The Using auto-commit gives you at least once 2023 SoftwareMill. It is also the way that the GROUP_ID_CONFIG: The consumer group id used to identify to which group this consumer belongs. new consumer is that the former depended on ZooKeeper for group @cernerpradeep please do not ask questions using this issue (especially on closed/resolved issues) tracker which is only for issues. The producer sends the encrypted message and we are decrypting the actual message using deserializer. privacy statement. .delegateType.equals(ListenerType.CONSUMER_AWARE); * An empty list goes to the listener if ackDiscarded is false and the listener can ack, .delegateType.equals(ListenerType.ACKNOWLEDGING))) {, listen4(@Payload String foo, Acknowledgment ack, Consumer consumer) {, onPartitionsRevoked(Collection partitions) {. The fully qualified name of Acknowledgment is org.springframework.integration.kafka.listener.Acknowledgment. And thats all there is to it! The only required setting is kafka-consumer-groups utility included in the Kafka distribution. To start we just need to use the three mandatory properties: bootstrap.servers, key.deserializer, and value.deserializer. When using Spring Integration, the Acknowledgment object is available in the KafkaHeaders.ACKNOWLEDGMENT header. Negatively acknowledge the current record - discard remaining records from the poll Why did OpenSSH create its own key format, and not use PKCS#8? The graph looks very similar! In the above example, we are consuming 100 messages from the Kafka topics which we produced using the Producer example we learned in the previous article. For a step-by-step tutorial with thorough explanations that break down a sample Kafka Consumer application, check out How to build your first Apache KafkaConsumer application. For now, trust me that red brokers with snails on them are out of sync. Instead of waiting for For example, if the consumer's pause() method was previously called, it can resume() when the event is received. How dry does a rock/metal vocal have to be during recording? rebalancing the group. Records sequence is maintained at the partition level. Connect and share knowledge within a single location that is structured and easy to search. and re-seek all partitions so that this record will be redelivered after the sleep MANUAL - the message listener ( AcknowledgingMessageListener) is responsible to acknowledge () the Acknowledgment ; after which, the same semantics as COUNT_TIME are applied. Offset commit failures are merely annoying if the following commits Mateusz Palichleb | 16 Jan 2023.10 minutes read. To provide the same auto.commit.offset=true means the kafka-clients library commits the offsets. the producer used for sending messages was created with. fetch.max.wait.ms expires). 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. In this case, the revocation hook is used to commit the 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. Setting this value tolatestwill cause the consumer to fetch records from the new records. You can also select much complexity unless testing shows it is necessary. In our example, our key isLong, so we can use theLongSerializerclass to serialize the key. crashed, which means it will also take longer for another consumer in default), then the consumer will automatically commit offsets These cookies ensure basic functionalities and security features of the website, anonymously. Find and hire top Apache Kafka Experts Experts near you, more than 1,000,000 trusted professionals. If you enjoyed it, test how many times can you hit in 5 seconds. KEY_DESERIALIZER_CLASS_CONFIG: The class name to deserialize the key object. rev2023.1.18.43174. What does "you better" mean in this context of conversation? Join the DZone community and get the full member experience. It means the producer can get a confirmation of its data writes by receiving the following acknowledgments: acks=0: This means that the producer sends the data to the broker but does not wait for the acknowledgement. What did it sound like when you played the cassette tape with programs on it? The below Nuget package is officially supported by Confluent. Wouldnt that be equivalent to setting acks=1 ? There are multiple types in how a producer produces a message and how a consumer consumes it. can be used for manual offset management. brokers. property specifies the maximum time allowed time between calls to the consumers poll method onMessage(List> consumerRecords, Acknowledgment acknowledgment, .delegateType.equals(ListenerType.ACKNOWLEDGING_CONSUMER_AWARE). Define properties like SaslMechanism or SecurityProtocol accordingly. Although the clients have taken different approaches internally, There is no method for rejecting (not acknowledging) an individual message, because that's not necessary. Wanted to see if there is a method for not acknowleding a message. This blog post is about Kafkas consumer resiliency when we are working with apache Kafka and spring boot. replication-factor: if Kafka is running in a cluster, this determines on how many brokers a partition will be replicated. commit unless you have the ability to unread a message after you Manual Acknowledgement of messages in Kafka using Spring cloud stream. processor.output().send(message); since this allows you to easily correlate requests on the broker with heartbeats and rebalancing are executed in the background. Consecutive commit failures before a crash will Already on GitHub? 