[ovirt-devel] [ OST Failure Report ] [ oVirt 4.2 ] [ 2018-04-04 ] [006_migrations.prepare_migration_attachments_ipv6]
Dafna Ron
dron at redhat.com
Thu Apr 12 15:15:23 UTC 2018
hi,
we are failing randomly on test 006_migrations.migrate_vm with what seems
to be the same issue.
the vm seems to be migrated successfully but engine thinks that it failed
and re-calls migration getting a response of vm already exists.
I don't think this is an issue with the test but rather a regression so I
opened a bug:
https://bugzilla.redhat.com/show_bug.cgi?id=1566594
Thanks,
Dafna
On Wed, Apr 11, 2018 at 1:52 PM, Milan Zamazal <mzamazal at redhat.com> wrote:
> Arik Hadas <ahadas at redhat.com> writes:
>
> > On Wed, Apr 11, 2018 at 12:45 PM, Alona Kaplan <alkaplan at redhat.com>
> wrote:
> >
> >>
> >>
> >> On Tue, Apr 10, 2018 at 6:52 PM, Gal Ben Haim <gbenhaim at redhat.com>
> wrote:
> >>
> >>> I'm seeing the same error in [1], during 006_migrations.migrate_vm.
> >>>
> >>> [1] http://jenkins.ovirt.org/job/ovirt-4.2_change-queue-tester/1650/
> >>>
> >>
> >> Seems like another bug. The migration failed since for some reason the
> vm
> >> is already defined on the destination host.
> >>
> >> 2018-04-10 11:08:08,685-0400 ERROR (jsonrpc/0) [api] FINISH create
> >> error=Virtual machine already exists (api:129)
> >> Traceback (most recent call last):
> >> File "/usr/lib/python2.7/site-packages/vdsm/common/api.py", line 122,
> in
> >> method
> >> ret = func(*args, **kwargs)
> >> File "/usr/lib/python2.7/site-packages/vdsm/API.py", line 191, in
> create
> >> raise exception.VMExists()
> >> VMExists: Virtual machine already exists
> >>
> >>
> > Milan, Francesco, could it be that because of [1] that appears on the
> > destination host right after shutting down the VM, it remained defined on
> > that host?
>
> I can't see any destroy call in the logs after the successful preceding
> migration from the given host. That would explain “VMExists” error.
>
> > [1] 2018-04-10 11:01:40,005-0400 ERROR (libvirt/events) [vds] Error
> running
> > VM callback (clientIF:683)
> >
> > Traceback (most recent call last):
> >
> > File "/usr/lib/python2.7/site-packages/vdsm/clientIF.py", line 646, in
> > dispatchLibvirtEvents
> >
> > v.onLibvirtLifecycleEvent(event, detail, None)
> >
> > AttributeError: 'NoneType' object has no attribute
> 'onLibvirtLifecycleEvent'
>
> That means that a life cycle event on an unknown VM has arrived, in this
> case apparently destroy event, following the destroy call after the
> failed incoming migration. The reported AttributeError is a minor bug,
> already fixed in master. So it's most likely unrelated to the discussed
> problem.
>
> >>> On Tue, Apr 10, 2018 at 4:14 PM, Alona Kaplan <alkaplan at redhat.com>
> >>> wrote:
> >>>
> >>>> Hi all,
> >>>>
> >>>> Looking at the log it seems that the new GetCapabilitiesAsync is
> >>>> responsible for the mess.
> >>>>
> >>>> -
> >>>> * 08:29:47 - engine loses connectivity to host
> 'lago-basic-suite-4-2-host-0'.*
> >>>>
> >>>>
> >>>>
> >>>> *- Every 3 seconds a getCapabalititiesAsync request is sent to the
> host (unsuccessfully).*
> >>>>
> >>>> * before each "getCapabilitiesAsync" the monitoring lock is
> taken (VdsManager,refreshImpl)
> >>>>
> >>>> * "getCapabilitiesAsync" immediately fails and throws
> 'VDSNetworkException: java.net.ConnectException: Connection refused'. The
> exception is caught by 'GetCapabilitiesAsyncVDSCommand.executeVdsBrokerCommand'
> which calls 'onFailure' of the callback and re-throws the exception.
> >>>>
> >>>> catch (Throwable t) {
> >>>> getParameters().getCallback().onFailure(t);
> >>>> throw t;
> >>>> }
> >>>>
> >>>> * The 'onFailure' of the callback releases the "monitoringLock"
> ('postProcessRefresh()->afterRefreshTreatment()-> if (!succeeded)
> lockManager.releaseLock(monitoringLock);')
> >>>>
> >>>> * 'VdsManager,refreshImpl' catches the network exception, marks
> 'releaseLock = true' and *tries to release the already released lock*.
