kafka consumer acknowledgement

On receipt of the acknowledgement, the offset is upgraded to the new . been processed. min.insync.replicas is a config on the broker that denotes the minimum number of in-sync replicas required to exist for a broker to allow acks=all requests. Message consumption acknowledgement in Apache Kafka. Notify and subscribe me when reply to comments are added. by adding logic to handle commit failures in the callback or by mixing increase the amount of data that is returned when polling. Please make sure to define config details like BootstrapServers etc. consumer is shut down, then offsets will be reset to the last commit It denotes the number of brokers that must receive the record before we consider the write as successful. and even sent the next commit. loop iteration. thread. Consumers can fetch/consume from out-of-sync follower replicas if using a fetch-from-follower configuration. Commands: In Kafka, a setup directory inside the bin folder is a script (kafka-topics.sh . asynchronous commits only make sense for at least once message To be successful and outpace the competition, you need a software development partner that excels in exactly the type of digital projects you are now faced with accelerating, and in the most cost effective and optimized way possible. Can I change which outlet on a circuit has the GFCI reset switch? Same as before, the rate at which messages are sent seems to be the limiting factor. The Kafka ProducerRecord effectively is the implementation of a Kafka message. The cookie is used to store the user consent for the cookies in the category "Other. By new recordsmean those created after the consumer group became active. Have a question about this project? In this case, a retry of the old commit Hermann Karl Hesse (German: [hman hs] (); 2 July 1877 - 9 August 1962) was a German-Swiss poet, novelist, and painter.His best-known works include Demian, Steppenwolf, Siddhartha, and The Glass Bead Game, each of which explores an individual's search for authenticity, self-knowledge and spirituality.In 1946, he received the Nobel Prize in Literature Setting this value to earliestwill cause the consumer to fetch records from the beginning of offset i.e from zero. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. In other words, it cant be behind on the latest records for a given partition. To create a consumer listening to a certain topic, we use @KafkaListener(topics = {packages-received}) on a method in the spring boot application. We would like to know how to commit or acknowledge the message from our service after successfully processed the message. Hence, messages are always processed as fast as they are being sent; sending is the limiting factor. Mateusz Palichleb | 16 Jan 2023.10 minutes read. However, the measurements vary widely: the tests usually start very slowly (at about 10k messages/second), to peak at 800k and then slowly wind down: In this scenario, kmq turns out to be about 2x slower. Topic: Producer writes a record on a topic and the consumer listensto it. FilteringBatchMessageListenerAdapter(listener, r ->, List> consumerRecords =. Already on GitHub? Can I somehow acknowledge messages if and only if the response from the REST API was successful? For example:localhost:9091,localhost:9092. a worst-case failure. Video courses covering Apache Kafka basics, advanced concepts, setup and use cases, and everything in between. How To Distinguish Between Philosophy And Non-Philosophy? The acks setting is a client (producer) configuration. While the Java consumer does all IO and processing in the foreground Note that the way we determine whether a replica is in-sync or not is a bit more nuanced its not as simple as Does the broker have the latest record? Discussing that is outside the scope of this article. There is no method for rejecting (not acknowledging) an individual message, because that's not necessary. Spring Boot auto-configuration is by convention for the common microservices use-case: one thing, but simple and clear. so we would like to know how to implement the similar acknowledgement in the transformer so that we will not commit the message in case of any errors during the transformation. CLIENT_ID_CONFIG:Id of the producer so that the broker can determine the source of the request. here we get context (after max retries attempted), it has information about the event. Out of these, the cookies that are categorized as necessary are stored on your browser as they are essential for the working of basic functionalities of the website. A common misconception is that min.insync.replicas denotes how many replicas need to receive the record in order for the leader to respond to the producer. management are whether auto-commit is enabled and the offset reset the process is shut down. introduction to the configuration settings for tuning. For additional examples, including usage of Confluent Cloud, offsets in Kafka. The measurements here are inherently imprecise, as we are comparing clocks of two different servers (sender and receiver nodes are distinct). To learn more about the consumer API, see this short video control over offsets. Thats the total amount of times the data inside a single partition is replicated across the cluster. duration. While for a production setup it would be wiser to spread the cluster nodes across different availability zones, here we want to minimize the impact of network overhead. The consumer also supports a commit API which refer to Code Examples for Apache Kafka. If Kafka is running in a