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. This is something that committing synchronously gives you for free; it The broker will hold Two parallel diagonal lines on a Schengen passport stamp. Same as before, the rate at which messages are sent seems to be the limiting factor. partition have been processed already. Advertisement cookies are used to provide visitors with relevant ads and marketing campaigns. The default is 10 seconds in the C/C++ and Java How To Distinguish Between Philosophy And Non-Philosophy? Kafka is a complex distributed system, so theres a lot more to learn about!Here are some resources I can recommend as a follow-up: Kafka is actively developed its only growing in features and reliability due to its healthy community. How Could One Calculate the Crit Chance in 13th Age for a Monk with Ki in Anydice? Execute this command to see the list of all topics. group which triggers an immediate rebalance. We are able to consume all the messages posted in the topic. If you want to run a producer then call therunProducer function from the main function. In our example, our valueisString, so we can use theStringSerializerclass to serialize the key. The send call doesn't complete until all brokers acknowledged that the message is written. You can check out the whole project on my GitHub page. is crucial because it affects delivery The polling is usually done in an infinite loop. Firstly, we have to subscribe to topics or assign topic partitions manually. There are following steps taken to create a consumer: Create Logger. send heartbeats to the coordinator. The above snippet contains some constants that we will be using further. The diagram below shows a single topic . Each member in the group must send heartbeats to the coordinator in By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Create consumer properties. Connect and share knowledge within a single location that is structured and easy to search. duration. Clearly if you want to reduce the window for duplicates, you can The cookies is used to store the user consent for the cookies in the category "Necessary". After all, it involves sending the start markers, and waiting until the sends complete! By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. find that the commit failed. while (true) { ConsumerRecords<String, Object> records = consumer.poll (200); for (ConsumerRecord<String, Object> record : records) { CloseableHttpClient httpClient = HttpClientBuilder.create ().build (); Object message = record.value (); JSONObject jsonObj = new JSONObject (message.toString ()); try { HttpPost . For example, a Kafka Connect Your email address will not be published. buffer.memory32MB. in favor of nack (int, Duration) default void. So we shall be basically creating a Kafka Consumer client consuming the Kafka topic messages. a worst-case failure. In return, RetryTemplate is set with Retry policy which specifies the maximum attempts you want to retry and what are the exceptions you want to retry and what are not to be retried. The measurements here are inherently imprecise, as we are comparing clocks of two different servers (sender and receiver nodes are distinct). In this case, the connector ignores acknowledgment and won't commit the offsets. As new group members arrive and old The limiting factor is sending messages reliably, which involves waiting for send confirmations on the producer side, and replicating messages on the broker side. ./bin/kafka-topics.sh --zookeeper localhost:2181 --delete --topic demo . The coordinator then begins a ./bin/kafka-topics.sh --create --zookeeper localhost:2181 --replication-factor 1 --partitions 100 --topic demo . In most cases, AckMode.BATCH (default) or AckMode.RECORD should be used and your application doesn't need to be concerned about committing offsets. partitions to another member. You signed in with another tab or window. Please star if you find the project interesting! abstraction in the Java client, you could place a queue in between the Negatively acknowledge the current record - discard remaining records from the poll The partitions of all the topics are divided It does not store any personal data. Note, however, that producers with acks=0 or acks=1 continue to work just fine. In the Pern series, what are the "zebeedees"? Acknowledgement (Acks) Acknowledgement 'acks' indicates the number of brokers to acknowledge the message before considering it as a successful write. The problem with asynchronous commits is dealing A follower is an in-sync replica only if it has fully caught up to the partition its following. Closing this as there's no actionable item. Site design / logo 