>Thanks for the report.
>Can you please summarize how you solved the wrong-vlan issue? Thanks.

Actually, this isn't very clear. After changing the ovirtmgmt VLAN, I wasn't 
able to access the web interface anymore (or even to ping the FQDN of the 
hosted-engine VM).
After trying a lot of different things with no success, I decided to reboot the 
hypervisor.
I don't know if this reboot was a wrong idea, but I started to realize the VM 
wasn't really started :
- hosted-engine --vm-status was showing as if the VM was started but with 
"unkown stale data"
- vdsClient -s 0 list was showing the VM as down with "exitMessage = Failed to 
acquire lock: No space left on device"

I tried everything about maintenance mode / stopping VM / starting it with 
ovirt commands, but the VM was not starting, it was crashing with this error 
message above (and unreachable from network of course)
I found out there was an option in hosted-engine command to reinitialze 
lockspace but I still had the same error.

Before deleting everything on my NFS data domain, I tried to delete the file 
called __DIRECT_IO_TEST__ which seems to be a lock file (there is no 
documentation at all concerning this, from what I can see) and I've been lucky 
: the VM started again, with a good status and was accessible.

So there are 3 points I don't understand :
1) On the hypervisor, every config file and configuration I could get related 
to ovirtmgmt didn't have any VLAN option : does it mean from the moment I 
changed this VLAN option on the VM its link with the hypervisor has been cut 
and the information about the VLAN in the VM didn't come back to the hypervisor 
?
2) The fact hosted-engine --reinitialize-lockspace didn't 
reinitialize-lockspace correctly and had to do it manually...And only deleting 
this file manually make everything work again....
3) After this file was deleted, why I was able to ping and contact again my VM 
while it was still configured on another wrong VLAN, I should have lost 
connectivity completely

Maybe some of these behaviors are bugs, but it's hard to guess what part to be 
able to fill a new bug report...


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