Activating a module through the wizard when clean_timeout=0 results in an empty pool
With clean_timeout = 0
, installing the wizard will result in a notification event in postgres which will be caught by the listener thread of the other processes and trigger the refresh of the pool for those processes.
The issue is that the thread doing the update will also end up with an empty pool and thus it will fail.
All subsequent request to trytond will also fail.