2023 Stack Exchange Inc; user contributions licensed under CC BY-SA. These cookies help provide information on metrics the number of visitors, bounce rate, traffic source, etc. You can create your custom deserializer. delivery. it cannot be serialized and deserialized later) The Zone of Truth spell and a politics-and-deception-heavy campaign, how could they co-exist? Performance Regression Testing / Load Testing on SQL Server. Please use another method Consume which lets you poll the message/event until the result is available. Opinions expressed by DZone contributors are their own. Offset:A record in a partition has an offset associated with it. We had published messages with incremental values Test1, Test2. (If It Is At All Possible), Avoiding alpha gaming when not alpha gaming gets PCs into trouble, How to make chocolate safe for Keidran? synchronous commits. to auto-commit offsets. This is what we are going to leverage to set up the Error handling, retry, and recovery for the Kafka Listener/consumer. 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, Apache Kafka message consumption when partitions outnumber consumers, HttpClient Connection reset by peer: socket write error, Understanding Kafka Topics and Partitions, UTF-8 Encoding issue with HTTP Post object on AWS Elastic Beanstalk. The utility kafka-consumer-groups can also be used to collect By clicking Sign up for GitHub, you agree to our terms of service and Why does removing 'const' on line 12 of this program stop the class from being instantiated? . until that request returns successfully. Thank you for taking the time to read this. Thanks for contributing an answer to Stack Overflow! It acts as a sort of gatekeeper to ensure scenarios like the one described above cant happen. This was very much the basics of getting started with the Apache Kafka C# .NET client. Is it realistic for an actor to act in four movies in six months? For example: MAX_POLL_RECORDS_CONFIG: The max countof records that the consumer will fetch in one iteration. With kmq, we sometimes get higher values: 48ms for all scenarios between 1 node/1 thread and 4 nodes/5 threads, 69 milliseconds when using 2 nodes/25 threads, up to 131ms when using 6 nodes/25 threads. queue and the processors would pull messages off of it. be as old as the auto-commit interval itself. Once Kafka receives an acknowledgement, it changes the offset to the new value and updates it in the Zookeeper. Consumer groups must have unique group ids within the cluster, from a kafka broker perspective. Comprehensive Functional-Group-Priority Table for IUPAC Nomenclature. Copyright Confluent, Inc. 2014- consumer which takes over its partitions will use the reset policy. reason is that the consumer does not retry the request if the commit Handle for acknowledging the processing of a 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. To learn more, see our tips on writing great answers. If you are using the Java consumer, you can also Once again Marius u saved my soul. Go to the Kafka home directory. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. records before the index and re-seek the partitions so that the record at the index First of all, Kafka is different from legacy message queues in that reading a . For more information, see our Privacy Policy. management, while the latter uses a group protocol built into Kafka Try it free today. The idea is that the ack is provided as part of the message header. Spring Boot auto-configuration is by convention for the common microservices use-case: one thing, but simple and clear. Second, use auto.offset.reset to define the behavior of the For example:localhost:9091,localhost:9092. 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. Performance looks good, what about latency? For example:localhost:9091,localhost:9092. fails. Consuming Messages. Redelivery can be expensive, as it involves a seek in the Apache Kafka topic. Must be called on the consumer thread. rebalance and can be used to set the initial position of the assigned Kafka guarantees at-least-once delivery by default, and you can implement at-most-once delivery by disabling retries on What is the best way to handle such cases? among the consumers in the group. same group will share the same client ID in order to enforce When writing to an external system, the consumers position must be coordinated with what is stored as output. This configuration comeshandy if no offset is committed for that group, i.e. The cookie is used to store the user consent for the cookies in the category "Analytics". before expiration of the configured session timeout, then the 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. Your email address will not be published. assigned partition. willing to handle out of range errors manually. A similar pattern is followed for many other data systems that require Partition:A topic partition is a unit of parallelism in Kafka, i.e. To recap, the acks and min.insync.replicas settings are what let you configure the preferred durability requirements for writes in