On Jan 21, 2009, at 5:22 AM, Smoke wrote:
> > Hi, > > I'm not a SQLAchemy expert ( just an average user... ). I have an > application that's causing me some problems... It's a monitoring > application that connects to a MS Sql Server, so it's always on. > Sometimes happens that casualy I have a DBAPIError with pyodbc. The > error is something like [Microsoft][ODBC Driver Manager] Driver's > SQLAllocHandle on SQL_HANDLE_DBC failed .... After the first time I > have this error every other DB operation generates this Error. > So.. what I would like to do is completely close ( kill ) che active > connection pool and recreate it. My code is somethink like this: > > sa_engine=sa.create_engine(dbUri, echo=False, strategy='threadlocal') > sa_Session = sa.orm.scoped_session( sessionmaker(bind=sa_engine, > autoflush=False) ) > metadata = sa.MetaData(sa_engine) > sa_session = sa_Session() > > and then: > > sa_session.close() > sa_Session.close_all() > sa_engine.dispose() > del sa_session > del sa_Session > del sa_engine > > But after executing this Sql Server Profiler tells me that the > connection is still opened. The only way is to kill the application. > My sqlalchemy.__version__ is 0.4.8 assuming no other connections are checked out, that would close all connections. its possible the DBAPI is just not able to close the connection fully. try with a raw pyodbc application to see if this is the case. Other things to try are to use the NullPool with create_engine() which doesn't pool connections. Its also extremely unlikely that you should be using "strategy='threadlocal'" unless you are calling begin()/commit() from your Engine directly so you might want to take that out. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To post to this group, send email to sqlalchemy@googlegroups.com To unsubscribe from this group, send email to sqlalchemy+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/sqlalchemy?hl=en -~----------~----~----~----~------~----~------~--~---
