On Thu, Oct 25, 2018 at 9:26 AM Sebastian Meinhardt <seb.meinha...@gmail.com> wrote: > > 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.
OK, so I believe your script should be using KILL SESSION, I've just tried this and the effects are immediate: >>> from sqlalchemy import * >>> e = create_engine("oracle://scott:tiger@oracle1120") >>> conn = e.connect() >>> conn.scalar("select 1 from dual") 1 then in the DB console as SYS: SQL> alter system kill session '118,59061'; then: >>> conn.scalar("select 1 from dual") Traceback (most recent call last): File "/home/classic/dev/sqlalchemy/lib/sqlalchemy/engine/base.py", line 1193, in _execute_context context) File "/home/classic/dev/sqlalchemy/lib/sqlalchemy/engine/default.py", line 509, in do_execute cursor.execute(statement, parameters) cx_Oracle.DatabaseError: ORA-00028: your session has been killed .. etc the response was immediate and the client was told exactly what had happened. > > -- > 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. -- 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.