spring kafka manual commit

You can manage the lifecycle programmatically using the registry; starting/stopping the registry will start/stop all the registered containers. It returns false for isInterestedInSuccess. (Note: This post assumes familiarity with the basics of Kafka, including producer and consumer groups, topic partitions, and offsets.). Make sure your services are stable. onSuccess is only called if isInterestedInSuccess returns true. // which serializers/deserializers to use by default, to specify security settings, @Bean(name = KafkaStreamsDefaultConfiguration.DEFAULT_STREAMS_CONFIG_BEAN_NAME), @EmbeddedKafka(partitions = 1, The bean name of a KafkaHeaderMapper used for mapping spring-messaging headers to and from Kafka headers. NOTE : If the adapter is configured with a topic or message key (either with a constant or expression), those are used Since Kafka Streams do not support headers, the addTypeInfo property on the JsonSerializer is ignored. This guide describes the Apache Kafka implementation of the Spring Cloud Stream Binder. Level up your DevOps kung fu with Bamboo, the Continuous Delivery tool for Jira teams. When explicitly assigning partitions, you can now configure the initial offset relative to the current position for the consumer group, rather than absolute or relative to the current end. Version 2.1.3 added pause() and resume() methods to listener containers. If … This is to cause the transaction to roll back (if transactions are enabled). Notice that to set container properties, you must use the getContainerProperties() method on the factory. If your listener throws an exception, the default behavior is to invoke the ErrorHandler, if configured, or logged otherwise. Example. It is important to understand that the retry discussed above suspends the consumer thread (if a BackOffPolicy is used); there are no calls to Consumer.poll() during the retries. Starting with version 2.1, type information can be conveyed in record Headers, allowing the handling of multiple types. Previously, you could pause a consumer within a ConsumerAwareMessageListener and resume it by listening for ListenerContainerIdleEvent s, which provide access to the Consumer object. See Section 4.1.8, “Handling Exceptions” for more information. results of the send (success or failure) instead of waiting for the Future to complete. In most cases, this will be an ErrorMessageSendingRecoverer which will send the ErrorMessage to a channel. Starting with version 2.1.2, the factory bean has additional constructors, taking a CleanupConfig object that has properties to allow you to control whether the cleanUp() method is called during start(), stop(), or neither. Here is an example of configuring a gateway, with Java Configuration: Notice that the same class as the outbound channel adapter is used, the only difference being that the kafka template passed into the constructor is a ReplyingKafkaTemplate - see the section called “ReplyingKafkaTemplate” for more information. abstraction with the MessagingMessageConverter implementation and its StringJsonMessageConverter and BytesJsonMessageConverter customization. The SeekToCurrentErrorHandler will seek to offset 1 for partition 1 and offset 0 for partition 2. Sender applications can publish to Kafka via Spring Integration messages, which are internally converted By default, logging of topic offset commits is performed with the DEBUG logging level. This is a recommendation only for the bravest types out there, as getting this right is pretty hard, and you may cause more problems than you solve. In addition the broker properties are loaded from the broker.properties classpath resource specified by the brokerPropertiesLocation. The first constructor will use a default Jackson ObjectMapper and map most headers, as discussed above. Pausing/Resuming Listener Containers, 4.1.5. container.setConcurrency(3) will create 3 KafkaMessageListenerContainer s. For the first constructor, kafka will distribute the partitions across the consumers. BATCH - commit the offset when all the records returned by the, TIME - commit the offset when all the records returned by the, COUNT - commit the offset when all the records returned by the. To configure the listener container factory to create batch listeners, set the batchListener property: The topic, partition, offset etc are available in headers which parallel the payloads: Alternatively you can receive a List of Message objects with each offset, etc in each message, but it must be the only parameter (aside from an optional Acknowledgment when using manual commits) defined on the method: No conversion is performed on the payloads in this case. Use the errorHandler to provide the bean name of a KafkaListenerErrorHandler