Hello,
In my application I have a function that looks more or less like this
def run(self):
# process first object in sequence
for firstObject in firstObjects:
self.session.add(firstObject)
self.session.commit()
# process second object in sequence
# lots of these, so break along the way
count = 0
for secondObject in secondObjects:
self.session.add(secondObject)
count += 1
if (count > 100):
#**********************************
self.session.commit()
#**********************************
count = 0
time.sleep(1) # pause to let other process access
the db
self.session.commit()
# process third objects
for thirdObject in thirdObjects:
self.session.add(thirdObject)
self.session.commit()
The commit nested inside the second loop (highlighted by asterisks) is
potentially called many times (occasionally there are thousands of
objects to deal with). intermittently that commit will produce the
following error:
Traceback (most recent call last):
File "C:\StagingService.py", line 106, in __init__
self.run(self.pushPath,self.stagingPath)
File "C:\StagingService.py", line 231, in run
self.session.commit()
File "c:\python25\Lib\site-packages\sqlalchemy\orm\session.py", line
673, in commit
self.transaction.commit()
File "c:\python25\Lib\site-packages\sqlalchemy\orm\session.py", line
378, in commit
self._prepare_impl()
File "c:\python25\Lib\site-packages\sqlalchemy\orm\session.py", line
351, in _prepare_impl
self._assert_is_active()
File "c:\python25\Lib\site-packages\sqlalchemy\orm\session.py", line
247, in _assert_is_active
"The transaction is inactive due to a rollback in a "
InvalidRequestError: The transaction is inactive due to a rollback in
a subtransaction. Issue rollback() to cancel the transaction.
I've read elsewhere in this group (http://groups.google.com/group/
sqlalchemy/browse_thread/thread/b87af73232998fe4) about this error
message, but I'm not sure what they mean by "squelching the original
exception somewhere". Can someone please help me understand why I'm
getting this error and ideas on how to fix it.
Thanks.
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