Discussed this in RGW bug scrub today. Casey and Yehuda think it might be fixed with https://github.com/ceph/ceph/commit/dfb897ad576e4861a3cb75d85dffbbeaad5e980e
resetting need_info as shylesh provided the ack.
Verified on 10.2.2-21
Since the problem described in this bug report should be resolved in a recent advisory, it has been closed with a resolution of ERRATA. For information on the advisory, and where to find the updated files, follow the link below. If the solution does not work for you, open a new bug report. https://rhn.redhat.com/errata/RHBA-2016-1755.html