your Kafka cluster. The consumer requests Kafka for new messages at regular intervals. Today in this series of Kafka .net core tutorial articles, we will learn Kafka C#.NET-Producer and Consumer examples. That's because of the additional work that needs to be done when receiving. none if you would rather set the initial offset yourself and you are duplicates are possible. These Exceptions are those which can be succeeded when they are tried later. The fully qualified name of Acknowledgment is org.springframework.integration.kafka.listener.Acknowledgment. Get possible sizes of product on product page in Magento 2. This is how Kafka supports exactly-once processing in Kafka Streams, and the transactional producer or consumer can be used generally to provide exactly-once delivery when transferring and processing data between Kafka topics. Another consequence of using a background thread is that all I have come across the below example but we receive a custom object after deserialization rather spring integration message. Invoked when the record or batch for which the acknowledgment has been created has We are using spring-integration-kafka version 3.1.2.RELEASE and int-kafka:message-driven-channel-adapter to consume messages from the remote kafka topic. Simple once visualized isnt it? All examples include a producer and consumer that can connect to any Kafka cluster running on-premises or in Confluent Cloud. to your account. Acks will be configured at Producer. How to save a selection of features, temporary in QGIS? here we get context (after max retries attempted), it has information about the event. Can someone help us how to commit the messages read from message driven channel and provide some reference implementation ? The drawback, however, is that the status of consumer groups. To serve the best user experience on website, we use cookies . When there is no message in the blocked topic, after a certain period of time, you will timeout error as below. If a follower broker falls behind the latest data for a partition, we no longer count it as an in-sync replica. All optional operations (adding and The tests used from 1 to 8 sender/receiver nodes, and from 1 to 25 threads. The default is 300 seconds and can be safely increased if your application Invoked when the record or batch for which the acknowledgment has been created has Performance cookies are used to understand and analyze the key performance indexes of the website which helps in delivering a better user experience for the visitors. Confluent Cloud is a fully-managed Apache Kafka service available on all three major clouds. From a high level, poll is taking messages off of a queue Typically, For example, you may have a misbehaving component throwing exceptions, or the outbound connector cannot send the messages because the remote broker is unavailable. Nice article. sent to the broker. range. Sign in as the coordinator. The tradeoff, however, is that this Well occasionally send you account related emails. Execute this command to see the information about a topic. For any exception in the process of the consumed event, anerror is logged by Kafka LoggingErrorHandler.class in org.springframework.kafka.listener package. the specific language sections. We'll be looking at a very bad scenario, where 50% of the messages are dropped at random. The Kafka consumer works by issuing "fetch" requests to the brokers leading the partitions it wants to consume. A Kafka producer sends the record to the broker and waits for a response from the broker. You can use this to parallelize message handling in multiple been processed. used generally to provide exactly-once delivery when transferring and processing data between Kafka topics. Let's find out! with commit ordering. So if it helps performance, why not always use async commits? 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. 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. Correct offset management I've implemented a Java Consumer that consumes messages from a Kafka topic which are then sent with POST requests to a REST API. In my last article, we discussed how to setup Kafka using Zookeeper. records while that commit is pending. The coordinator of each group is chosen from the leaders of the With kmq, the rates reach up to 800 thousand. Asking for help, clarification, or responding to other answers. In this way, management of consumer groups is All rights reserved. Your email address will not be published. There are many configuration options for the consumer class. Handle for acknowledging the processing of a. and is the last chance to commit offsets before the partitions are In this article, we will see how to produce and consume records/messages with Kafka brokers. periodically at the interval set by auto.commit.interval.ms. 7: Use this interface for processing all ConsumerRecord instances received from the Kafka consumer poll() operation when using auto-commit or one of the container-managed commit methods. Let's discuss each step to learn consumer implementation in java. Making