Created attachment 1365833 [details] logs(engine,vdsm) Description of problem: Setup with: Engine: Version:4.2.1-0.0.master.20171208150048.git77336e3.el7.centos Host 4.1: vdsm-4.19.41-1.el7ev host is at cluster 4.1 on engine with 4.2 version (master in this case) Steps: 1. Run VM on 4.1 host 2. Hot plug device (like memory) 3. Hot plug again device (like memory) Results: Can hot plug more devices, since all the devices configuration are clean like Graphics protocol which was set to SPICE set to None See screenshots Error message: Cannot edit VM. Illegal number of monitors is provided, max allowed number of monitors is 1 for VNC and the max number in the ValidNumOfMonitors configuration variable for SPICE.
Created attachment 1365834 [details] operation canceled
Created attachment 1365835 [details] pending changes dialog
Created attachment 1365837 [details] graphics - spice set to None
Created attachment 1365889 [details] engine_log
did you test with or without the fix for bug 1522901?
The fix is for 4.20 vdsm, i running the VM on 4.1 host with vdsm 4.19 so the fix will not related to this case.
sorry, I've meant engine-side fix bug 1523415. But it seems it does need one additional patch.
its in now, so please try with that one.
fix part of bug 1523415 keeping around for independent verification
Recheck it with fix: Engine: Software Version:4.2.1-0.0.master.20171211205712.git7b1f4d1.el7.centos vdsm 4.1: vdsm-4.19.42-1.el7ev.x86_64 vdsm 4.2: vdsm-4.20.9-30.gite026991.el7.centos Tested with 4.1 and 4.2 hosts
Verify with: https://bugzilla.redhat.com/show_bug.cgi?id=1524330#c10
This bugzilla is included in oVirt 4.2.0 release, published on Dec 20th 2017. Since the problem described in this bug report should be resolved in oVirt 4.2.0 release, published on Dec 20th 2017, it has been closed with a resolution of CURRENT RELEASE. If the solution does not work for you, please open a new bug report.