# ConsumerGroupJoinEvent

**Kind:** Type

**Source:** [`packages/microservices/external/kafka.interface.ts`](https://github.com/nestjs/nest/blob/master/packages/microservices/external/kafka.interface.ts#L942)

**Part of:** [Microservices](subsystem-packages-microservices)

## Definition

```ts
InstrumentationEvent<{ duration: number; groupId: string; isLeader: boolean; leaderId: string; groupProtocol: string; memberId: string; memberAssignment: IMemberAssignment; }>
```