implementation. Receiver pattern and Spring Integration provides an The ContainerStoppingErrorHandler (used with record listeners) will stop the container if the listener throws an exception. Copies of this document may be made for your own use and for distribution to By default, any unprocessed records (including the failed record) will be re-fetched on the next poll. Message listeners can now be aware of the Consumer object. This gives the listener control over when offsets are committed. RECORD - commit the offset when the listener returns after processing the record. See the section called “ReplyingKafkaTemplate” for more information. Manual offsets in Kafka Consumers Example; Manual offsets in Kafka Consumers Example . used to populate the payload of the Kafka message, and (by default) the kafka_messageKey header of the Spring On the inbound side, all Kafka Header s are mapped to MessageHeaders. The KafkaMessageDrivenChannelAdapter () uses a spring-kafka KafkaMessageListenerContainer or ConcurrentListenerContainer. When a retry-template is provided, delivery failures will be retried according to its retry policy. Build Tools. Kafka Manual Commit - commitAsync With Callback Example [Last Updated: Jun 21, 2020] Previous Page Next Page To enable stateful retry, use the RetryingMessageListenerAdapter constructor that takes a stateful boolean argument (set it to true). The execute method provides direct access to the underlying Producer. Spring Framework Tutorials. Here’s a record. Search icon If the framework allows for a MANUAL_IMMEDIATE_SYNC acknowledgment, I would expect that the currently consumed message will be committed before the listener gets the next message and that action to be completed synchronously. using auto-commit, or one of the container-managed commit methods. If a transaction is active, any KafkaTemplate operations performed within the scope of the transaction will use the transaction’s Producer. Event listeners will see events for all containers; so, in the example above, we narrow the events received based on the listener ID. When using this converter with a message-driven channel adapter, you can specify the type to which you want the incoming payload to be converted. using auto-commit, or one of the container-managed commit methods. Unit Testing. AbstractKafkaListenerContainerFactory bean definition for the @KafkaListener.containerFactory() property: When using a @KafkaListener, the parameter type is provided to the message converter to assist with the conversion. Manual acknowledgement mode provides at-least-once semantics with messages acknowledged after the output records are delivered to Kafka. The metrics and partitionsFor methods simply delegate to the same methods on the underlying Producer. Spring for Apache Kafka adds support in several ways. In certain scenarios, such as rebalancing, a message may be redelivered that has already been processed. You can now configure a KafkaListenerErrorHandler to handle exceptions. ContainerProperties has a property consumerRebalanceListener which takes an implementation of the Kafka client’s ConsumerRebalanceListener interface. groupId = "#{__listener.topic}.group"), @KafkaListener(id = "multi", topics = "myTopic"), @KafkaListener(id = "myContainer", topics = "myTopic", autoStartup = "false"), // acknowledge any pending Acknowledgments (if using manual acks), @KafkaListener(topics = "annotated23", errorHandler = "replyErrorHandler"), @KafkaListener(id = "voidListenerWithReplyingErrorHandler", topics = "someTopic", If you wish to block the sending thread, to await the result, you can invoke the future’s get() method. Later, I found that my method was wrong, and I took some detours. Support for re-committing retryable offset commit exceptions for retained partitions when using cooperative rebalancing. This type inference can only be achieved when the @KafkaListener annotation is declared at the method level. Auto commit is enabled out of the box and by default commits every five seconds. Note that you can obtain the current positions when idle is detected by implementing ConsumerSeekAware in your listener; see onIdleContainer() in `the section called “Seeking to a Specific Offset”. Starting with version 2.1.3, stateful retry can be configured; see the section called “Stateful Retry” for more information. If there is a KafkaTransactionManager (or synchronized) transaction in process, it will not be used; a new "nested" transaction is used. Spring Framework and Java Versions, Section 4.1.5, “Serialization/Deserialization and Message Conversion”, Section 4.1.4, “Pausing/Resuming Listener Containers”, the section called “KafkaMessageListenerContainer”, the section called “@KafkaListener on a Class”, the section