Description Florian Best 2022-05-06 16:11:38 CEST

The polling in UVMM does not stop if one is logged out.

UVMM should watch for login and logout events and stop/start its polling based on this.
This causes a memory leak in UMC-Server (Bug #52361):

(In reply to Florian Best from comment #4)
> (In reply to Florian Best from comment #3)
> > The logs are full of messages like:
> > 06.05.22 10:27:12.116  MAIN        ( WARN    ) : Module None (command=u'uvmm/query', id=u'165182563204742-873172') does not exists anymore
> > 06.05.22 10:27:12.130  MAIN        ( WARN    ) : Module None (command=u'uvmm/node/query', id=u'165182563204952-873173') does not exists anymore
> > 06.05.22 10:27:12.139  MAIN        ( WARN    ) : Module None (command=u'uvmm/cloud/query', id=u'165182563205075-873174') does not exists anymore
> My theory about this:
> The UVMM module doesn't stop the polling if one is logged out (e.g. due to
> SAML session end time (=5 minutes), UMC-Webserver restarts, etc.)
> This causes that the request is made but the reloaded ACL's don't know this
> module anymore and therefore this message is raised.
> The code then does:
>  493 »   »   »   CORE.warn('Module %r (command=%r, id=%r) does not exists
> anymore' % (module_name, command, msg.id))
>  494 »   »   »   moduleManager.load()
>  495 »   »   »   self._reload_acls_and_permitted_commands()
> 
> which was causing the memory leak as explained in Bug #52361 comment 0.