Created attachment 600294 [details] vdsm.log Discover Targets via the GUI sometimes returns an empty list. Clicking on Discover again refreshes the list and populates it this time. Logs include a failed Discover Targets (one before last) and then a successful Discover Targets (last).
Created attachment 600295 [details] engine.log
from looking at the logs, It looks like admin-portal refresh issue and not engine, since on both attempts, it appears that engine returns list of targets, so it's a UI problem, what do you think?
Looks like a refresh problem indeed - moving to webadmin component.
http://gerrit.ovirt.org/#/c/6702/
commit fb361b958071a5d8b93350c385e3856a51ffcb51
si14. Didn't succeed to reproduce. Tried several times with several ISCSI domains.