@scottalanmiller : It's a live storage migration between 2 hosts and both having a local storages.

I didn't understand what RDBD stands for.

I am facing a similar issue when I am doing live storage migration from one host to another host and in my case I am using local SR and performing an operation from CloudPlatform UI.
I am using Ubuntu 14.0.4 for storage live migration.

From management-server log I am getting below error.
errorInfo: [INTERNAL_ERROR, Xenops_interface.Internal_error("Domain.Xenguest_failure("Error while waiting for suspend notification: xenguest: xc_domain_save: [1] Save failed (22 = Invalid argument)")")]