Internal Server Error when saving a cluster without Router IP

Bug #1441933 reported by Andres Rodriguez on 2015-04-09
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
MAAS
Critical
Raphaël Badin
1.7
Critical
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 [-] 127.0.0.1 - - [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,0,127.0.0.1] 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/wsgi.py", line 315, in run
     appIterator = self.application(self.environ, self.startResponse)
   File "/usr/lib/python2.7/dist-packages/django/core/handlers/wsgi.py", line 206, in __call__
     response = self.get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/views.py", line 181, in get_response
     response = get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/views.py", line 170, in get_response
     request, get_resolver(None), sys.exc_info())
 --- <exception caught here> ---
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/views.py", line 155, in get_response
     return django_get_response(request)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/orm.py", line 331, in __exit__
     self.fire()
   File "/usr/lib/python2.7/dist-packages/provisioningserver/utils/twisted.py", line 151, in wrapper
     return func(*args, **kwargs)
   File "/usr/lib/python2.7/dist-packages/maasserver/utils/async.py", line 180, in fire
     self._fire_in_reactor(hook).wait()
   File "/usr/lib/python2.7/dist-packages/crochet/_eventloop.py", line 219, in wait
     result.raiseException()
   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 1.7http://paste.ubuntu.com/10776002/

Raphaël Badin (rvb) wrote :

Here is a full stacktrace: http://paste.ubuntu.com/10781115/

(I just hacked /usr/lib/python2.7/dist-packages/crochet/_eventloop.py 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.

[1]:http://people.canonical.com/~ubuntu-archive/pending-sru.html

tags: added: verification-done
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