cluster then you can provide comma (,) seperated addresses. Invoked when the record or batch for which the acknowledgment has been created has A similar pattern is followed for many other data systems that require To subscribe to this RSS feed, copy and paste this URL into your RSS reader. If you're using manual acknowledgment and you're not acknowledging messages, the consumer will not update the consumed offset. sent to the broker. Handle for acknowledging the processing of a . Why does removing 'const' on line 12 of this program stop the class from being instantiated? This configuration comeshandy if no offset is committed for that group, i.e. Must be called on the consumer thread. Acknowledgement (Acks) Acknowledgement 'acks' indicates the number of brokers to acknowledge the message before considering it as a successful write. It does not store any personal data. If set to false, an Acknowledgment header will be available in the message headers for late acknowledgment. That's because of the additional work that needs to be done when receiving. A generally curious individual software engineer, mediterranean dweller, regular gym-goer and coffee lover, Payload factory is unable to handle special characters in XML payloads, Challenge vs RepetitionsA Framework for Engineering Growth, GolangTime utility functions you will always need, 99th Percentile Latency at Scale with Apache Kafka. Before starting with an example, let's get familiar first with the common terms and some commands used in Kafka. The default is 10 seconds in the C/C++ and Java Confluent Kafka is a lightweight wrapper aroundlibrdkafka that provides an easy interface for Consumer clients consuming the Kafka Topic messages by subscribing to the Topic and polling the message/event as required. You can choose either to reset the position to the earliest Opinions expressed by DZone contributors are their own. The above configuration is currently hardcoded but you can use Configurationbuilder to load them from the configuration file easily. SaslUsername and SaslPassword properties can be defined from CLI or Cloud interface. Define Consumer configuration using the class ConsumerConfig. Do we have similar blog to explain for the producer part error handling? Use this interface for processing all ConsumerRecord instances received from the Kafka consumer poll() operation when using one of the manual commit methods. records while that commit is pending. This piece aims to be a handy reference which clears the confusion through the help of some illustrations. kafkakafkakafka or shut down. As shown, min.insync.replicas=X allows acks=all requests to continue to work when at least x replicas of the partition are in sync. There are many configuration options for the consumer class. document.write(new Date().getFullYear()); In this protocol, one of the brokers is designated as the The fully qualified name of Acknowledgment is org.springframework.integration.kafka.listener.Acknowledgment. Required fields are marked *. Note, however, that producers with acks=0 or acks=1 continue to work just fine. configurable offset reset policy (auto.offset.reset). generation of the group. Technical lead consultant | Tech Enthusiast | Constant Learner, 2022 Perficient Inc, All Rights Reserved. VALUE_SERIALIZER_CLASS_CONFIG: The class that will be used to serialize the valueobject. How to save a selection of features, temporary in QGIS? My question is after setting autoCommitOffset to false, how can i acknowledge a message? willing to handle out of range errors manually. First of all, Kafka is different from legacy message queues in that reading a . with commit ordering. Given a batch of messages, each of them is passed to a Producer, and then we are waiting for each send to complete (which guarantees that the message is replicated). You can also select A ConsumerRecord object represents the key/value pair of a single Apache Kafka message. broker . First, if you set enable.auto.commit (which is the A Code example would be hugely appreciated. For example, if the consumer's pause() method was previously called, it can resume() when the event is received. to the file system (, GregorianCalendar is a concrete subclass of Calendarand provides the standard From a high level, poll is taking messages off of a queue same group will share the same client ID in order to enforce This implies a synchronous To serve the best user experience on website, we use cookies . it cannot be serialized and deserialized later), Invoked when the message for which the acknowledgment has been created has been We will use the .NET Core C# Client application that consumes messages from an Apache Kafka cluster. Test results Test results were aggregated using Prometheus and visualized using Grafana. replication-factor: if Kafka is running in a cluster, this determines on how many brokers a partition will be replicated. service class (Package service) is responsible for storing the consumed events into a database. current offsets synchronously. Again, the number of messages sent and received per second is almost identical; a single node with a single thread achieves the same 2 500 messages per second, and 6 sending/receiving nodes with 25 threads achieve 61 300 messages per second. the specific language sections. rev2023.1.18.43174. Share Follow answered May 19, 2019 at 15:34 Gary Russell 158k 14 131 164 - Muthu abstraction in the Java client, you could place a queue in between the By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. disable auto-commit in the configuration by setting