Kafka can now be used without ZooKeeper as of version 2.8. 
The release of Kafka 2.8.0 in April 2021 gave us all the opportunity to try it out without ZooKeeper. 
However, this version is not yet ready for production and lacks some key features.
In the previous versions, bypassing Zookeeper and connecting directly to the Kafka broker was not possible. 
This is because when the Zookeeper is down, it is unable to fulfill client requests.

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Contributed on Dec 17 2022

Deepika Sahu

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Can Kafka be used without ZooKeeper?

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Post Version 2.8 we Can use Kafka without Zookeeper

@Component
@KafkaListener(id = "multiGroup", topics = "multitype")
public class MultiTypeKafkaListener {

    @KafkaHandler
    public void handleGreeting(Greeting greeting) {
        System.out.println("Greeting received: " + greeting);
    }

    @KafkaHandler
    public void handleF(Farewell farewell) {
        System.out.println("Farewell received: " + farewell);
    }

    @KafkaHandler(isDefault = true)
    public void unknown(Object object) {
        System.out.println("Unkown type received: " + object);
    }
}

https://www.confluent.io/blog/kafka-without-zookeeper-a-sneak-peek/

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Contributed on Feb 06 2023

Pragya Keshap

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Is it possible to use Kafka without ZooKeeper?

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