Hi, 

We have failed cq with ovirt-imageio failing to start on upgrade suite. I can still only see errors in the messages log. 
I'm writing the reported patch but I don't think it has anything to do with this issue. 

Link and headline of suspected patches: 
restapi: Enable update to no default network provider of cluster - https://gerrit.ovirt.org/#/c/84814/

Link to Job:
http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/4194/

Link to all logs:

http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/4194/artifact/

http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/4194/testReport/junit/(root)/001_initialize_engine/test_initialize_engine/

http://jenkins.ovirt.org/job/ovirt-master_change-queue-tester/4194/artifact/exported-artifacts/upgrade-from-release-suit-master-el7/test_logs/upgrade-from-release-suite-master/post-001_initialize_engine.py/lago-upgrade-from-release-suite-master-engine/_var_log/messages/*view*/

(Relevant) error snippet from the log: 
<error>
From messages log

Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Started oVirt Engine.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Reloading.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Configuration file /usr/lib/systemd/system/ebtables.service is marked executable. Please remove executable permission bits. Proceeding anyway.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Starting oVirt Engine Data Warehouse...
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Started oVirt Engine Data Warehouse.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Reloading.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Configuration file /usr/lib/systemd/system/ebtables.service is marked executable. Please remove executable permission bits. Proceeding anyway.
Nov 28 12:32:13 lago-upgrade-from-release-suite-master-engine systemd: Starting oVirt ImageIO Proxy...
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: Traceback (most recent call last):
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/bin/ovirt-imageio-proxy", line 85, in <module>
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: status = image_proxy.main(args, config)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib/python2.7/site-packages/ovirt_imageio_proxy/image_proxy.py", line 21, in main
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: image_server.start(config)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib/python2.7/site-packages/ovirt_imageio_proxy/server.py", line 45, in start
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: WSGIRequestHandler)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/SocketServer.py", line 419, in __init__
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: self.server_bind()
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/wsgiref/simple_server.py", line 48, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: HTTPServer.server_bind(self)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 108, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: SocketServer.TCPServer.server_bind(self)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/SocketServer.py", line 430, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: self.socket.bind(self.server_address)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/socket.py", line 224, in meth
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: return getattr(self._sock,name)(*args)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: socket.error: [Errno 98] Address already in use
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service: main process exited, code=exited, status=1/FAILURE
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: Failed to start oVirt ImageIO Proxy.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: Unit ovirt-imageio-proxy.service entered failed state.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service failed.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service holdoff time over, scheduling restart.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: Starting oVirt ImageIO Proxy...
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: Traceback (most recent call last):
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/bin/ovirt-imageio-proxy", line 85, in <module>
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: status = image_proxy.main(args, config)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib/python2.7/site-packages/ovirt_imageio_proxy/image_proxy.py", line 21, in main
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: image_server.start(config)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib/python2.7/site-packages/ovirt_imageio_proxy/server.py", line 45, in start
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: WSGIRequestHandler)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/SocketServer.py", line 419, in __init__
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: self.server_bind()
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/wsgiref/simple_server.py", line 48, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: HTTPServer.server_bind(self)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/BaseHTTPServer.py", line 108, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: SocketServer.TCPServer.server_bind(self)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/SocketServer.py", line 430, in server_bind
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: self.socket.bind(self.server_address)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: File "/usr/lib64/python2.7/socket.py", line 224, in meth
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: return getattr(self._sock,name)(*args)
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine ovirt-imageio-proxy: socket.error: [Errno 98] Address already in use
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service: main process exited, code=exited, status=1/FAILURE
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: Failed to start oVirt ImageIO Proxy.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: Unit ovirt-imageio-proxy.service entered failed state.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service failed.
Nov 28 12:32:14 lago-upgrade-from-release-suite-master-engine systemd: ovirt-imageio-proxy.service holdoff time over, scheduling restart.
</error>