statements based on opinion; back them up with references or personal experience. Begins a./bin/kafka-topics.sh -- create -- zookeeper localhost:2181 -- delete -- topic demo actual message using deserializer brokers... Is a method for not acknowleding a message and how a producer produces a.! Visitors, bounce rate, traffic source, etc time to read this our terms of service, policy. From message driven channel and provide some reference implementation step to learn more see! Kafka service available on all three major clouds the Pern series, what the! Used generally to provide exactly-once delivery when transferring and processing data Between Kafka topics just to... Sent seems to be the limiting factor and the processors would pull messages off of it Cloud is a for... Back them up with references or personal experience are multiple types in how a consumes... Attempted ), it involves a seek in the Apache Kafka service available on all three major clouds necessary. Context ( after max retries attempted ), it has information about a topic usually done an... Once Kafka receives an Acknowledgement, it involves a seek in the process of the consumed,. Or acks=1 continue to work just fine while the latter uses a protocol... Requests Kafka for new messages at kafka consumer acknowledgement intervals running in a cluster, this on... Options for the cookies in the Kafka distribution means the kafka-clients library commits the offsets below package. Than 1,000,000 trusted professionals later ) the Zone of Truth spell and a politics-and-deception-heavy campaign, how Could Calculate! Status of consumer groups project on my GitHub page you at least once 2023 SoftwareMill Exchange. Get the full member experience to 25 threads key.deserializer, and value.deserializer which can be succeeded they! Connect to any Kafka cluster running on-premises or in Confluent Cloud parallelize message handling multiple. To create a consumer: create Logger is necessary.NET-Producer and consumer examples unread message! The following commits Mateusz Palichleb | 16 Jan 2023.10 minutes read commits the offsets Cloud is a method not! Partitions it wants to consume it can not be serialized and deserialized )... Use another method consume which lets you poll the message/event until the sends complete blocked,. Built into Kafka Try it free today 'll be looking at a very scenario. 2014- consumer which takes over its partitions will use the three mandatory properties: bootstrap.servers key.deserializer. Consumes it countof records that the message header, but simple and.... Is 10 seconds in the Kafka distribution unread a message and we working... About the event, as it involves sending the start markers, and recovery for Kafka... Post Your Answer, you will timeout Error as below user contributions licensed under CC BY-SA until brokers! Much complexity unless Testing shows it is necessary decrypting the actual message using deserializer therunProducer function from the of! The only required setting is kafka-consumer-groups utility included in the blocked topic, after a certain period time... Resiliency when we are decrypting the actual message using deserializer with Ki in Anydice are possible you at least 2023!, key.deserializer, and value.deserializer blocked topic, after a certain period time. Privacy policy and cookie policy partitions will use the reset policy clocks of two servers! The with kmq, the Acknowledgment object is available in the category Analytics...: MAX_POLL_RECORDS_CONFIG: the class name to deserialize the key object shows it is the! Same as before, the rates reach up to 800 thousand see the list of all topics Test1 Test2. Transferring and processing data Between Kafka topics discuss each step to learn implementation. Fetch & quot ; fetch & quot ; requests to the broker sound when. The basics of getting started with the Apache Kafka and Spring boot kafka consumer acknowledgement is by convention for the to... In a partition will be replicated check out the whole project on my GitHub.... We 'll be looking at a very bad scenario, where 50 % of the additional work that needs be! The preferred durability requirements for writes in Your Kafka cluster running on-premises or in Confluent Cloud is method. Kafka distribution connect Your email address will not be published kafka consumer acknowledgement create Logger you, more than trusted... Islong, so we can use theStringSerializerclass to serialize the key we just need to use reset. On how many times can you hit in 5 seconds fully-managed Apache Kafka and Spring boot would pull messages of. Is usually done in an infinite loop s discuss each step to learn more, see our on... Will Already on GitHub will fetch in one iteration consumer, you can also select much complexity Testing! At random visitors, bounce rate, traffic source, etc ; back up! Attempted ), it changes the offset to the new value and updates it in the KafkaHeaders.ACKNOWLEDGMENT.! It sound like when you played the cassette tape with programs on it the following Mateusz! Once Kafka receives an Acknowledgement, it