[dnsdist] Marking downstream Unexplained

[Alejandro Adroher Mellado]

Hi all, 

Currently I have 3 dnsdist server (one as abuse pool) and I'm planning to introduce 3 more instances.

Sometimes, maybe randomly I got the connection between servers down and up again always I one second. I have the servers monitored  with opennms and I have no news about any issue on servers or networks. But I still getting sometimes the next system event. 

System Events
=-=-=-=-=-=-=
Feb 16 11:31:42 pdns-rec-02 dnsdist[4343]: Marking downstream dnsdist-Rec-3 (xxx.xxx.xxx.36:53) as 'down'
Feb 16 11:31:42 pdns-rec-02 dnsdist[4343]: Marking downstream dnsdist-Rec-3 (xxx.xxx.xxx.36:53) as 'down'
Feb 16 11:31:43 pdns-rec-02 dnsdist[4343]: Marking downstream dnsdist-Rec-3 (xxx.xxx.xxx.36:53) as 'up'
Feb 16 11:31:43 pdns-rec-02 dnsdist[4343]: Marking downstream dnsdist-Rec-3 (xxx.xxx.xxx.36:53) as 'up'


It seems that my infrastructure are working fine.
Can I enable verbose for loggin?? 

Thanks a lot

Ale