Dan Kenigsberg has posted comments on this change.

Change subject: Bugfix update device hooks: after_update_device failure.
......................................................................


Patch Set 3: I would prefer that you didn't submit this

(1 inline comment)

....................................................
File vdsm/vm.py
Line 2988:                     vnicXML = 
hooks.before_update_device(vnicXML.toprettyxml(
Line 2989:                                                          
encoding='utf-8'),
Line 2990:                                                          self.conf)
Line 2991:                 except Exception as e:
Line 2992:                     self.log.debug('Hook script failed', 
exc_info=True)
why is this helpful? flow of control would still reach line 3000 with vnicXML 
undefined.

You should first avoid overwriting vnicXML (which was a minidom object) with a 
string. That's bad style and leads to our bug.

Then,  you can even take the before_update_device() call out of the try-block, 
so its failure won't trigger the "except" clause.
Line 2993:                     raise
Line 2994: 
Line 2995:                 self._dom.updateDeviceFlags(vnicXML,
Line 2996:                                             
libvirt.VIR_DOMAIN_AFFECT_LIVE)


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Gerrit-MessageType: comment
Gerrit-Change-Id: I0ab64f88e697e48ad2a3552d1361742846871ed8
Gerrit-PatchSet: 3
Gerrit-Project: vdsm
Gerrit-Branch: master
Gerrit-Owner: Giuseppe Vallarelli <[email protected]>
Gerrit-Reviewer: Antoni Segura Puimedon <[email protected]>
Gerrit-Reviewer: Dan Kenigsberg <[email protected]>
Gerrit-Reviewer: Giuseppe Vallarelli <[email protected]>
Gerrit-Reviewer: Livnat Peer <[email protected]>
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