Internal Server Error when saving a cluster without Router IP

Bug #1441933 reported by Andres Rodriguez on 2015-04-09
This bug affects 1 person
Affects Status Importance Assigned to Milestone
Raphaël Badin
Raphaël Badin

Bug Description

When saving a cluster DHCP configuration without Router IP, Internal Server Error is shown in the WebUI:

==> /var/log/maas/regiond.log <==
2015-04-08 21:53:41 [-] - - [09/Apr/2015:01:53:40 +0000] "GET /MAAS/rpc/ HTTP/1.1" 200 166 "-" "Twisted PageGetter"
2015-04-08 21:53:52 [maas] WARNING: Failed to create Network when adding/editing cluster interface maas-virbr0 with error [{'ip': [u'Network with this Ip already exists.'], 'name': [u'Network with this Name already exists.']}]. This is OK if it already exists.
2015-04-08 21:53:52 [HTTPChannel,0,] 500 Error - /MAAS/clusters/0a802d12-ad44-4b26-8f8d-9665b47a49ff/interfaces/virbr0/edit/
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/twisted/web/", line 315, in run
     appIterator = self.application(self.environ, self.startResponse)
   File "/usr/lib/python2.7/dist-packages/django/core/handlers/", line 206, in __call__
     response = self.get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/", line 181, in get_response
     response = get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/", line 170, in get_response
     request, get_resolver(None), sys.exc_info())
 --- <exception caught here> ---
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/", line 155, in get_response
     return django_get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/", line 331, in __exit__
   File "/usr/lib/python2.7/dist-packages/provisioningserver/utils/", line 151, in wrapper
     return func(*args, **kwargs)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/", line 180, in fire
   File "/usr/lib/python2.7/dist-packages/crochet/", line 219, in wait
   File "<string>", line 2, in raiseException

 exceptions.AttributeError: 'NoneType' object has no attribute 'encode'

Related branches

Andres Rodriguez (andreserl) wrote :

This is also present in 1.7 and was seen in a production environment both 1.8.0b1 and 1.7.3

Changed in maas:
milestone: none → 1.8.0
no longer affects: maas/1.8
Changed in maas:
importance: Undecided → Critical
status: New → Triaged
assignee: nobody → Andres Rodriguez (andreserl)
assignee: Andres Rodriguez (andreserl) → Raphaël Badin (rvb)
status: Triaged → New
Andres Rodriguez (andreserl) wrote :

Also, It seems that at least in 1.8, it seems that even though the internal server error occurred, the setting was still saved.

This might eb the traceback in 1.7

Raphaël Badin (rvb) wrote :

Here is a full stacktrace:

(I just hacked /usr/lib/python2.7/dist-packages/crochet/ to call result.printTraceback() —that's right, that's the kind of thing you have to do to get Twisted to give you a (vaguely) meaningful stacktrace).

Raphaël Badin (rvb) on 2015-04-09
Changed in maas:
status: New → Triaged
Raphaël Badin (rvb) on 2015-04-09
Changed in maas:
status: Triaged → Fix Committed
Changed in maas:
status: Fix Committed → Fix Released
Andres Rodriguez (andreserl) wrote :

This bug has been reported and fixed on upstream MAAS. However, provided that the bug was listed on the debian changelog, this appears as needing verification for pending SRU [1]. This bug did not affect current MAAS in Ubuntu, hence setting this to verification-done to unblock pending SRU.


tags: added: verification-done
To post a comment you must log in.
This report contains Public information  Edit
Everyone can see this information.

Other bug subscribers