[ovirt-devel] Re: Vdsm: Failing test_no_match

On Thu, Nov 22, 2018 at 2:08 PM Milan Zamazal <mzamazal(a)redhat.com&gt; wrote: > Nir Soffer <nsoffer(a)redhat.com&gt; writes: > > > On Wed, Nov 21, 2018, 17:46 Milan Zamazal <mzamazal(a)redhat.com wrote: > > > >> Hi, test_no_match fails on CI most of the time (but not always) in > >> https://gerrit.ovirt.org/95518: > >> > >> _____________________________ test_no_match[qcow2] > >> _____________________________ > >> 11:30:16 > >> 11:30:16 tmpdir = local('/var/tmp/vdsm/test_no_match_qcow2_0'), > >> image_format = 'qcow2' > >> 11:30:16 > >> 11:30:16 def test_no_match(tmpdir, image_format): > >> 11:30:16 path = str(tmpdir.join('test.' + image_format)) > >> 11:30:16 op = qemuimg.create(path, '1m', image_format) > >> 11:30:16 op.run() > >> 11:30:16 qemuio.write_pattern(path, image_format, pattern=2) > >> 11:30:16 with pytest.raises(qemuio.VerificationError): > >> 11:30:16 > qemuio.verify_pattern(path, image_format, > pattern=4) > >> 11:30:16 > >> 11:30:16 storage/qemuio_test.py:59: > >> 11:30:16 _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ > _ _ > >> _ _ _ _ _ _ _ _ > >> 11:30:16 > >> 11:30:16 path = '/var/tmp/vdsm/test_no_match_qcow2_0/test.qcow2', > format > >> = 'qcow2' > >> 11:30:16 offset = 512, len = 1024, pattern = 4 > >> 11:30:16 > >> 11:30:16 def verify_pattern(path, format, offset=512, len=1024, > >> pattern=5): > >> 11:30:16 read_cmd = 'read -P %d -s 0 -l %d %d %d' % (pattern, > >> len, offset, len) > >> 11:30:16 cmd = ['qemu-io', '-f', format, '-c', read_cmd, path] > >> 11:30:16 rc, out, err = commands.execCmd(cmd, raw=True) > >> 11:30:16 if rc != 0 or err != b"": > >> 11:30:16 > raise cmdutils.Error(cmd, rc, out, err) > >> 11:30:16 E Error: Command ['qemu-io', '-f', 'qcow2', '-c', > >> 'read -P 4 -s 0 -l 1024 512 1024', > >> '/var/tmp/vdsm/test_no_match_qcow2_0/test.qcow2'] failed with rc=1 > >> out='Pattern verification failed at offset 512, 1024 bytes\nread > 1024/1024 > >> bytes at offset 512\n1 KiB, 1 ops; 0.0002 sec (3.756 MiB/sec and > 3846.1538 > >> ops/sec)\n' err='' > >> 11:30:16 > >> 11:30:16 storage/qemuio.py:50: Error > >> > >> (Similarly for raw.) > >> > >> You can see the complete test run log here (or in other CI runs of the > >> patch): > >> > >> > https://jenkins.ovirt.org/job/vdsm_master_check-patch-fc28-x86_64/2040/co... > >> > >> It fails on both Fedora and CentOS. It may or may not be related to the > >> fact that QEMU 2.11 is used in the failed runs. > >> > >> Any idea what could be wrong? > > > > > > Yes. Qemu-io was fixed lately to fail when pattern does not match, but > our > > wrapper still expects the old behaviour (return 0, log warning). > > I see, thank you for explanation. > > > Are you sure you run 2.11 and not 2.12? > > Actually not. Looking into the CI log once more, I can see it reports > initially installed QEMU version before additional repos are added. > There are no reports on QEMU versions or upgrades afterwards but that > may be just silence of some automation script. Since new QEMU version > would be expected with the added repos and it would explain the test > failure, let's assume it's indeed a newer QEMU. > > > We will fix this soon. > > OK, thank you. We can disable the test temporarily in our patches > updating repos & requirements and re-enable it before merge or later, > depending on availability of your fix. > I cannot reproduce the error on Fedora 28 (qemu-img-2.12.0-0.5.rc1.fc28.x86_64)

but I hope this change will fix your setup.