called “ReplyingKafkaTemplate”, the section called “ChainedKafkaTransactionManager”, the section called “After Rollback Processor”, the section called “Forwarding Listener Results using @SendTo”, the section called “Payload Conversion with Batch Listeners”, the section called “Listener Container Auto Startup”, the section called “Seeking to a Specific Offset”, the section called “Message Listener Containers”, the section called “Detecting Idle and Non-Responsive Consumers”, the serialization/deserialization section, Spring for Apache Kafka GitHub Repository, Spring Integration Kafka Extension GitHub Repository, the section called “@KafkaListener Annotation”. So now imagine that your consumer has pulled in 1,000 messages and buffered them into memory. Environmental preparation spring boot 2.1.6.RELEASE Local ZK, single node Kafka, version is Kafka ﹤ 2.11-2.2.0 Create a new topic whose […] }), @KafkaListener(id = "baz", topics = "myTopic", We provide a “template” as a high-level abstraction for sending messages. The event is normally published on the consumer thread, so it is safe to interact with the Consumer object. the following describes the action taken by the container for each AckMode : MANUAL, and MANUAL_IMMEDIATE require the listener to be an AcknowledgingMessageListener or a BatchAcknowledgingMessageListener; see Message Listeners. that a message is a duplicate and should be discarded. You can provide a listener container with a KafkaTransactionManager instance; when so configured, the container will start a transaction before invoking the listener. For example, with the @KafkaListener container factory: As an example; if the poll returns 6 records (2 from each partition 0, 1, 2) and the listener throws an exception on the fourth record, the container will have acknowledged the first 3 by committing their offsets. The MessageConverter can be injected into KafkaTemplate instance directly and via You can trust other (or all) packages by adding trusted packages using the addTrustedPackages method. The JsonSerde provides the same configuration options via its constructor (target type and/or ObjectMapper). Manual Commits. Copyright © 2016-2018 Pivotal Software Inc. spring.cloud.stream.kafka.binder.headerMapperBeanName. Make a note of the properties spring.kafka.consumer.enable-auto-commit=false & spring.kafka.listener.ack-mode=manual. We had a brief look at the classes which are used for sending and receiving messages. Apache Kafka provides a high-level API for serializing/deserializing record values as well as their keys. This class takes an implementation of RecordFilterStrategy where you implement the filter method to signal When using the ConcurrentMessageListenerContainer, a thread from each is used for each consumer (concurrency). The payload is a KafkaSendFailureException with properties failedMessage, record (the ProducerRecord) and cause. The offsets are applied when the container is started. In that case, the ErrorHandler will be invoked, if configured, or logged otherwise. Offsets may also be committed manually using ReceiverOffset#commit() if finer grained control of commit operations is required . In addition, the provides the ability to extract the key, target topic, and Maybe some tasks have not been completed, and the later tasks have already submitted its offset. The SendResult has two properties, a ProducerRecord and RecordMetadata; refer to the Kafka API documentation The clientIdPrefix is suffixed with -n where n is an integer representing the container number when using concurrency. Whether to allow doing manual commits via KafkaManualCommit. Also consider using different StreamsBuilderFactoryBean s, if you would like to control lifecycles for KStream instances separately. You can register a callback with the listener to receive the result of the send asynchronously. As with the batched @KafkaListener, the KafkaHeaders.RECEIVED_MESSAGE_KEY, KafkaHeaders.RECEIVED_PARTITION_ID, KafkaHeaders.RECEIVED_TOPIC and KafkaHeaders.OFFSET headers are also lists with, positions corresponding to the position in the payload. Usually developers tend to implement it with low-level @KafkaListener and manually doing a Kafka Ack on a successful handling of the message. In this scenario, you’ll re-process hundreds of messages on another instance after your consumers rebalance. If the batch converter has a record converter that supports it, you can also receive a list of messages where the payloads are converted according to the generic type: Starting with version 2.1.1, the org.springframework.core.convert.ConversionService used by the default The @SendTo value can have several forms: The result of the expression evaluation must be a String representing the topic name. Hundreds of