Red Hat Bugzilla – Bug 1310624
events are flooded with 'Refresh image list succeeded for domain(s):' when console is open
Last modified: 2017-02-13 09:41:06 EST
Created attachment 1129236 [details]
event print screen
Description of problem:
due to foreign menu feature the events are folded with " Refresh image list succeeded for domain(s): XXX (All file type) event.
Version-Release number of selected component (if applicable):
Red Hat Enterprise Virtualization Manager Version: 126.96.36.199-0.1.el6
Steps to Reproduce:
1.connect to webadmin (with fqdn)
2.open console to a running VM and look at the events
note: an ISO domain should be attached.
Created attachment 1129251 [details]
the engine log is also flooded .
HA reservation status log every 5s should also be tackled
It shouldn't be so often, right?
iirc remote-viewer is getting the ISO list every 5 seconds.
As I could not find a way to get a notification when a new ISO appears, I had to make a guess as to how long a user will accept to wait for an ISO to appear in the foreign menu after it's added to the ISO domain.
Well, I wouldn't do that unless someone opens the menu. Would that be a big change? It's a small delay, but I think it's better than refreshing so often. Otherwise this can be used as a keepalive mechanism:) what do you think?
I think (haven't tested) the menu is going to get closed if something changes while the menu is opened. And I don't think that's a very good UI if you want to use an ISO you just added to the domain, especially if the connection to the ovirt instance is slow.
But apart from your suggestion or the current polling, I can't really think of a smart way of doing things (well, apart from getting events from oVirt but I'm not holding my breath for that ;)
But imagine we have hundreds of clients concurrently accessing the VMs using remote viewer. Only the amount of data transferred over the line every 5 seconds is going to be significant. Not to mention the additional load on the engine side.
Any chance you could investigate a bit more the Michal's suggestion with loading only when the menu opens? Because we are not getting events in near future for sure even we all would love to see them :)
We could do the refresh much less often (how often would be acceptable ? every 5 minutes ?) and have Michal's suggestion as a poor-man's refresh. But in situations like in bug #1310450 (look at CD menu, disable ISO damain, look at CD menu), things are going to be odd.
Every 5 minutes sounds good enough - you typically don't change the content of the ISO domain too often.
What you mean by odd? The fact that you will see one CD in the menu and when open than it will disappear? Or something else?
(In reply to Tomas Jelinek from comment #10)
> What you mean by odd? The fact that you will see one CD in the menu and when
> open than it will disappear? Or something else?
I'm not fully sure about the exact behaviour if the list changes while the menu is opened. But if you are on a slow link and add a new ISO that you want to use,
you'll open the menu, the ISO is not there, you wait a bit, open the menu (assuming you decide to try again!), the ISO is magically there. That's very unexpected ;)
(In reply to Christophe Fergeau from comment #11)
> you'll open the menu, the ISO is not there, you wait a bit, open the menu
> (assuming you decide to try again!), the ISO is magically there. That's very
> unexpected ;)
than the only thing I can think of is a specific "refresh" button in the menu. Not beautiful but at least no polling needed at all and the user will know why did the new ISO magically appeared.
I think we can go with the suggestion from comment #9, but I'm not going to be hugely enthusiastic when bugs are reported against this behaviour...
(In reply to Christophe Fergeau from comment #13)
> I think we can go with the suggestion from comment #9, but I'm not going to
> be hugely enthusiastic when bugs are reported against this behaviour...
if there could be some kind of a loading indicator somewhere indicating that you are loading the new list the behavior would be much less odd. Do you think you could put it somewhere?
@Christophe: so how have you decided?
So, this is a virt-viewer issue, yes. I will investigate a way of doing this check only on demand, or as last resource We could adopt the longer timer for a quick fix.
I posted patch series to the mailing list replacing the menu item with a dedicated dialog for this task.
Code is now upstream, Change CD is now under "File" menu and it shows the ISO list as a dialog.