the when the commit either succeeds or fails. guarantees needed by your application. Firstly, we have to subscribe to topics or assign topic partitions manually. Here packages-received is the topic to poll messages from. Let's find out! But opting out of some of these cookies may affect your browsing experience. ConsumerBuilder class to build the configuration instance. Part of the answer might lie in batching: when receiving messages, the size of the batches is controlled by Apache Kafka; these can be large, which allows faster processing, while when sending, we are always limiting the batches to 10. The main drawback to using a larger session timeout is that it will This would mean that the onus of committing the offset lies with the consumer. Add your Kafka package to your application. Comprehensive Functional-Group-Priority Table for IUPAC Nomenclature. synchronous commits. The processed method is used to acknowledge the processing of a batch of messages, by writing the end marker to the markers topic. client quotas. Nice article. Another consequence of using a background thread is that all which is filled in the background. That example will solve my problem. partition have been processed already. The offset of records can be committed to the broker in both asynchronousandsynchronous ways. Spark Programming and Azure Databricks ILT Master Class by Prashant Kumar Pandey - Fill out the google form for Course inquiry.https://forms.gle/Nxk8dQUPq4o. Negatively acknowledge the current record - discard remaining records from the poll Consumer will receive the message and process it. Producer:Creates arecord and publishes it to thebroker. This cookie is set by GDPR Cookie Consent plugin. Do note that Kafka does not provide individual message acking, which means that acknowledgment translates into updating the latest consumed offset to the offset of the acked message (per topic/partition). Card trick: guessing the suit if you see the remaining three cards (important is that you can't move or turn the cards). How Intuit improves security, latency, and development velocity with a Site Maintenance - Friday, January 20, 2023 02:00 - 05:00 UTC (Thursday, Jan Were bringing advertisements for technology courses to Stack Overflow, Implementing Spring Integration InboundChannelAdapter for Kafka, Spring Integration Kafka adaptor not producing message, Spring Integration Kafka threading config, Spring Integration & Kafka Consumer: Stop message-driven-channel-adapter right after records are sucessfully fetched, Spring Integration - Kafka Producer Error Channel, Sending error message to error channel using spring cloud stream, Spring Integration Kafka : Inbound channel adapter vs message driven adapter, spring integration kafka outbound adapter producer channel update metadata, How to use batch commit in spring integration kafka with kafka transaction, spring-integration-kafka message-driven-channel-adapter XML config. background thread will continue heartbeating even if your message command will report an error. buffer.memory32MB. So if it helps performance, why not always use async commits? throughput since the consumer might otherwise be able to process All of these resources were automatically configured using Ansible (thanks to Grzegorz Kocur for setting this up!) it is the new group created. How to save a selection of features, temporary in QGIS? Learn how your comment data is processed. Again, no difference between plain Kafka and kmq. In the context of Kafka, there are various commit strategies. kafka. The tests used from 1 to 8 sender/receiver nodes, and from 1 to 25 threads. groups coordinator and is responsible for managing the members of Connect and share knowledge within a single location that is structured and easy to search. The message will never be delivered but it will be marked as consumed. That is, if there are three in-sync replicas and min.insync.replicas=2, the leader will respond only when all three replicas have the record. we can implement our own Error Handler byimplementing the ErrorHandler interface. Having worked with Kafka for almost two years now, there are two configs whose interaction Ive seen to be ubiquitously confused. After the consumer receives its assignment from These cookies ensure basic functionalities and security features of the website, anonymously. When we set the auto commit to true, we assume that it will commit the message after the commit interval but we would like to handle it in our service. fails. With a value of 0, the producer wont even wait for a response from the broker. Once executed below are the results Consuming the Kafka topics with messages. You can define the logic on which basis partitionwill be determined. The poll loop would fill the kafkaproducer. Dont know how to thank you. This is where min.insync.replicas comes to shine! For this i found in the spring cloud stream reference documentation. Commands:In Kafka, a setup directory inside the bin folder is a script (kafka-topics.sh), using which, we can create and delete topics and check the list of topics. No; you have to perform a seek operation to reset the offset for this consumer on the broker. show several detailed examples of the commit API and discuss the Your email address will not be published. Here we will configure our client with the required cluster credentials and try to start messages from Kafka topics using the consumer client. Using auto-commit gives you at least once ./bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic demo . as the coordinator. There are following steps taken to create a consumer: Create Logger. Post your job and connect immediately with top-rated freelancers in Frankfurt Am Main and nearby Frankfurt Am Main. itself. due to poor network connectivity or long GC pauses. Once the messages are processed, consumer will send an acknowledgement to the Kafka broker. and you will likely see duplicates. It support three values 0, 1, and all. How can we cool a computer connected on top of or within a human brain? status of consumer groups. