How do you design a multi-region active-active system in Java microservices?

Active-active systems serve traffic from multiple regions simultaneously with replication and conflict handling.

Traffic is routed via geo-DNS or global load balancers. Each region runs full-stack microservices. Data is replicated asynchronously or via quorum-based systems. Conflict resolution is critical for writes. Stateless services scale easily, but stateful components require careful partitioning or CRDT-based models.