[ovirt-devel] Re: Vdsm: Failing test_no_match

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?