The topic doesn’t have a schema so I can send any type of message I wish, in this example I’m sending JSON as a string. As in the previous recipe, you must have already downloaded and set up Kafka. Besides, how do I send a message to Kafka topic? The Apache Kafka package installation comes bundled with a number of helpful command line tools to communicate with Kafka in various ways. In Kafka, Avro is the standard message format. There are following steps used to launch a producer: Step1: Start the zookeeper as well as the kafka server. Sending data to Kafka Topics. Now, in the command line, change to the Kafka directory. This tool lets you produce messages from the command-line. We are running it into only one Kafka server. You have already started the Kafka nodes as mentioned in the previous recipes. It is responsible for putting data in our Kafka. Basically, a messaging system lets you send messages between processes, applications, and servers. Go to your Kafka installation directory: For me, it’s D:\kafka\kafka_2.12-2.2.0\bin\windows. Prerequisites. In this article, we are going to learn basic commands in Kafka. The producer publishes a message to one or more Kafka topics. The use case involves users alice, bob, and charlie where: alice creates and produces to topic test. This tool lets you produce messages from the command-line. kafka-console-producer command. Now, you are ready to send some messages to Kafka from your console. In this example, the producer application writes Kafka data to a topic in your Kafka cluster. The utility is called Kafka-console- producer.sh. Send simple string messages to a topic: kafka-console-producer --broker-list localhost:9092 --topic test here is a message here is another message ^D (each new line is a new message, type ctrl+D or ctrl+C to stop) Send messages with keys: In this section, you’ll learn how Kafka’s command line tools can be authenticated against the secured broker via a simple use case. I had some problem with sending avro messages using Kafka Schema Registry.. Open a command prompt and run the following command. Step2: Type the command: 'kafka-console-producer' on the command line. Use Kafka with the Command Line. We will use the utility that Kafka provides to send messages to a topic using the command line. You will need to create a topic as well. 4. Moreover, Kafka is a software where topics can be defined and further processed. Here, I will show you how to send avro messages from the client application and from Kafka Streams using Kafka Schema Registry. Recently, I have used Confluent 3.3.1. For example. I’m using the kafka-console-producer command to send a plain text message to the topic. Topic Name is “chat-message”. bob consumes from topic test in consumer group bob-group. Sending Messages to Kafka. Further, applications may connect to this system and transfer a message to the topic. If the topic does not already exist in your Kafka cluster, the producer application will use the Kafka Admin Client API to create the topic. Send simple string messages to a topic: kafka-console-producer --broker-list localhost:9092 --topic test here is a message here is another message ^D (each new line is a new message, type ctrl+D or ctrl+C to stop) Send messages with keys: key1:value1 key2:value2 key3:value3 kafka-console-producer.sh --broker-list localhost:9092 --topic topic-name --property "parse.key=true" --property "key.separator=:" After running this command you will enter in producer console and from there you can send key, value messages. $ bin/kafka-console-producer –broker-list localhost:9092 –topic … In this example we will be using the command line tools kafka-console-producer and kafka-console-consumer that come bundled with Apache Kafka. Users alice, bob, and servers you are ready to send some messages Kafka. And set up Kafka using the kafka-console-producer command to send avro messages from the client application and from Kafka using... 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