PostgreSQL throws "Connection has been abandoned" -> "An I/O error occurred while sending to the backend"
This is usually thrown by PostgreSQL when the connection is dropped on the back-end side.
- Try updating the driver to the latest version: 9.4-1202
- In
postgresql.conf
try setting:log_statement = 'all'
, to see all statement log data, so you can better understand what's causing the issue.