Synnefo

This exception has been reported from the deployment:

Aug  1 20:50:14 worker1 2011-08-01 17:50:14,672 - synnefo.dispatcher[19468] - ERROR - Unexpected error#012Traceback (most recent call last):#012  File "/srv/okeanos/
synnefo/logic/callbacks.py", line 61, in update_db#012    msg["status"], msg["logmsg"])#012  File "/usr/lib/pymodules/python2.6/django/db/transaction.py", line 299,
in _commit_on_success#012    res = func(*args, **kw)#012  File "/srv/okeanos/synnefo/logic/backend.py", line 92, in process_op_status#012    vm.save()#012  File "/us
r/lib/pymodules/python2.6/django/db/models/base.py", line 434, in save#012    self.save_base(using=using, force_insert=force_insert, force_update=force_update)#012
File "/usr/lib/pymodules/python2.6/django/db/models/base.py", line 500, in save_base#012    rows = manager.using(using).filter(pk=pk_val)._update(values)#012  File " 
/usr/lib/pymodules/python2.6/django/db/models/query.py", line 491, in _update#012    return query.get_compiler(self.db).execute_sql(None)#012  File "/usr/lib/pymodul
es/python2.6/django/db/models/sql
/compiler.py", line 861, in execute_sql#012    cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)#012  File "/usr/lib/pymodules/python2.6/django/db/mod
els/sql/compiler.py", line 727, in execute_sql#012    cursor.execute(sql, params)#012  File "/usr/lib/pymodules/python2.6/django/db/backends/mysql/base.py", line 86,
 in execute#012    return self.cursor.execute(query, args)#012  File "/usr/lib/pymodules/python2.6/MySQLdb/cursors.py", line 166, in execute#012    self.errorhandler
(self, exc, value)#012  File "/usr/lib/pymodules/python2.6/MySQLdb/connections.py", line 35, in defaulterrorhandler#012    raise errorclass, errorvalue#012Operationa
lError: (1213, 'Deadlock found when trying to get lock; try restarting transaction')

Need to reproduce it and understand its cause.
Interaction with the transaction consistency model?
Switch to manual transaction handling instead of relying on Django for transaction management?