Unable to send message from Producer to Consumer

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kafka-console-consumer.bat --bootstrap-server localhost:2181 --topic baeldung kafka-console-producer.bat --broker-list localhost:9092 --topic baeldung

Message is not going from producer to consumer.

In the consumer you've mistakenly used zookeeper port 2181. It has to be localhost:9092

Solved: Unable to produce message in kafka ?, kafka-console-producer.sh --broker-list localhost:9092 --topic girishtp or . kafka​-console-consumer.sh --zookeeper localhost:2181 --topic girishtp FailedToSendMessageException: Failed to send messages after 3 tries. at  This can help identify whether your problem is on producer side or consumer side. Another good place to look when debugging is kafka server logs. My rough guess from your code is that you may be killing your producer before messages are actually delivered (send operates asynchronously).

Consumer Script:

kafka-console-consumer.bat --bootstrap-server localhost:2181 --topic baeldung

Producer Script :

kafka-console-producer.bat --broker-list localhost:9092 --topic baeldung

In above commands, broker addresses are different. Producer seems to have correct address localhost:9092 while consumer script has zookeeper address localhost:2181. Change it to localhost:9092 like this ::

kafka-console-consumer.bat --bootstrap-server localhost:9092--topic baeldung 

Help: messages not delivering from producer · Issue #563 · dpkp , But, I am not able to send messages from producer to consumer using python code. producer.py. from kafka import KafkaProducer producer =  The producer will not create a new item unless it first receives an emptymessage. The consumer waits for messages from the producer which contain the items. Once it consumes an item, it sends an emptymessage to the producer. Again, there is no real buffer, only a buffer size which dictates the number of items allowed to be produced.

Commands you need in order to run producer and consumer:


kafka-console-consumer.bat --bootstrap-server localhost:9092 --topic baeldung


kafka-console-producer.bat --broker-list localhost:9092 --topic baeldung

If you want to consume messages from the beginning, include --from-beginning in consumer, otherwise it will consume latest messages by default.

If you add more brokers to your cluster, in order to consume/produce from all brokers just add your brokers ports like: localhost:9092,localhost:9093,localhost:9094

Unable to send messages when consumer and producer are on , Hello, I can't seem to figure out how to send messages when the producer and the consumer are on different servers. The producer uses the  Sending lines of text will result in messages with null keys. In order to send messages with both keys and values you must set the --parse.key property to true and --key.separator property to a separator (i.e. comma, semicolon, colon etc.) on the command line when running the producer.

Middleware for Communications, Nontransactional queues are unable to process messages that have been included in a The roles played by the message producer, message consumer, and message broker Producer The producer sends a message or set of messages  __consumer_offsets girishtp . Step 4: Send some messages . By default, each line will be sent as a separate message. Run the producer and then type a few messages into the console to send to the server. bin/kafka-console-producer.sh --broker-list localhost:9092 --topic girishtp {type some random message here } Step 5: Start a consumer

Real-Time Embedded Systems: Open-Source Operating Systems Perspective, pdPASS) printf("* Producer %d unable to send\n", args->n); } } void pdPASS) printf("* Consumer #%d unable to receive\n", args->n); else printf("Consumer  ^C18/09/11 02:30:58 INFO producer.KafkaProducer: Closing the Kafka producer with timeoutMillis = 9223372036854775807 ms. In kafka logs at location /var/log/kafka , I see message like below

TimeoutException when using standard Kafka producer, standard Kafka producer ( kafka-console-producer.sh ) is unable to send messages and fails with the following timeout error: org.apache.kafka.common.​errors  There were about 10 images of each man- the same exact message appeared on each image. I deleted all the extras. I was unable to send a message to any of them - i could type it in and press send but it wouldn't go through. I have tried to send messages for several days- none went through.

  • Voting to close as typo. 2181 => 9092
  • If using --zookeeper localhost:2181 instead, then it might work, but not in latest releases where that support was removed, I believe. In earlier releases , it would additionally require adding --new-consumer option, which was added around 0.10 release
  • Yep, I assumed it's one of the newer releases.