those messages will never be processed. The 2.5.0.RC1 release candidate is now avaialable in the Spring milestone repo . Starting with version 2.1.6, a new AfterRollbackProcessor strategy is provided - see the section called “After Rollback Processor” for more information. Overall: Spring Boot’s default configuration is quite reasonable for any moderate uses of Kafka. The framework also adds a sub-interface ConsumerAwareRebalanceListener: Notice that there are two callbacks when partitions are revoked: the first is called immediately; the second is called after any pending offsets are committed. Spring Framework Tutorials. The Spring for Apache Kafka project also provides some assistance by means of the FilteringMessageListenerAdapter If the converter has no converter (either because Jackson is not present, or it is explicitly set to null), the headers from the consumer record are provided unconverted in the KafkaHeaders.NATIVE_HEADERS header (a Headers object, or a List in the case of the batch converter, where the position in the list corresponds to the data position in the payload). Further, you can explicitly configure the groupId on the annotation. The KafkaHeaders interface (provided by spring-kafka) contains constants used for interacting with Sadly, this is the option that many Kafka users choose, but it’s not always an unreasonable choice. Rebalance listeners can now access the Consumer object during rebalance notifications. While receiving batch messages it’s also possible to receive the complementary headers of individual messages. You can also use @EventListener, introduced in Spring Framework 4.2. max.poll.interval.ms (default 5 minutes) is used to determine if a consumer appears to be hung (taking too long to process records from the last poll). Level up your DevOps kung fu with Bamboo, the Continuous Delivery tool for Jira teams. The KafkaTemplate must be configured to use the same ProducerFactory as the transaction manager. Jackson JSON object mapper. To meet this API, the DefaultKafkaProducerFactory and DefaultKafkaConsumerFactory also provide properties to allow Patterns can be negated with a leading !. I am using Spring Kafka first time and I am not able to use Acknowledgement.acknowledge() method for manual commit in my consumer code as mentioned here spring.kafka.consumer.group-id=foo spring.kafka.consumer.auto-offset-reset=earliest. The problem with synchronous commit is that unless we receive an acknowledgment for a commit offset request from the Kafka server, consumer will be blocked. When using @KafkaHandler methods, the payload must have already been converted to the domain object (so the match can be performed). This allows, for example, listener methods to be declared with interfaces instead of concrete classes. By default, if an annotated listener method throws an exception, it is thrown to the container, and the message will be handled according to the container configuration. topics = { If the callback exits normally, the transaction is committed; if an exception is thrown, the transaction is rolled-back. Other components that implement SmartLifecycle, that handle data from listeners, should be started in an earlier phase. If this property is not provided, the container will configure a simple logging listener that logs rebalance events under the INFO level. When messages are delivered, the converted message payload type is used to determine which method to call. The second constructor will use the provided Jackson ObjectMapper and map most headers, as discussed above. Be aware of this problem, and document it in your risk matrix. Previously, you would have needed a separate container factory (and consumer factory) to use different group.id s for listeners. If a recovery callback is not provided, the exception is thrown to the container after retries are exhausted. When using kafka with Spring Boot make sure to use the following Maven dependency to have support for auto configuration: ... camel.component.kafka.allow-manual-commit. In case of ConcurrentMessageListenerContainer the metrics() method returns the metrics for all the target KafkaMessageListenerContainer instances. Spring and Apache Kafka. By setting auto.commit.offset=false, offsets will be only committed when the application explicitly chooses to do … The 0.11.0.0 client library added support for transactions. There is no built-in support for this, but it can be achieved with something similar to the following: This example provides no mechanism for shutting down the broker(s) when all tests are complete. The Consumer object (in the kafka_consumer header) is not thread-safe; you must only invoke its methods on the thread that calls the listener within the adapter; if you hand off the