Kafka consumer assign vs subscribe

Nancy Wilson

May 14, 2025

7 min read

This is useful when implementing the same functionality for .id下的不同消费者不会消费同样的partition，也即某个partition在任何时刻都只能被具有相同group.Consumer id = consumer-1.9 版本提供了Java版本的Consumer SDK供用户使用，.

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How to assign partitions to your consumers?

However, after working a while with Kafka you will encounter various weird behaviors originating from rebalancing settings such as chosen assignor implementation.Balises :Apache KafkaAssign A Method To A ConsumerKafka Consumer Group Topic

关于kafka中consumer subscribe与asssign的理解-CSDN博客

1、可以通过增加partitions和consumer来提升吞吐量；.In this article, we learned three different methods of subscribing a Kafka consumer to multiple topics.文章浏览阅读7. Subscribe vs Assign.Understanding Kafka Consumers. If you don't have a plan to expand partitions, consider using assign () method. 也正是这个机制才能保证kafka的重要特性：在KafkaConsumer类中（官方API .

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Kafka消费者订阅指定主题(subscribe)或分区(assign)详解

8 or later), Confluent Cloud, and Confluent Platform.subscribe方法 的15个代码示例，这些例子默认根据受欢迎程度排序 .

Attaching KafaConsumer assigned to a specific partition

Consumers subscribe to one or more topics and process the feed of records as they are produced. How to assign partitions to your consumers? The use of assign() signifies the user's intention to manage the partition . In this tutorial, we’ll learn how to create a Kafka listener and consume messages from a topic using Kafka’s Consumer API.Kafka maintains a numerical offset for each record in a partition. 您也可以进一步了解该方法所在 类kafka. Consumer就是负责从Kafka集群中消费消息数据的应用程序，自 Kafka 0.Balises :Kafkaconsumer ApiConfluent Kafka ConsumerKafka Consumer Api一、前言： 使用Apache Kafka消费者组时，有一个为消费者分配对应分区partition的过程，我们可以使用“自动”subscribe和“手动”assign的方式。 KafkaConsumer.These APIs are also helpful to replay data from a specific offset. Kafka consumers read records from a Kafka cluster.subscribe使用的例子？那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。.assign(partitions); Similar to subscribe, the call to assign must pass the full list of partitions you want to read from. Subscribe makes use of the consumer group; Kafka coordinator sends assignment to a consumer and the partitions of the topics .ms and other properties that you specify during consumer creation. If the user calls the subscribe() API, the Consumer knows that it is being directed to use Kafka's consumer group-based partition assignment. When a consumer fails the load is automatically distributed to other members of the group.Balises :Apache KafkaKafka Consumer TopicKafkaconsumer Poll

How to Subscribe a Kafka Consumer to Multiple Topics

Subscribe makes use of the consumer group; Kafka coordinator sends assignment to a consumer and the partitions of the topics subscribed to, will be distributed to the . An Apache Kafka® consumer is a client application .KafkaConsumer 的用法示例。. To use these API, make the following changes: Remove the group. In this case, dynamic partition assignment and consumer group coordination will be disabled. >>> from kafka import TopicPartition.This Python client provides a high-level producer, consumer, and AdminClient that are compatible with Kafka brokers (version 0.First, the subscription() method is invoked on all consumers, which are responsible to create the Subscription that will be sent to the broker coordinator.It is also possible for the consumer to manually assign specific partitions (similar to the older simple consumer) using assign(Collection).与subscirbe方法不同，assign方法由用户直接手动consumer实例消费哪些具体分区，根据api上述描述，assign的consumer不会拥有kafka的group management机制，也就是当group内消费者数量变化的时候不会有reblance行为发生。.KafkaConsumer assign VS subscribe.

using assign instead of subscribe in kafka consumer side

在kafka中，正常情况下，同一个group.Balises :Apache KafkaConfluent Kafka ConsumerKafka Consumer ApiIf you create thousands of consumers to consume data from only one partition, I suspect that you will lose some level of parallelism. You can find code samples for the consumer in different languages in these guides.subscribe()：为consumer自动分配partition，有内部算法保证topic-partition以最优的方式均匀分配给同group下的不同 .asList(foo, bar)); After you have . >>> consumer = KafkaConsumer(bootstrap_servers='localhost:1234')3k次，点赞4次，收藏19次。一、前言：使用Apache Kafka消费者组时，有一个为消费者分配对应分区partition的过程，我们可以使用“自动”subscribe和“手动”assign的方式。KafkaConsumer.KafkaConsumer assign VS subscribe，背景在kafka中，正常情况下，同一个group.

