Hi, There is a new failure in master, on 'snapshot_merge' test(not live), vdsm.log shows: 2016-12-13 09:57:30,399 ERROR (tasks/0) [storage.Image] delete() takes exactly 4 arguments (3 given) (image:1321) Traceback (most recent call last): File "/usr/share/vdsm/storage/image.py", line 1309, in merge sdDom, srcVolParams, volParams, reqSize, chain) File "/usr/share/vdsm/storage/image.py", line 1068, in _baseCowVolumeMerge tmpVol.delete(postZero=False, force=True) TypeError: delete() takes exactly 4 arguments (3 given) 2016-12-13 09:57:30,401 ERROR (tasks/0) [storage.TaskManager.Task] (Task='085bee3e-681f-4e3f-9b37-d9abbd6b2903') Unexpected error (task:870) Traceback (most recent call last): File "/usr/share/vdsm/storage/task.py", line 877, in _run return fn(*args, **kargs) File "/usr/share/vdsm/storage/task.py", line 333, in run return self.cmd(*self.argslist, **self.argsdict) File "/usr/lib/python2.7/site-packages/vdsm/storage/securable.py", line 79, in wrapper return method(self, *args, **kwargs) File "/usr/share/vdsm/storage/sp.py", line 1837, in mergeSnapshots discard) File "/usr/share/vdsm/storage/image.py", line 1322, in merge raise se.SourceImageActionError(imgUUID, sdUUID, str(e)) This failure is from recent hours. The hosts and engine logs can be found here[1] Could someone take a look? Thanks, Nadav. [1] http://jenkins.ovirt.org/job/test-repo_ovirt_experimental_master/4160/artifa...