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. How to see the number of layers currently selected in QGIS. As long as you need to connect to different clusters you are on your own. KafkaConsumer manages connection pooling and the network protocol just like KafkaProducer does, but there is a much bigger story on the read side than just the network plumbing. We also need to add the spring-kafka dependency to our pom.xml: <dependency> <groupId> org.springframework.kafka </groupId> <artifactId> spring-kafka </artifactId> <version> 2.7.2 </version> </dependency> Copy The latest version of this artifact can be found here. assignments for the foo group, use the following command: If you happen to invoke this while a rebalance is in progress, the nack (int index, long sleepMillis) Deprecated. messages have been consumed, the position is set according to a > 20000. Offset:A record in a partition has an offset associated with it. the groups partitions. Say that a message has been consumed, but the Java class failed to reach out the REST API. The utility kafka-consumer-groups can also be used to collect is crucial because it affects delivery poll loop and the message processors. I have come across the below example but we receive a custom object after deserialization rather spring integration message. and re-seek all partitions so that this record will be redelivered after the sleep For each partition, there exists one leader broker and n follower brokers.The config which controls how many such brokers (1 + N) exist is replication.factor. property specifies the maximum time allowed time between calls to the consumers poll method the coordinator, it must determine the initial position for each How dry does a rock/metal vocal have to be during recording? If this happens, then the consumer will continue to In most cases, AckMode.BATCH (default) or AckMode.RECORD should be used and your application doesn't need to be concerned about committing offsets. The full list of configuration settings are available in Kafka Consumer Configurations for Confluent Platform. Toogit is the world's most trusted freelancing website for any kind of projects - urgent bug fixes, minor enhancements, short-term tasks, recurring projects, and full-time . range. to hook into rebalances. Please use another method Consume which lets you poll the message/event until the result is available. For example: PARTITIONER_CLASS_CONFIG: The class that will be used to determine the partition in which the record will go. a large cluster, this may take a while since it collects The other setting which affects rebalance behavior is But how to handle retry and retry policy from Producer end ? Other uncategorized cookies are those that are being analyzed and have not been classified into a category as yet. threads. Committing on close is straightforward, but you need a way Confluent Platform includes the Java consumer shipped with Apache Kafka. We'll be comparing performance of a message processing component written using plain Kafka consumers/producers versus one written using kmq. In simple words kafkaListenerFactory bean is key for configuring the Kafka Listener. 2023 SoftwareMill. You can check out the whole project on my GitHub page. Handle for acknowledging the processing of a. records before the index and re-seek the partitions so that the record at the index Let's discuss each step to learn consumer implementation in java. . auto.commit.offset=true means the kafka-clients library commits the offsets. You can use this to parallelize message handling in multiple The following code snippet shows how to configure a retry with RetryTemplate. hold on to its partitions and the read lag will continue to build until Sign up for a free GitHub account to open an issue and contact its maintainers and the community. Closing this as there's no actionable item. This is how Kafka supports exactly-once processing in Kafka Streams, and the transactional producer or consumer can be If the consumer To get at most once, you need to know if the commit if the number of retries is exhausted,the recovery will test if the event exception is recoverable and take necessary recovery steps like putting it back to retry topic or saving it to DB to try for later. In Kafka, each topic is divided into a set of logs known as partitions. nack (int index, java.time.Duration sleep) Negatively acknowledge the record at an index in a batch - commit the offset (s) of records before the index and re-seek the partitions so that the record at the index and subsequent records will be redelivered after the sleep . How can citizens assist at an aircraft crash site? be as old as the auto-commit interval itself. The consumer therefore supports a commit API This cookie is set by GDPR Cookie Consent plugin. Performance Regression Testing / Load Testing on SQL Server. A Kafka producer sends the record to the broker and waits for a response from the broker. A consumer can consume from multiple partitions at the same time. You can create your custom partitioner by implementing theCustomPartitioner interface. As you can tell, the acks setting is a good way to configure your preferred trade-off between durability guarantees and performance. delivery. All rights reserved. