It seems that queue having throttled items is still actual problem for LLD preprocessing?
Can you please check?
How to reproduce
- Setup host with agent and MySQL DB
- Assign host to proxy in active mode
- Assign template Template DB MySQL
After some time, Replication discovery and Databases discovery can be seen in the queue.
Those rules have Discard with heartbeat 1d
Thanks to Maxim Chudinov for checking