/list/3019.page).
The post stopped getting com.tc.object.tx.UnlockedSharedObjectException.
In the former post, Mike Brock says that "one community user has been
successful clustering ErraiBus using Terracotta".
Is there a guide how to cluster Errai? Most enterprise applications are
running on clusters.
We do not have built in support for clustering (yet). I am planning on adding JMS "backplaning" as a way to cluster ErraiBus instances. But generally when using ErraiBus in a servlet context, clustering should work fine as long as you have session replication and you don't have stateful services.