Comment 3 for bug 1698355

It's OOM issue.

Jun 16 10:24:22 ubuntu-xenial-osic-cloud1-s3500-9356859 kernel: Out of memory: Kill process 25855 (neutron-server) score 539 or sacrifice child
Jun 16 10:24:22 ubuntu-xenial-osic-cloud1-s3500-9356859 kernel: Killed process 25855 (neutron-server) total-vm:9168668kB, anon-rss:5334496kB, file-rss:2320kB

http://logs.openstack.org/65/473765/1/check/gate-heat-dsvm-functional-convg-mysql-lbaasv2-py35-ubuntu-xenial/e07f32f/logs/syslog.txt.gz#_Jun_16_10_24_22