Kafka with NestJS - send hangs - apache-kafka

Question

The code is pretty similar to the official tutorial: https://docs.nestjs.com/microservices/kafka
kafka.module.ts:
import { Module } from '#nestjs/common'
import { ClientsModule, Transport } from '#nestjs/microservices'
import { KafkaClientController } from './kafka.controller'
#Module({
imports: [
ClientsModule.register([
{
name: 'KAFKA_SERVICE',
transport: Transport.KAFKA,
options: {
client: {
clientId: 'say',
brokers: ['localhost:29092'], // docker container port
},
consumer: {
groupId: 'say-consumer',
},
},
},
]),
],
controllers: [KafkaClientController],
})
export class KafkaModule {}
kafka.controller.ts:
import { Controller, Get, Inject, OnModuleDestroy, OnModuleInit } from '#nestjs/common'
import { ClientKafka } from '#nestjs/microservices'
#Controller('kafka')
export class KafkaClientController implements OnModuleInit, OnModuleDestroy {
constructor(#Inject('KAFKA_SERVICE') private readonly kafka: ClientKafka) {}
async onModuleInit() {
this.kafka.subscribeToResponseOf('say.hello')
await this.kafka.connect()
}
onModuleDestroy() {
this.kafka.close()
}
#Get()
async sayHello() {
console.log('in sayHello')
const x = await this.kafka.send('say.hello', 'hi this is the data').toPromise() // hangs here
console.log(x)
}
}
The method sayHello hangs, even if I replace the send line with:
return this.kafka.send('say.hello', 'hi this is the data')
I've seen this question for Scala: Kafka producer hangs on send
But I couldn't find an ack option: KafkaOptions KafkaConfig ProducerConfig ConsumerConfig