MySQL lost connection error on mysqldump
In the end, it looks like I had a data corruption. I had copied two volumes (EC2 ebs) that were linked with LVM. I may not have frozen the volume properly when making the copy and I suspect they were not properly synchronized. I started from my original volumes, ran the procedure again, carefully freezing the xfs volume before taking the EC2 snapshot, then loading the copies onto my new server and it worked fine.