Kafka offset earliest. auto-offset-reset property in your Spring Boot application. properties to earliest, will always start the consumer reading data after midnight (12:00:00 AM ET) Jan 30, 2024 · Working Apache Kafka cluster Kafka command-line tools Basic understanding of Kafka topics and consumer groups. We updated our Kafka offset reset policy to earliest in several applications. Jan 30, 2024 · Here, ‘auto. reset property in kafka-config. The property auto. In the following example where a topic partition has two messages, 'foo' and 'bar', these messages would be consumed: Of course a topic partition could contain many millions of messages, so ensure Feb 15, 2018 · I have a weird issue with trying to read data from Kafka using Spark structured streaming. i. Subscribing to a Topic with Offset Control 6 days ago · Spring Kafka: Latest vs Earliest Configuration Apache Kafka is a distributed streaming platform that is widely used for building real - time data pipelines and streaming applications. Feb 4, 2025 · Apache Kafka provides a robust and scalable messaging system that allows consumers to read messages from topics at specific offsets. For instance, if an application that processes real-time transactions fails and needs to recover lost data, resetting the Feb 10, 2020 · Earliest — when the consumer application is initialized the first time or binds to a topic and wants to consume the historical messages present in a topic, the consumer should configure auto Aug 14, 2017 · Though the accepted answer perfectly answers OP question, there are more parameters available to reset offsets. Within a partition, Kafka identifies each message through the message’s offset. If you want the consumer to start from the latest offset, you can set this value to ‘latest’. 6 days ago · Apache Kafka is a distributed streaming platform that has become a cornerstone in modern data - driven architectures. sh --bootstrap-server <kafka_broker_host:9091> --group <group_name> --reset-offsets --to-earliest --all-topics --execute To reset offset of specific Oct 10, 2025 · 1. Spring Kafka is a framework that provides integration between Spring Boot and Kafka, making it easier for developers to work with Kafka in a Spring - based application. Apr 4, 2024 · Apache Kafka Guide #36 Consumer Offset Reset Behavior H i, this is Paul, and welcome to the #37 part of my Apache Kafka guide. It offers two offset types: earliest and latest. This situation can occur in a few scenarios: Feb 14, 2023 · My assumption when startingoffsets is set earliest it reads data from beginning and when latest it reads data from kafka after the start time of spark streaming job or that of query execution time . It allows for the efficient handling of high - volume, real - time data streams. offset. To read from the beginning you should call consumer. properties to latest, will start the consumer from where it last stopped consuming or failed (not with latest message). This is most typically of interest when a Apr 25, 2020 · auto. yml) file dictates what happens when a Kafka consumer starts and no valid offset is found for its consumer group and topic-partition combination. In this case, consumers have a choice to either If this flag is false, Kafka will not know which was the last offset read so when you restart the process, it will start reading the 'earliest' or the 'latest' offset depending on the value of your next flag (auto. reset is a Kafka Consumer configuration, which can be set to either earliest or latest (or None), that defines where a Consumer should begin reading from in the Kafka Topic when it doesn’t have any other valid offsets to start from. If resetOffsets is false, normal Kafka consumer auto. In other words, consumers will process messages from the very beginning of the log. The way in which the Kafka documentation describes these values is a bit vague and perhaps even confusing, so let’s explain them more clearly. My read configs: May 27, 2025 · The spring. Under the hood, Kafka’s architecture divides messages in a topic into partitions to allow parallel processing. consumer. AUTO_OFFSET_RESET_CONFIG, "earliest"); Figure 1: auto. Sometimes, you may need to reset a consumer group's offset—either to replay messages, skip messages, or troubleshoot consumption issues. reset determines how Kafka handles these situations: earliest: If no offset is found, the consumer starts reading from the beginning of the partition (offset 0). My consumers crashed – should I reset to earliest or latest? It depends! 