Description Philipp Hahn 2013-10-14 12:27:34 CEST

After restarting UMC-server and UVMM two requests "uvmm/node/query"s are sent in short succession from the web-frontent, where the 2nd call fails with the following traceback:

==> management-console-module-uvmm.log <==
11.10.13 22:51:42.376  MODULE      ( PROCESS ) : An internal error occurred:   File "/usr/lib/pymodules/python2.6/notifier/threads.py", line 82, in _run
    tmp = self._function()
  File "/usr/lib/pymodules/python2.6/notifier/__init__.py", line 104, in __call__
    return self._function( *tmp, **self._kwargs )
  File "/usr/lib/pymodules/python2.6/univention/management/console/modules/uvmm/uvmmd.py", line 84, in request
    raise UVMM_Error(str(ex))
UVMM_Error: Not a valid Packet: 'module' object has no attribute 'DomainTemplate'


I could not reproduce it with "umcp-command uvmm/node/qeuery" or "uvmm nodes default".

I think that src/univention/uvmm/protocol.py:23 creates a PicklingError, which is re-raised as a PacketError.
This is translated to a ClientError in src/univention/uvmm/client.py to a ClientError, which is caught in umc/python/umv/uvmmd.py:81

The UMC Python backend process opens a new connection for each request, so there's probably a concurrency error somewhere in UVMMd or Python.