What is the behaviour of connection failure between masters in multi-master setup?

Hi @guydewinton

Welcome to YugabyteDB Forum!

You need an odd number of servers and we recommend a minimum of 3 in a cluster. See replication docs: Deploy | YugabyteDB Docs.

In this case, the 2 remaining servers will continue serving reads + writes.

Regards,
Dorian
Technical Support Engineer