you are right, but it would be handled by https://issues.jboss.org/browse/ISPN-4025
right now, I'm assuming a stable topology.

Also, this is what I have in mind:
* site master splits the chunk by primary owner and sends each part
* each node receives it own part and apply it without double checking if it is the primary owner
* if, for some reason, a primary owner dies, it would be detected (I think) in the site master and it will apply that part itself 
* if the site master dies, the other site will resend the chunk