This time, it is happened on different nodes.

check the CMD running output below, And ovs log attached.

[wrsroot@controller-0 tmp(keystone_admin)]$ system host-list
+----+--------------+-------------+----------------+-------------+--------------+
| id | hostname     | personality | administrative | operational | availability |
+----+--------------+-------------+----------------+-------------+--------------+
| 1  | controller-0 | controller  | unlocked       | enabled     | available    |
| 2  | controller-1 | controller  | unlocked       | enabled     | available    |
| 3  | storage-0    | storage     | unlocked       | enabled     | available    |
| 4  | storage-1    | storage     | unlocked       | enabled     | available    |
| 5  | compute-0    | worker      | unlocked       | enabled     | available    |
| 6  | compute-1    | worker      | unlocked       | enabled     | available    |
| 7  | compute-2    | worker      | unlocked       | disabled    | offline      |
| 8  | compute-3    | worker      | unlocked       | enabled     | available    |
| 9  | compute-4    | worker      | unlocked       | enabled     | available    |
+----+--------------+-------------+----------------+-------------+--------------+
[wrsroot@controller-0 tmp(keystone_admin)]$


on compute-2:
compute-2:~$ sudo find /sys -name "free_hugepages*"
Password:
/sys/devices/system/node/node0/hugepages/hugepages-1048576kB/free_hugepages
/sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages
/sys/devices/system/node/node1/hugepages/hugepages-1048576kB/free_hugepages
/sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages
/sys/kernel/mm/hugepages/hugepages-1048576kB/free_hugepages
/sys/kernel/mm/hugepages/hugepages-2048kB/free_hugepages
compute-2:~$ sudo find /sys -name "free_hugepages" | xargs -L1 grep -E "^"
0
0
0
0
0
0
compute-2:~$ mount | grep -i huge
cgroup on /sys/fs/cgroup/hugetlb type cgroup (rw,nosuid,nodev,noexec,relatime,hugetlb)
none on /dev/huge-1048576kB type hugetlbfs (rw,relatime,pagesize=1048576kB)
none on /mnt/huge-2048kB type hugetlbfs (rw,relatime,pagesize=2048kB)
none on /dev/huge-2048kB type hugetlbfs (rw,relatime,pagesize=2048kB)
none on /dev/hugepages type hugetlbfs (rw,relatime,pagesize=2M)
none on /mnt/huge-1048576kB type hugetlbfs (rw,relatime,pagesize=1048576kB)
compute-2:~$ sudo echo 3 > sudo tee /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/free_hugepages
compute-2:~$ sudo echo 3 > sudo tee /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/free_hugepages
compute-2:~$ sudo echo 5000 > sudo tee /sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages
compute-2:~$ sudo echo 5000 > sudo tee /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages
compute-2:~$ sudo cat /sys/devices/system/node/node0/hugepages/hugepages-1048576kB/free_hugepages
0
compute-2:~$ sudo cat /sys/devices/system/node/node1/hugepages/hugepages-1048576kB/free_hugepages
0
compute-2:~$ sudo cat /sys/devices/system/node/node0/hugepages/hugepages-2048kB/free_hugepages
0
compute-2:~$ sudo cat /sys/devices/system/node/node1/hugepages/hugepages-2048kB/free_hugepages
0
compute-2:~$ systemctl status ovsdb-server
● ovsdb-server.service - Open vSwitch Database Unit
   Loaded: loaded (/usr/lib/systemd/system/ovsdb-server.service; static; vendor preset: disabled)
   Active: active (running) since Tue 2019-05-21 13:41:38 UTC; 37min ago
  Process: 36956 ExecStop=/usr/share/openvswitch/scripts/ovs-ctl --no-ovs-vswitchd stop (code=exited, status=0/SUCCESS)
  Process: 36985 ExecStart=/usr/share/openvswitch/scripts/ovs-ctl --no-ovs-vswitchd --no-monitor --system-id=random ${OVSUSER} start $OPTIONS (code=exited, status=0/SUCCESS)
  Process: 36980 ExecStartPre=/bin/sh -c rm -f /run/openvswitch/useropts; if [ "$${OVS_USER_ID/:*/}" != "root" ]; then /usr/bin/echo "OVSUSER=--ovs-user=${OVS_USER_ID}" > /run/openvswitch/useropts; fi (code=exited, status=0/SUCCESS)
  Process: 36978 ExecStartPre=/usr/bin/chown ${OVS_USER_ID} /var/run/openvswitch /var/log/openvswitch (code=exited, status=0/SUCCESS)
 Main PID: 37021 (ovsdb-server)
    Tasks: 1
   Memory: 1.2M
   CGroup: /system.slice/ovsdb-server.service
           └─37021 ovsdb-server /etc/openvswitch/conf.db -vconsole:emer -vsyslog:err -vfile:info --remote=punix:/var/run/openvswitch/db.sock --private-key=db:Open_vSwitch,SSL,private_key --certificate=d...
compute-2:~$ systemctl status ovs-vswitchd
● ovs-vswitchd.service - Open vSwitch Forwarding Unit
   Loaded: loaded (/usr/lib/systemd/system/ovs-vswitchd.service; static; vendor preset: disabled)
   Active: failed (Result: start-limit) since Tue 2019-05-21 13:41:43 UTC; 38min ago
  Process: 36931 ExecStop=/usr/share/openvswitch/scripts/ovs-ctl --no-ovsdb-server stop (code=exited, status=0/SUCCESS)
  Process: 37401 ExecStart=/usr/share/openvswitch/scripts/ovs-ctl --no-ovsdb-server --no-monitor --system-id=random ${OVSUSER} start $OPTIONS (code=exited, status=1/FAILURE)
 Main PID: 36710 (code=dumped, signal=ABRT)
compute-2:~$ sudo systemctl restart ovs-vswitchd
Job for ovs-vswitchd.service failed because the control process exited with error code. See "systemctl status ovs-vswitchd.service" and "journalctl -xe" for details.
compute-2:~$ systemctl status ovs-vswitchd
● ovs-vswitchd.service - Open vSwitch Forwarding Unit
   Loaded: loaded (/usr/lib/systemd/system/ovs-vswitchd.service; static; vendor preset: disabled)
   Active: failed (Result: start-limit) since Tue 2019-05-21 14:20:08 UTC; 32s ago
  Process: 36931 ExecStop=/usr/share/openvswitch/scripts/ovs-ctl --no-ovsdb-server stop (code=exited, status=0/SUCCESS)
  Process: 61311 ExecStart=/usr/share/openvswitch/scripts/ovs-ctl --no-ovsdb-server --no-monitor --system-id=random ${OVSUSER} start $OPTIONS (code=exited, status=1/FAILURE)
 Main PID: 36710 (code=dumped, signal=ABRT)