Thank you for the advice. I will surely try out all the suggestions to isolate the exact cause of the problem. Unfortunately, today of all days is the annual maintenance and the system is down. I will try to reproduce the problem on a similar system.
According to our database administrator, idle connections are actively killed by some job running on the database. Thus, it is not a classic timeout or something between client and database, but the connection gets dropped by the database itself. -- SQLAlchemy - The Python SQL Toolkit and Object Relational Mapper http://www.sqlalchemy.org/ To post example code, please provide an MCVE: Minimal, Complete, and Verifiable Example. See http://stackoverflow.com/help/mcve for a full description. --- You received this message because you are subscribed to the Google Groups "sqlalchemy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sqlalchemy+unsubscr...@googlegroups.com. To post to this group, send email to sqlalchemy@googlegroups.com. Visit this group at https://groups.google.com/group/sqlalchemy. For more options, visit https://groups.google.com/d/optout.
