Summary: We were releasing tx lock before consuming rows data which could place the connection in a bad state. Instead of changing lock placement we chose to remove it as mutations were changed to being serial which is expected when working with transactions.
Reviewed By: a8m
Differential Revision: D16449629
fbshipit-source-id: 9f2e7435036f35c407f0640e3dd1071a17b3c368