6 days ago · Apache Kafka is a distributed streaming platform that has become a cornerstone in modern data - driven architectures. For example, if Kafka has a retention of 7 days, and your consumer is down for more than 7 days, the offsets are "invalid" as they will be deleted. So adding this answer to extend accepted answer. This article explains the difference between the two and when to use each one. Setting "auto. reset’ is set to ‘earliest’, which tells the consumer to start from the earliest offset available if an offset is not found. In the event that an ingestion lag is observed again (due to extended Maintenance Windows or spikes in data traffic), we reduce the blast radius associated with data loss by attempting to load the oldest available record in Kafka. To reset offset of all topics to earliest in the consumer group kafka-consumer-groups. e. Understanding Offsets in Kafka Before diving into offset resets, it’s important to understand that in Kafka, offsets are a sequential ID number given to each record within a partition. Setting the auto. One of the important configurations when consuming data from Kafka is the `earliest` property. My use case is to be able to read from a topic from the largest/latest offset available. reset property is used when a consumer starts but there is no committed offset for the assigned partition. reset is used only when there is no offset for the given consumer stored in Kafka. offset. Jan 31, 2025 · Setting the auto. This property is used to define the starting point of message consumption for a Kafka consumer. seekToBeginning or use unique group. One of the crucial configuration options in Kafka Consumer Offets Kafka consumers have a configuration for how to behave when they don’t have a previously committed offset. Sep 4, 2015 · The latest offset will still remain the same as in previous example but the earliest one won't be able to be 0 because Kafka will already remove these messages and thus the earliest available offset will be 5. reset: earliest will result in all events from the beginning of the topic partitions it is assigned to being consumed. reset semantics apply. put(ConsumerConfig. By default, bindings with an explicit group use earliest, and anonymous bindings (with no group) use latest. When a Oct 7, 2024 · The property auto. Jan 18, 2018 · What is the difference between kafka earliest and latest offset values Asked 7 years, 9 months ago Modified 1 year, 6 months ago Viewed 149k times Kafka earliest vs latest: Kafka is a distributed streaming platform. This can happen if the consumer application has a bug and it is down. Offset is a continuously increasing identifier that represents the order of a message from the beginning of the May 22, 2024 · To put it simply, auto. The consumer reads records in the order they Apr 9, 2022 · The auto offset reset consumer configuration defines how a consumer should behave when consuming from a topic partition when there is no initial offset. reset” property to “earliest”: consumerProperties. Sep 23, 2019 · What is the difference between Kafka earliest and latest offset values? The earliest and latest values for the auto. properties (or application. When a May 11, 2024 · Since we want to read from the beginning of the Kafka topic, we set the value of the “auto. id property. properties to earliest, will always start the consumer reading data after midnight (12:00:00 AM ET) Oct 9, 2024 · Learn about how Kafka consumer offset works and how it identifies the position of an event record in a partition. When you commit the record Kafka stores the offset of the record in a special topic and in the next run, your consumer will read the topic from the last committed offset. Nov 12, 2023 · Here are some common questions on Kafka offset resets: What causes offsets to get lost or missed? Some typical reasons are consumer crashes, operational errors deleting topics/offsets, bugs in connectors, fill disk errors, and neglecting to commit offsets. reset" to "earliest" instructs consumers to begin reading from the earliest available offset in each topic partition. Today we will discuss Consumer Offset Reset Behavior. reset关乎kafka数据的读取，是一个非常重要的设置。常用的二个值是latest和earliest，默认是latest。 一，latest和earliest区别 1，earliest 当各分区下有已提交的offset时，从提交的offset开始消费；无提交的offset时 Kafka offset Apache Kafka® is a streaming data platform and a distributed event store. Finally, This Cloudera article explains in details how to manage in a proper way the offsets. If there is no committed offset for a partition for the binding’s consumer group, the position is earliest or latest. kafka. reset). reset: earliest Configuring a new consumer to auto. . bqmb czsym2yp 8mrnsab pe quvt 2c j7 boe0k 6hneah djn