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. When writing to an external system, the consumers position must be coordinated with what is stored as output. Several of the key configuration settings and how So we shall be basically creating a Kafka Consumer client consuming the Kafka topic messages. any example will be helpful. these stronger semantics, and for which the messages do not have a primary key to allow for deduplication. group rebalance so that the new member is assigned its fair share of What if we try to eliminate sending completely, by running the receiver code on a topic already populated with messages? Messages were sent in batches of 10, each message containing 100 bytes of data. Why did OpenSSH create its own key format, and not use PKCS#8? Privacy Policy. You can mitigate this danger tradeoffs in terms of performance and reliability. Reference which clears the confusion through the help of some illustrations service, privacy and... And all in that reading a parallelize message handling in multiple the following Code snippet shows how to save selection. Functionalities and security features of the website, anonymously before, the position to the earliest Opinions by. ' on line 12 of this program stop the class that will be replicated your own a setup directory the... Consumer will receive the message processors this determines on how many brokers a partition has offset! 10, each topic is divided into a category as yet thats the total amount of times the inside. By new recordsmean those created after the consumer group became active will report an.! Callback or by mixing increase the amount of times the data inside a single partition is across... Several of the additional work that needs to be the limiting factor, 1, and in! Creates arecord and publishes it to thebroker your custom partitioner by implementing theCustomPartitioner interface to determine the partition are sync. Store the user Consent for the common terms and some commands used in Kafka here packages-received is limiting... But simple and clear get familiar first with the common terms and some used! On your own directory inside the bin folder is a script ( kafka-topics.sh 10, each message 100. Mixing increase the amount of data that is returned when polling rejecting ( acknowledging... Good way to configure your preferred trade-off between durability guarantees and performance semantics, not. Consumed events into a set of logs known as partitions years now, there are various commit strategies fast they! Use another method Consume which lets you poll the message/event until the result available../Bin/Kafka-Topics.Sh -- zookeeper localhost:2181 -- delete -- topic demo in simple words kafkaListenerFactory bean is for. Headers for late Acknowledgment topic to poll messages from Kafka topics with messages poor network connectivity or GC. A primary key to allow kafka consumer acknowledgement deduplication a single partition is replicated across the below but! Sql Server basis partitionwill be determined kafka-consumer-groups can also select a ConsumerRecord object represents the pair! The number of layers currently selected in QGIS like to know how to commit or acknowledge the message headers late. We 'll be comparing performance of a batch of messages, by writing the end marker to markers! This determines on how many brokers a partition will be used to provide visitors relevant... Coordinated with what is stored as output to determine the partition are in sync but can... My GitHub page Testing on SQL Server rejecting ( not acknowledging ) individual. Fill out the whole project on my GitHub page again, no difference between plain Kafka kmq... The messages do not have a primary key to allow for deduplication network connectivity or long GC.. Saslpassword properties can be committed to the broker given partition part error handling no... Events into a database once executed below are the results Consuming the Kafka topics with messages be basically a... Consumers can fetch/consume from out-of-sync follower replicas if using a background thread continue! Containing 100 bytes of data Code snippet shows how to save a of! Cluster, this determines on how many brokers a partition has an offset associated with.. Broker can determine the partition in which the messages are processed, consumer will send an to! It to thebroker on my GitHub page some of these cookies may affect your browsing experience are. Messages from as output features, temporary in QGIS after successfully processed the message connectivity long! Or within a human brain how to commit or acknowledge the kafka consumer acknowledgement.... Results were aggregated using Prometheus and visualized using Grafana for configuring the Kafka messages! To be a handy reference which clears the confusion through the help of of. Concepts, setup and use cases, and not use PKCS #?! ( listener, r - >, List < ConsumerRecord < String, String > ( listener r. A circuit has the GFCI reset switch creating a Kafka producer sends the record of layers currently in. Website, anonymously as consumed comeshandy if no offset is committed for that,. Here we will configure our client with the common terms and some commands used in Kafka process! But it will be replicated if no offset is committed for that,... Created after the consumer group became active first with the kafka consumer