Critiques : 3

Kafka Consumer

Let's see how different assignors work and what are . How to use: KafkaConsumer consumer = new KafkaConsumer(properties); Kafka will deliver each message in the subscribed topics to one process in each consumer group.subscribe()：为consumer自动分配partition，有内部算法保证topic-partition以最优的方式均匀分配给同group下的不同consumer。

Apache Kafka消费者组subscribe和assign的正确使用

7k次，点赞4次，收藏12次。一、前言：使用Apache Kafka消费者组时，有一个为消费者分配对应分区partition的过程，我们可以使用“自动”subscribe和“手动”assign的方式。KafkaConsumer.Kafka consumers will subscribe to specific topics or topic partitions and retrieve messages from those topics in real-time. Because all the messages that come with the specific key will go to the same partition.id的consumer中的一个消费。. To learn more about consumers in Kafka, see this free Apache Kafka 101 course. For example, a consumer which is at position 5 has consumed records with offsets 0 through 4 and will next receive the record with offset 5. Difference between subscribe() and assign() is that when using. Using Kafka is usually fairly simple.

Using the consumer API is similar in principle to the producer.

Consumer rebalance

You just create .To get started with the consumer, add the kafka-clients dependency to your project. subscribe() uses group-id in the consumer properties and helps in dynamic partition . 在下文中一共展示了 KafkaConsumer. Reading data from Kafka is a bit different than reading data from other messaging systems, and there are few unique concepts and ideas .Consuming Messages. These records are organized and stored in topics that are distributed over a number of partitions.

Is it possible to consume kafka messages using key and partition?

Stay up-to-date with the latest release updates by checking out the changelog available in the same repository. After that, we’ll test our .Each consumer in a group can dynamically set the list of topics it wants to subscribe to through one of the subscribe APIs. 2、保证同一 . Consumer groups allow a group of machines or processes to coordinate access to a list of topics, distributing the load among the consumers. This is achieved by balancing the partitions between all members in the consumer group so that each partition is assigned to . using assign) with dynamic partition assignment through topic subscription (i.Kafka Consumers.id的consumer中的一个消费。也正是这个.Apache Kafka消费者组subscribe和assign的正确使用 .Kafka Consumer¶ An Apache Kafka® Consumer is a client application that subscribes to (reads and processes) events.

Kafka的assign和subscribe订阅模式和手动提交偏移量

assign的方法不能和subscribe方法同时使用。.

You use a class called KafkaConsumer to connect to the cluster (passing a configuration map to . There is some example code here: >>> # manually assign the partition list for the consumer.subscribe(Arrays.id from the consumer properties (we don't use consumer groups anymore) . Applications that need to read data from Kafka use a KafkaConsumer to subscribe to Kafka topics and receive messages from these topics.

Using assign instead of subscribe in kafka consumer

Consumer group id = consumer-group-1. using subscribe). Posted by Łukasz Chrząszcz on Friday, January 7, 2022. Use python-kafka to create a consumer, group_id = 'my_group', use the assign method to subscribe to a specific topic = 'assign_topic', .Balises :Kafkaconsumer ApiKafka Consumer ApiKafka Consumer Topic The maven snippet is provided below: . Click here to learn more about how to optimize .

apache kafka

Based on the user calling either assign() or subscribe(), a Consumer determines how topic partitions are to be assigned.也就是说，在执行seek()方法之前需要先执行一次poll()方法， 等到分配到分区之后才可以重置消费位置（如果用subscribe订阅的话就需要poll一次，如果用assign()手动订阅分区就不需要poll一次）。seek()方法的使用示例如代码清单3 - 5 所示（只列出关键代码)。

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Creating a Kafka Listener Using the Consumer API

Balises :Apache KafkaKafkaconsumer ApiConsumer Subscribe Topic

Kafka Consumer Design: Consumers, Consumer Groups, and

You can use the assign() method to manually assign one or more partitions to a consumer.Integrating with Kafka usually starts with subscribing your consumers to Kafka with default configuration and it just works.

A Subscription contains.

How to Write a Kafka Consumer in Python

This offset acts as a unique identifier of a record within that partition, and also denotes the position of the consumer in the partition.

Application 2 : Consumer id = consumer-2.This topic provides Apache Kafka® consumer configuration parameters. For a step-by-step guide on building a Python client .