### Summary Upgrade from CE 12.10.8 to CE 13.0.10 fails with config error `idle_in_transaction_session_timeout` ### Steps to reproduce Upgrade from CE 12.10.8 to CE 13.0.10 OS System is Ubuntu **Xenial with Postgres 9.5** ### What is the current *bug* behavior? ``` Recipe: gitlab::database_migrations * bash[migrate gitlab-rails database] action run [execute] rake aborted! StandardError: An error has occurred, this and all later migrations canceled: PG::UndefinedObject: ERROR: unrecognized configuration parameter "idle_in_transaction_session_timeout" /opt/gitlab/embedded/service/gitlab-rails/lib/gitlab/database/with_lock_retries.rb:148:in `execute' ``` ### What is the expected *correct* behavior? The Postgres variable idle_in_transaction_session_timeout has been introduced in Postgres 9.6. **Postgres version 9.5 does not have such a setting** which is part of Ubuntu 16 LTS (Xenial) ### Possible fixes Open the file with_lock_retries.rb and comment the two `execute` statements containing the `idle_in_transaction_session_timeout` statements.