Technologies/Apache Kafka/kafka.replication.active_controller_count
Apache KafkaApache KafkaMetric

kafka.replication.active_controller_count

Active controller count
Dimensions:None
Available on:DatadogDatadog (1)DynatraceDynatrace (1)
Interface Metrics (2)
DatadogDatadog
Number of active controllers in the cluster.
Dimensions:None
DynatraceDynatrace
The number of active controllers in the cluster
Dimensions:None
Sources
kafka.replication.active_controller_countgithub.com
kafka.controller.KafkaController.ActiveControllerCount.Valuewww.dynatrace.com
Related Insights (1)
Controller Split-Brain Risk from Multiple Active Controllerscritical

Only one Kafka controller should be active cluster-wide. If kafka.replication.active_controller_count shows values other than 1 on any broker (0 on followers, 1 on controller), it indicates controller election issues or split-brain scenarios.

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