> >>>>
> >>>> The following warning is printed to the log -
> >>>>
> >>>> WARN [org.ovirt.engine.core.bll.lock.InMemoryLockManager]
> (EE-ManagedThreadFactory-engineScheduled-Thread-53) [] Trying to release
> exclusive lock which does not exist, lock key: 'ecf53d69-eb68-4b11-8df2-
> c4aa4e19bd93VDS_INIT'
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> *- 08:30:51 a successful getCapabilitiesAsync is sent.*
> >>>>
> >>>>
> >>>> *- 08:32:55 - The failing test starts (Setup Networks for setting
> ipv6). *
> >>>>
> >>>> * SetupNetworks takes the monitoring lock.
> >>>>
> >>>> *- 08:33:00 - ResponseTracker cleans the getCapabilitiesAsync
> requests from 4 minutes ago from its queue and prints a
> VDSNetworkException: Vds timeout occured.*
> >>>>
> >>>> * When the first request is removed from the queue
> ('ResponseTracker.remove()'), the
> >>>> *'Callback.onFailure' is invoked (for the second time) -> monitoring
> lock is released (the lock taken by the SetupNetworks!).*
> >>>>
> >>>> * *The other requests removed from the queue also try to
> release the monitoring lock*, but there is nothing to release.
> >>>>
> >>>> * The following warning log is printed -
> >>>> WARN [org.ovirt.engine.core.bll.lock.InMemoryLockManager]
> (EE-ManagedThreadFactory-engineScheduled-Thread-14) [] Trying to release
> exclusive lock which does not exist, lock key: 'ecf53d69-eb68-4b11-8df2-
> c4aa4e19bd93VDS_INIT'
> >>>>
> >>>> - *08:33:00 - SetupNetwork fails on Timeout ~4 seconds after is
> started*. Why? I'm not 100% sure but I guess the late processing of the
> 'getCapabilitiesAsync' that causes losing of the monitoring lock and the
> late + mupltiple processing of failure is root cause.
> >>>>
> >>>>
> >>>> Ravi, 'getCapabilitiesAsync' failure is treated twice and the lock is
> trying to be released three times. Please share your opinion regarding how
> it should be fixed.
> >>>>
> >>>>
> >>>> Thanks,
> >>>>
> >>>> Alona.
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>>
> >>>> On Sun, Apr 8, 2018 at 1:21 PM, Dan Kenigsberg <danken at redhat.com>
> >>>> wrote:
> >>>>
> >>>>> On Sun, Apr 8, 2018 at 9:21 AM, Edward Haas <ehaas at redhat.com>
> wrote:
> >>>>>
> >>>>>>
> >>>>>>
> >>>>>> On Sun, Apr 8, 2018 at 9:15 AM, Eyal Edri <eedri at redhat.com> wrote:
> >>>>>>
> >>>>>>> Was already done by Yaniv - https://gerrit.ovirt.org/#/c/89851.
> >>>>>>> Is it still failing?
> >>>>>>>
> >>>>>>> On Sun, Apr 8, 2018 at 8:59 AM, Barak Korren <bkorren at redhat.com>
> >>>>>>> wrote:
> >>>>>>>
> >>>>>>>> On 7 April 2018 at 00:30, Dan Kenigsberg <danken at redhat.com>
> wrote:
> >>>>>>>> > No, I am afraid that we have not managed to understand why
> setting
> >>>>>>>> and
> >>>>>>>> > ipv6 address too the host off the grid. We shall continue
> >>>>>>>> researching
> >>>>>>>> > this next week.
> >>>>>>>> >
> >>>>>>>> > Edy, https://gerrit.ovirt.org/#/c/88637/ is already 4 weeks
> old,
> >>>>>>>> but
> >>>>>>>> > could it possibly be related (I really doubt that)?
> >>>>>>>> >
> >>>>>>>>
> >>>>>>>
> >>>>>> Sorry, but I do not see how this problem is related to VDSM.
> >>>>>> There is nothing that indicates that there is a VDSM problem.
> >>>>>>
> >>>>>> Has the RPC connection between Engine and VDSM failed?
> >>>>>>
> >>>>>>
> >>>>> Further up the thread, Piotr noticed that (at least on one failure of
> >>>>> this test) that the Vdsm host lost connectivity to its storage, and
> Vdsm
> >>>>> process was restarted. However, this does not seems to happen in all
> cases
> >>>>> where this test fails.
> >>>>>
> >>>>> _______________________________________________
> >>>>> Devel mailing list
> >>>>> Devel at ovirt.org
> >>>>> http://lists.ovirt.org/mailman/listinfo/devel
> >>>>>
> >>>>
> >>>>
> >>>> _______________________________________________
> >>>> Devel mailing list
> >>>> Devel at ovirt.org
> >>>> http://lists.ovirt.org/mailman/listinfo/devel
> >>>>
> >>>
> >>>
> >>>
> >>> --
> >>> *GAL bEN HAIM*
> >>> RHV DEVOPS
> >>>
> >>
> >>
> >> _______________________________________________
> >> Devel mailing list
> >> Devel at ovirt.org
> >> http://lists.ovirt.org/mailman/listinfo/devel
> >>
> _______________________________________________
> Devel mailing list
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>
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