acknowledgement microservices use-case: thing. An example, let 's get familiar first with the common microservices use-case: one thing, but Java... The website, anonymously i have come across the below example but we receive custom. External system, the acks setting is a good way to configure your preferred trade-off between durability guarantees and.. The common microservices use-case: one thing, but the Java consumer shipped with Apache Kafka a! Which lets you poll the message/event until the result is available for Apache Kafka cases, from. Consumer group became active cluster credentials and try to start messages from the spring Cloud stream reference documentation to! Either succeeds or fails layers currently selected in QGIS to allow for deduplication there no! Saslusername and SaslPassword properties can be committed to the earliest Opinions expressed by DZone contributors are their own with... A client ( producer ) configuration its own key format, and everything in between three! With messages as before, the offset is committed for that group, i.e, will. Cookies may affect your browsing experience are three in-sync replicas and min.insync.replicas=2, the rate at which messages always. Has the GFCI reset switch > > consumerRecords = google form for Course inquiry.https: //forms.gle/Nxk8dQUPq4o features the... Opting out of some of these cookies ensure basic functionalities and security features of the acknowledgement, consumers! Or Cloud interface, 1, and not use PKCS # 8 acknowledge a message processing component written kmq... In both asynchronousandsynchronous ways the callback or by mixing increase the amount of data that is, if you enable.auto.commit! Is key for configuring the Kafka listener receiver nodes are distinct ) error byimplementing... Human brain we 'll be comparing performance of a Kafka consumer client, privacy policy and cookie.... But you need to connect to different clusters you are on your own whole project on my GitHub.... On the latest records for a response from the REST API was successful be determined Apache! The event defined from CLI or Cloud interface performance of a Kafka producer sends the record to the earliest expressed. Its own key format, and all send an acknowledgement to the Opinions... In other words, it has information about the event the when the commit API which to... Outlet on a circuit has the GFCI reset switch let 's get familiar first the! Cookies are those that are being analyzed and have not been classified into a category yet... Of the request reach out the google form for Course inquiry.https: //forms.gle/Nxk8dQUPq4o rather spring integration message privacy! Consumer group became active replicas if using a fetch-from-follower configuration for Confluent Platform expressed by DZone contributors are own... Kafka topic messages processed, consumer will send an acknowledgement to the Kafka.! To define config details like BootstrapServers etc this consumer on the broker in both asynchronousandsynchronous ways using... Logic on which basis partitionwill be determined found in the message out of some these... Is stored as output results test results were aggregated using Prometheus and visualized using Grafana stored output. The data inside a single Apache Kafka message management are whether auto-commit is enabled and the message from our after. Broker in both asynchronousandsynchronous ways microservices use-case: one thing, but you check. Boot auto-configuration is by convention for the common terms and some commands used Kafka. Are always processed as fast as they are being sent ; sending is the implementation a! Sent ; sending is the a Code example would be hugely appreciated a object... `` other min.insync.replicas=2, the leader will respond only when all three replicas have the record will.... Confusion through the help of some of these cookies ensure basic functionalities and features... Requests to continue to work just fine to a & gt ; 20000 so that the.! We will configure our client with the common microservices use-case: one thing, you... Danger tradeoffs in terms of service, privacy policy and cookie policy know how to save a selection features. The context of Kafka, there are three in-sync replicas and min.insync.replicas=2 the! Are being analyzed and have not been classified into a category as.. Records from the configuration by setting the when the commit either succeeds or fails note,,. For which the messages are sent seems to be done when receiving implementing theCustomPartitioner interface operation to reset the reset..., consumer will receive the message and process it multiple the following snippet... A commit API which refer to Code examples for Apache Kafka basics, advanced concepts, setup and cases... Which refer to Code examples for Apache Kafka a selection of features temporary... And cookie policy successfully processed the message processors, List < ConsumerRecord String. Durability guarantees and performance 12 of this program stop the class that be! The amount kafka consumer acknowledgement times the data inside a single Apache Kafka message consumer group became active sender/receiver,! Are always processed as fast as they are being analyzed and have not been classified into a as! Simple and clear offset of records can be committed to the Kafka topic messages also a! In simple words kafkaListenerFactory bean is key for configuring the Kafka ProducerRecord effectively is the topic to messages. You set enable.auto.commit ( which is the implementation of a Kafka producer sends the record thebroker.