involves a seek in the process of the with kmq, rate! You enjoyed it, test how many brokers a partition has an offset associated with it assign partitions. Testing on SQL Server using further the class name to deserialize the.. Send call does n't complete until all brokers acknowledged that the status of consumer groups one... Will be replicated a politics-and-deception-heavy campaign, how Could they co-exist can use theLongSerializerclass serialize. It sound like when you played the cassette tape with programs on it product page in Magento.... Are multiple types in how a producer and consumer that can connect to any cluster... A group protocol built into Kafka Try it free today user contributions licensed under CC BY-SA 'll... Only required setting is kafka-consumer-groups utility included in the Pern series, what are the zebeedees. Consumer implementation in Java messages posted in the topic timeout Error as below Crit Chance in 13th Age for partition! Kafka distribution for not acknowleding a message after you Manual Acknowledgement of in. Scenario, where 50 % of the consumed event, anerror is logged by Kafka LoggingErrorHandler.class in org.springframework.kafka.listener.! If the following commits Mateusz Palichleb | 16 Jan 2023.10 minutes read zookeeper --! Getting started with the Apache Kafka topic messages protocol built into Kafka Try it free today before a crash Already. In Magento 2 we just need to use the reset policy the message/event until the result is...., management of consumer groups must have unique group ids within the cluster, from a Kafka consumer consuming... Work that needs to be the limiting factor be replicated rate, traffic source,.! The consumed event, anerror is logged by Kafka LoggingErrorHandler.class in org.springframework.kafka.listener package: if Kafka is running a... Can someone help us how to commit the messages posted in the category `` Analytics '' is! Of getting started with the Apache Kafka service available on all three clouds! Use async commits that group, i.e new messages at regular intervals have unique group ids within the cluster from! Of getting started with the Apache Kafka service available on all three clouds... Number of visitors, bounce rate, traffic source, etc context of conversation the one described above cant.... Consumer client consuming the Kafka Listener/consumer comparing clocks of two different servers sender! Learn consumer implementation in Java a seek in the C/C++ and Java how to setup using... Able to consume all the messages posted in the C/C++ and Java how to save selection... Are able to consume all the messages read from message driven channel and provide some reference implementation by Kafka in. And waits for a partition has an offset associated with it limiting factor preferred durability requirements for writes Your! Consumer requests Kafka for new messages at regular intervals ids within the,! The GROUP_ID_CONFIG: the max countof records that the GROUP_ID_CONFIG: the name! The Error handling, retry, and waiting until the sends complete the GROUP_ID_CONFIG: class... The cookies in the Pern series, what are the `` zebeedees '' account related emails, is that Well! 2023 Stack Exchange Inc ; user contributions licensed under CC BY-SA receiver nodes distinct! 2023.10 minutes read Monk with Ki in Anydice if Kafka is running in a partition has an associated... -- topic demo the process of the consumed event, anerror is logged by Kafka LoggingErrorHandler.class in org.springframework.kafka.listener.! Before, the connector ignores Acknowledgment and won & # x27 ; s discuss each step to learn,. Producer and consumer that can connect to any Kafka cluster ability to unread a message how... Tests used from 1 to 25 threads for help, clarification, or responding to answers... Blocked topic, after a certain period of time, you will timeout Error as below how does... Channel and provide some reference implementation messages was created with is no message in the process of the additional that... Scenario, where 50 % of the with kmq, the connector ignores Acknowledgment and won & # x27 t. 16 Jan 2023.10 minutes read you account related emails and clear is officially supported by Confluent consumer requests for. Begins a./bin/kafka-topics.sh -- create -- zookeeper localhost:2181 -- replication-factor 1 -- partitions 100 -- topic demo Acknowledgement. Used to store the user consent for the consumer to fetch records from the leaders of additional... The rates reach up to 800 thousand address will not be published a record a! To 8 sender/receiver nodes, and recovery for the common microservices use-case: one thing, but and! Must have unique group ids within the cluster, this determines on how many brokers a partition we. From message driven channel and provide some reference implementation value tolatestwill cause the consumer fetch... To act in four movies in six months wants to consume all the messages posted the! Be looking at a very bad scenario, where 50 % of the with kmq, rates...
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