Dan,

It looks like it was one of the calls triggered when vdsm was down:

2018-04-03 05:30:16,065-0400 INFO  (mailbox-hsm) [storage.MailBox.HsmMailMonitor] HSM_MailMonitor sending mail to SPM - ['/usr/bin/dd', 'of=/rhev/data-center/ddb765d2-2137-437d-95f8-c46dbdbc7711/mastersd/dom_md/inbox', 'iflag=fullblock', 'oflag=direct', 'conv=notrunc', 'bs=4096', 'count=1', 'seek=1'] (mailbox:387)
2018-04-03 05:31:22,441-0400 INFO  (MainThread) [vds] (PID: 20548) I am the actual vdsm 4.20.23-28.gitd11ed44.el7.centos lago-basic-suite-4-2-host-0 (3.10.0-693.21.1.el7.x86_64) (vdsmd:149)

which failed and caused timeout.

Thanks,
Piotr

On Tue, Apr 3, 2018 at 1:57 PM, Dan Kenigsberg <danken@redhat.com> wrote:
On Tue, Apr 3, 2018 at 2:07 PM, Barak Korren <bkorren@redhat.com> wrote:
> Test failed: [ 006_migrations.prepare_migration_attachments_ipv6 ]
>
> Link to suspected patches:
>
> (Patch seems unrelated - do we have sporadic communication issues
> arising in PST?)
> https://gerrit.ovirt.org/c/89737/1 - vdsm - automation: check-patch:
> attempt to install vdsm-gluster
>
> Link to Job:
> http://jenkins.ovirt.org/job/ovirt-4.2_change-queue-tester/1521/
>
> Link to all logs:
> http://jenkins.ovirt.org/job/ovirt-4.2_change-queue-tester/1521/artifact/exported-artifacts/basic-suit-4.2-el7/test_logs/basic-suite-4.2/post-006_migrations.py/
>
> Error snippet from log:
>
> <error>
>
> Traceback (most recent call last):
>   File "/usr/lib64/python2.7/unittest/case.py", line 369, in run
>     testMethod()
>   File "/usr/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
>     self.test(*self.arg)
>   File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line
> 129, in wrapped_test
>     test()
>   File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line
> 59, in wrapper
>     return func(get_test_prefix(), *args, **kwargs)
>   File "/usr/lib/python2.7/site-packages/ovirtlago/testlib.py", line
> 78, in wrapper
>     prefix.virt_env.engine_vm().get_api(api_ver=4), *args, **kwargs
>   File "/home/jenkins/workspace/ovirt-4.2_change-queue-tester/ovirt-system-tests/basic-suite-4.2/test-scenarios/006_migrations.py",
> line 139, in prepare_migration_attachments_ipv6
>     engine, host_service, MIGRATION_NETWORK, ip_configuration)
>   File "/home/jenkins/workspace/ovirt-4.2_change-queue-tester/ovirt-system-tests/basic-suite-4.2/test_utils/network_utils_v4.py",
> line 71, in modify_ip_config
>     check_connectivity=True)
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/services.py",
> line 36729, in setup_networks
>     return self._internal_action(action, 'setupnetworks', None,
> headers, query, wait)
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line
> 299, in _internal_action
>     return future.wait() if wait else future
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line
> 55, in wait
>     return self._code(response)
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line
> 296, in callback
>     self._check_fault(response)
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line
> 132, in _check_fault
>     self._raise_error(response, body)
>   File "/usr/lib64/python2.7/site-packages/ovirtsdk4/service.py", line
> 118, in _raise_error
>     raise error
> Error: Fault reason is "Operation Failed". Fault detail is "[Network
> error during communication with the Host.]". HTTP response code is
> 400.

The error occurred sometime in the interval

09:32:58 [basic-suit] @ Run test: 006_migrations.py:
09:33:55 [basic-suit] Error occured, aborting

and indeed

http://jenkins.ovirt.org/job/ovirt-4.2_change-queue-tester/1521/artifact/exported-artifacts/basic-suit-4.2-el7/test_logs/basic-suite-4.2/post-006_migrations.py/lago-basic-suite-4-2-engine/_var_log/ovirt-engine/engine.log/*view*/

has Engine disconnected from the host at

2018-04-03 05:33:32,307-04 ERROR
[org.ovirt.engine.core.vdsbroker.monitoring.HostMonitoring]
(EE-ManagedThreadFactory-engineScheduled-Thread-39) [] Unable to
RefreshCapabilities: VDSNetworkException: VDSGenericException:
VDSNetworkException: Vds timeout occured

Maybe Piotr can read more into it.