rpl.rpl_parallel_optimistic_nobinlog failed in buildbot with "InnoDB: Killing connection failed Deadlock"

rpl.rpl_parallel_optimistic_nobinlog 'stmt,xtradb' w1 [ fail ]  Found warnings/errors in server log file!

        Test ended at 2016-11-29 17:27:17

line

2016-11-29 17:27:17 140288030135040 [Warning] InnoDB: Killing connection failed Deadlock(16)

^ Found warnings in /run/shm/var/1/log/mysqld.2.err

ok

 - saving '/run/shm/var/1/log/rpl.rpl_parallel_optimistic_nobinlog-stmt,xtradb/' to '/run/shm/var/log/rpl.rpl_parallel_optimistic_nobinlog-stmt,xtradb/'

Retrying test rpl.rpl_parallel_optimistic_nobinlog, attempt(2/3)...