| `druid.emitter.kafka.event.types` | Comma-separated event types. <br/>Supported types are `alerts`, `metrics`, `requests`, and `segment_metadata`. | no | `["metrics", "alerts"]` |
| `druid.emitter.kafka.metric.topic` | Kafka topic name for emitter's target to emit service metrics. If `event.types` contains `metrics`, this field cannot be empty. | no | none |
| `druid.emitter.kafka.alert.topic` | Kafka topic name for emitter's target to emit alerts. If `event.types` contains `alerts`, this field cannot empty. | no | none |
| `druid.emitter.kafka.request.topic` | Kafka topic name for emitter's target to emit request logs. If `event.types` contains `requests`, this field cannot be empty. | no | none |
| `druid.emitter.kafka.segmentMetadata.topic` | Kafka topic name for emitter's target to emit segment metadata. If `event.types` contains `segment_metadata`, this field cannot be empty. | no | none |
| `druid.emitter.kafka.producer.config` | JSON configuration to set additional properties to Kafka producer. | no | none |
| `druid.emitter.kafka.clusterName` | Optional value to specify the name of your Druid cluster. It can help make groups in your monitoring environment. | no | none |
| `druid.emitter.kafka.extra.dimensions` | Optional JSON configuration to specify a map of extra string dimensions for the events emitted. These can help make groups in your monitoring environment. | no | none |