can't connect to broker

i just copied the code from readme.md

and change the broker address to localhost:9092

but why the server address like this ?

broker":“f43be2dafb3b:9092”,

btw i use this one to start kafka https://hub.docker.com/r/bitnami/kafka

{"level":"ERROR","timestamp":"2019-08-23T07:15:04.982Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:04.984Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":0,"retryTime":314}
{"level":"ERROR","timestamp":"2019-08-23T07:15:05.304Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:05.304Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":1,"retryTime":604}
{"level":"ERROR","timestamp":"2019-08-23T07:15:05.911Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:05.911Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":2,"retryTime":1138}
{"level":"ERROR","timestamp":"2019-08-23T07:15:07.055Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:07.055Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":3,"retryTime":2218}
{"level":"ERROR","timestamp":"2019-08-23T07:15:09.278Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:09.278Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":4,"retryTime":4694}
{"level":"ERROR","timestamp":"2019-08-23T07:15:13.975Z","logger":"kafkajs","message":"[Connection] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","broker":"f43be2dafb3b:9092","clientId":"my-app","stack":"Error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092\n    at GetAddrInfoReqWrap.onlookup [as oncomplete] (dns.js:57:26)"}
{"level":"ERROR","timestamp":"2019-08-23T07:15:13.975Z","logger":"kafkajs","message":"[BrokerPool] Failed to connect to broker, reconnecting","retryCount":5,"retryTime":10562}
{"level":"ERROR","timestamp":"2019-08-23T07:15:13.977Z","logger":"kafkajs","message":"[Producer] Connection error: getaddrinfo ENOTFOUND f43be2dafb3b f43be2dafb3b:9092","retryCount":0,"retryTime":340}

version: '2'

services:
  zookeeper:
    image: 'bitnami/zookeeper:3'
    ports:
      - '2181:2181'
    volumes:
      - 'zookeeper_data:/bitnami'
    environment:
      - ALLOW_ANONYMOUS_LOGIN=yes
  kafka:
    image: 'bitnami/kafka:2'
    ports:
      - '9092:9092'
    volumes:
      - 'kafka_data:/bitnami'
    environment:
      - KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper:2181
      - ALLOW_PLAINTEXT_LISTENER=yes
    depends_on:
      - zookeeper

volumes:
  zookeeper_data:
    driver: local
  kafka_data:
    driver: local

const { Kafka } = require('kafkajs')

const kafka = new Kafka({
  clientId: 'my-app',
  brokers: 'localhost:9092',
})

const producer = kafka.producer()
const consumer = kafka.consumer({ groupId: 'test-group' })

const run = async () => {
  // Producing
  await producer.connect()
  await producer.send({
    topic: 'test-topic',
    messages: [
      { value: 'Hello KafkaJS user!' },
    ],
  })

  // Consuming
  await consumer.connect()
  await consumer.subscribe({ topic: 'test-topic', fromBeginning: true })

  await consumer.run({
    eachMessage: async ({ topic, partition, message }) => {
      console.log({
        partition,
        offset: message.offset,
        value: message.value.toString(),
      })
    },
  })
}

run().catch(console.error)

[tgbv]

If it helps anyone, I received the same error and I managed to solve it by providing the hostname to kafka service in docker-compose.yml:

kafka:
  image: 'bitnami/kafka:2'
  hostname: localhost
  ports:
    - '9092:9092'
  volumes:
    - 'kafka_data:/bitnami'
  environment:
    - KAFKA_CFG_ZOOKEEPER_CONNECT=zookeeper:2181
    - ALLOW_PLAINTEXT_LISTENER=yes
  depends_on:
    - zookeeper

[tulios]

Hi @crapthings, your setup is advertising the docker hostnames. Kafka has a configuration for that, so it can correctly pick up the host IP. Try setting the KAFKA_ADVERTISED_HOST_NAME to the host IP.