I got this test failing on one of the builds: ( http://jenkins.ovirt.org/job/vdsm_master_check-patch-el7-x86_64/5266/console ) *09:39:16* ======================================================================*09:39:16* FAIL: testTimeout (storage_iscsi_test.RescanTimeoutTests)*09:39:16* ----------------------------------------------------------------------*09:39:16* Traceback (most recent call last):*09:39:16* File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/monkeypatch.py", line 133, in wrapper*09:39:16* return f(*args, **kw)*09:39:16* File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/monkeypatch.py", line 133, in wrapper*09:39:16* return f(*args, **kw)*09:39:16* File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/storage_iscsi_test.py", line 45, in testTimeout*09:39:16* iscsi.rescan()*09:39:16* File "/usr/lib64/python2.7/contextlib.py", line 24, in __exit__*09:39:16* self.gen.next()*09:39:16* File "/home/jenkins/workspace/vdsm_master_check-patch-el7-x86_64/vdsm/tests/storage_iscsi_test.py", line 33, in assertMaxDuration*09:39:16* (elapsed, maxtime))*09:39:16* AssertionError: Operation was too slow 1.32s > 1.20s*09:39:16* -------------------- >> begin captured logging << --------------------*09:39:16* 2016-12-26 09:36:46,857 DEBUG (MainThread) [storage.SamplingMethod] Trying to enter sampling method (vdsm.storage.iscsi.rescan) (misc:467)*09:39:16* 2016-12-26 09:36:46,857 DEBUG (MainThread) [storage.SamplingMethod] Got in to sampling method (misc:470)*09:39:16* 2016-12-26 09:36:46,857 DEBUG (MainThread) [storage.ISCSI] Performing SCSI scan, this will take up to 1 seconds (iscsi:457)*09:39:16* 2016-12-26 09:36:46,858 DEBUG (MainThread) [root] /usr/bin/taskset --cpu-list 0-3 sleep 2 (cwd None) (commands:69)*09:39:16* 2016-12-26 09:36:48,183 DEBUG (MainThread) [storage.SamplingMethod] Returning last result (misc:477)*09:39:16* --------------------- >> end captured logging << --------------------- I was surprised that it uses a time measurement to determine success. Edy.