Re: [Xen-devel] [xen-4.9-testing test] 126201: regressions - FAIL

[Roger Pau Monné <roger.pau@xxxxxxxxxx>]

On Tue, Aug 21, 2018 at 05:14:54AM -0600, Jan Beulich wrote:
> >>> On 21.08.18 at 03:11, <osstest-admin@xxxxxxxxxxxxxx> wrote:
> > flight 126201 xen-4.9-testing real [real]
> > http://logs.test-lab.xenproject.org/osstest/logs/126201/ 
> > 
> > Regressions :-(
> > 
> > Tests which did not succeed and are blocking,
> > including tests which could not be run:
> >  test-amd64-amd64-libvirt-pair 22 guest-migrate/src_host/dst_host fail 
> > REGR. vs. 124328
> 
> Something needs to be done about this, as this continued failure is
> blocking the 4.9.3 release. I did mail about this on Aug 2nd already
> for flight 125710, I've got back from Wei:
> 
> >This is libvirtd's error message.
> >
> >The remote host can't obtain the state change log due to it is already
> >held by another task/thread. It could be a libvirt / libxl bug.
> >
> >2018-08-01 16:12:13.433+0000: 3491: warning : libxlDomainObjBeginJob:151 :
> >Cannot start job (modify) for domain debian.guest.osstest; current job is 
> >(modify) owned by (24975)

Seems like the error is mostly the same, this happens on the
destination host, and from the libvirt log:

2018-08-19 17:05:19.183+0000: 24982: debug : virEventPollInterruptLocked:726 : 
Interrupting
2018-08-19 17:05:19.183+0000: 24982: info : virEventPollAddTimeout:253 : 
EVENT_POLL_ADD_TIMEOUT: timer=3 frequency=60000 cb=0x7f84db8bf87e 
opaque=0x7f84a00f7240 ff=0x7f84db8bf632
2018-08-19 17:05:19.183+0000: 24982: debug : libvirt_vmessage:76 : 
libvirt_vmessage: context='libxl' format='%s%s%s%s%s%s'
2018-08-19 17:05:19.183+0000: 24982: info : virEventPollUpdateHandle:152 : 
EVENT_POLL_UPDATE_HANDLE: watch=10 events=5
2018-08-19 17:05:19.183+0000: 24982: debug : virEventPollInterruptLocked:726 : 
Interrupting
2018-08-19 17:05:19.188+0000: 24982: debug : libvirt_vmessage:76 : 
libvirt_vmessage: context='libxl' format='%s%s%s%s%s%s'
2018-08-19 17:05:19.188+0000: 24982: debug : libvirt_vmessage:76 : 
libvirt_vmessage: context='libxl' format='%s%s%s%s%s%s'
[...]
2018-08-19 17:05:49.253+0000: 3492: warning : libxlDomainObjBeginJob:151 : 
Cannot start job (modify) for domain debian.guest.osstest; current job is 
(modify) owned by (24982)
2018-08-19 17:05:49.253+0000: 3492: error : libxlDomainObjBeginJob:155 : Timed 
out during operation: cannot acquire state change lock

I have however no idea of what's going on.

> The apparently same issue is blocking 4.7, and I think it is only
> because of some earlier force-push and/or "fail pass in" that 4.8
> and 4.6 aren't blocked by this. The failures look to always be on
> the joubertins. 4.10, 4.11, and master all have entries on these
> hosts (some not very new, but anyway), and hence might be
> fine.

AFAICT it only happens with Xen <= 4.9?

Roger.

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