I've run into an interesting problem. A legacy bit of code basically does
this:
sess = session_factory()
while stuff_to_do:
sess.begin()
sometimes_add_stuff_to_sess()
if some_condition:
sess.rollback()
continue
other_stuff_here()
sess.commit()
I was getting this error:
File "/path/to/the/code.py", line 134, in update_database
sess.commit()
File "/usr/lib64/python2.6/site-packages/sqlalchemy/orm/session.py", line
789, in commit
self.transaction.commit()
File "/usr/lib64/python2.6/site-packages/sqlalchemy/orm/session.py", line
401, in commit
self._remove_snapshot()
File "/usr/lib64/python2.6/site-packages/sqlalchemy/orm/session.py", line
303, in _remove_snapshot
for s in self._deleted:
File "/usr/lib64/python2.6/weakref.py", line 303, in iterkeys
for wr in self.data.iterkeys():
RuntimeError: dictionary changed size during iter
If I add a sess.close() right before the sess.rollback() then I'm
good-to-go.
Is this expected?
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