Comment 2 for bug 1361378

I'ts looks strange, because. afaik, "SELECT 1;" hack was not removed from oslo.db code.

I found in the tempest logs (in syslog), that MySQL process was killed, when the tests run. So `MySQL server has gone away` error looks correct in this case.

Aug 25 14:30:53 devstack-trusty-rax-dfw-1668934 kernel: [ 2571.497792] Out of memory: Kill process 9530 (mysqld) score 20 or sacrifice child
Aug 25 14:30:53 devstack-trusty-rax-dfw-1668934 kernel: [ 2571.497879] Killed process 9530 (mysqld) total-vm:4504928kB, anon-rss:163296kB, file-rss:0kB

http://logs.openstack.org/74/111574/4/gate/gate-tempest-dsvm-neutron-full/a8ff79a/logs/syslog.txt.gz