How do I get the latest message from Kafka topic?

Kafka provides the utility kafka-console-consumer.sh which is located at ~/kafka-training/kafka/bin/kafka-console-producer.sh to receive messages from a topic on the command line.
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How do I get the latest message from Kafka topic?If you want to consume only the latest message from kafka topic, Please set “Auto Offset Reset” to “LATEST” and keep other values as default. If you want to consume all the message published from kafka topic Please set “Auto Offset Reset” to “EARLIEST” and keep other values as default.

How do I get Kafka consumer offset?

How to find the current consumer offset? Use the kafka-consumer-groups along with the consumer group id followed by a describe. You will see 2 entries related to offsets – CURRENT-OFFSET and LOG-END-OFFSET for the partitions in the topic for that consumer group.

Where Kafka offset is stored?

Offsets in Kafka are stored as messages in a separate topic named '__consumer_offsets' . Each consumer commits a message into the topic at periodic intervals.

Which command is used in Kafka to retrieve messages from a topic?

Kafka provides the utility kafka-console-consumer.sh which is located at ~/kafka-training/kafka/bin/kafka-console-producer.sh to receive messages from a topic on the command line.

Related Questions

How do you read a Kafka topic from the beginning?

If you want to process a topic from its beginning, you can simple start a new consumer group (i.e., choose an unused group.id ) and set auto. offset. reset = earliest . Because there are no committed offsets for a new group, auto offset reset will trigger and the topic will be consumed from its beginning.

Does Kafka maintain ordering?

The challenge of receiving data in the order you prefer it in Kafka has a relatively simple solution: a partition maintains a strict order, and will always send data to consumers in the order it was added to the partition. However, Kafka does not maintain a total order of records across topics with multiple partitions.

Which is the correct order of steps to create a simple messaging system in Kafka?

1.3 Quick Start

  1. Step 1: Download the code. Download the 0.8 release.
  2. Step 2: Start the server. Kafka uses zookeeper so you need to first start a zookeeper server if you don't already have one.
  3. Step 3: Create a topic.
  4. Step 4: Send some messages.
  5. Step 5: Start a consumer.
  6. Step 6: Setting up a multi-broker cluster.

How can I see the messages in Kafka topic?

You can use the Kafka-console-consumer to view your messages.
Procedure

  1. Log in to the IBM Event Streams console.
  2. Select Topic > ibm-bai-ingress > Messages.
  3. Select a date.
  4. The messages are listed according to time stamps.

How do I read a message from Kafka topic?

On the Basic tab, set the following properties:

  1. In the Topic name property, specify the name of the Kafka topic containing the message that you want to read.
  2. In the Partition number property, specify the number of the Kafka partition for the topic that you want to use (valid values are between 0 and 255 ).

How do I get latest offset in Kafka?

If you wish to use Kafka shell scripts present in kafka/bin, then you can get latest and smallest offsets by using kafka-run-class.sh. Hope this helps!

How do I find a specific message in Kafka?

A message within a Kafka is uniquely defined by its topic name, topic partition and offset. So unless you are aware of these three values, you can not look up a specific message. The alternative would be to consume the entire topic from beginning and implements a filter on your requirement.

What is consumer offset in Kafka?

Defining Kafka Consumer Offset
The consumer offset is a way of tracking the sequential order in which messages are received by Kafka topics. Keeping track of the offset, or position, is important for nearly all Kafka use cases and can be an absolute necessity in certain instances, such as financial services.