cubicweb #2502467 Exception: try to set connections set on a closed session anonad3ead836a1042e89440bf4dd00c3bb3 [deprecated]

Seen in all-in-one.log

2012-10-09 09:46:48 - (cubicweb.web) ERROR: Exception('try to set connections set on a closed session anonad3ead836a1042e89440bf4dd00c3bb3',)
Traceback (most recent call last):
File "/usr/lib/python2.6/dist-packages/cubicweb/web/application.py", line 443, in core_handle
  result = controller.publish(rset=rset)
File "/usr/lib/python2.6/dist-packages/cubicweb/web/views/basecontrollers.py", line 133, in publish
  rset=rset, view=view)
File "/usr/lib/python2.6/dist-packages/cubicweb/cwvreg.py", line 373, in main_template
  res = obj.render(**kwargs)
File "/usr/lib/python2.6/dist-packages/cubicweb/view.py", line 176, in render
  view_func(**context)
File "/usr/lib/python2.6/dist-packages/cubicweb/web/views/basetemplates.py", line 114, in call
  view.render()
File "/usr/lib/python2.6/dist-packages/cubicweb/view.py", line 176, in render
  view_func(**context)
File "/usr/lib/python2.6/dist-packages/cubicweb/web/views/rdf.py", line 59, in call
  self.entity2graph(graph, entity)
File "/usr/lib/python2.6/dist-packages/cubicweb/web/views/rdf.py", line 101, in entity2graph
  add( (URIRef(related.cwuri), CW[rtype], cwuri) )
File "/usr/lib/python2.6/dist-packages/cubicweb/entity.py", line 1425, in __get__
  return eobj.cw_attr_value(self._attrname)
File "/usr/lib/python2.6/dist-packages/cubicweb/entity.py", line 904, in cw_attr_value
  rset = self._cw.execute(rql, {'x': self.eid})
File "/usr/lib/python2.6/dist-packages/cubicweb/dbapi.py", line 499, in execute
  build_descr=build_descr, **self._txid())
File "/usr/lib/python2.6/dist-packages/cubicweb/server/repository.py", line 775, in execute
  session = self._get_session(sessionid, setcnxset=True, txid=txid)
File "/usr/lib/python2.6/dist-packages/cubicweb/server/repository.py", line 1021, in _get_session
  session.set_cnxset()
File "/usr/lib/python2.6/dist-packages/cubicweb/server/session.py", line 782, in set_cnxset
  raise Exception('try to set connections set on a closed session %s' % self.id)
Exception: try to set connections set on a closed session anonad3ead836a1042e89440bf4dd00c3bb3
prioritynormal
typebug
done in<not specified>
load0.000
load left0.000
closed by<not specified>