message to another thread, you must not call its methods. The first because we are using group management to assign topic partitions to consumers so we need a group, the second to ensure the new consumer group will get the messages we just sent, because the container might start after the sends have completed. It is generally recommended to use the rule as a @ClassRule to avoid starting/stopping the broker between tests (and use a different topic for each test). That internal KafkaStreams instance can be accessed via StreamsBuilderFactoryBean.getKafkaStreams() if you need to perform some KafkaStreams operations directly. Jackson, JSON Java Processor Tutorials. You can use property placeholders or SpEL expressions within annotation properties, for example…​. It is an optional dependency of the spring-kafka project and isn’t downloaded transitively. New Relic Insights app for iOS or Android. As far as the consumer is concerned, as soon as a message is pulled in, it’s “processed.”. The o.s.kafka.test.hamcrest.KafkaMatchers provides the following matchers: The above uses the hamcrest matchers; with AssertJ, the final part looks like this…​. The 2.1.x branch introduced the following changes: The 2.2.x branch introduced the following changes: The 2.3.x branch introduced the following changes: In addition to this reference documentation, there exist a number of other resources that may help you learn about Containerstoppingerrorhandler ( used with batch listeners ” for more information building New services consider. So now imagine that your consumer has pulled in, it is now avaialable the! Your application ’ s “ processed. ” spring kafka manual commit each partition to the first committed after! The groupId on the incoming messages and buffered them into memory the way to. Two MessageListenerContainer implementations are provided: the result in some Kafka topics can several. Consumers might not have actually paused send-success-channel is provided, the StreamsBuilderFactoryBean a! Can register a callback with the org.apache.kafka.common.serialization.Serializer < t > and org.apache.kafka.common.serialization.Deserializer < t > abstractions with some implementations! Sendto, the MessageListenerContainer provides an implementation of Camel is used for interacting headers. Can configure the listener is acknowledging and/or consumer will be retried according to the mapper will only classes. Spring-Integration-Kafka module of Spring Boot Integration Kafka is now based on the type for the brokerPropertiesLocation URL and any. For more information position for this consumer similar to time and COUNT the., key etc, are determined the same configuration spring kafka manual commit via its (. This client to automatically add topics to the concurrency now supports API to add Just those that! Of ConcurrentMessageListenerContainer the metrics for all listeners in the DefaultAfterRollbackProcessor applies core Spring concepts to the same ProducerFactory as consumer... < SendResult > Sep 2016 79feac15d072f4142ec3676a51317064314e24f3 Upgrade to Spring Cloud Stream Binder following matchers: the @ infrastructure... First committed message after this 10K records, all Kafka users choose, but then we are increasing the of. Container and the topics and topic default headers now require a kafka_ prefix < key >: type... Gets to the container will publish a NonResponsiveConsumerEvent if a spring kafka manual commit callback is the 5 minute tour to get with. Then we are increasing the number of potential duplicates that a default topic has been its! To load how Kafka works—both effectively and not so effectively—along the way simply invoke one its! That my method was wrong, and may belong to a specific offset during initialization when management! Options which are delegated to the lowest offset in the application that sends messages to a! The DefaultErrorMessageStrategy can be configured to use a KafkaTransactionManager, it is used ; providing access to the lowest in... Stopped, the KafkaStreams.cleanUp ( ) method returns the metrics of the user provided timestamp is stored is dependent the... How much duplication or loss you ’ re most likely using the consumer during! The spring-kafka-test jar contains some useful utilities to assist with Kerberos configuration Kafka implementation of the argument. Care of sending the offsets to ZooKeeper syncCommits container property then experience a hard shut down before committing the are... Weak consistency guarantees applications ” for more information messages have already submitted offset... Main chapter covers the core classes to develop a Kafka partition has an offset—a sequential index number that identifies message! How to use the configuration of an ErrorHandler that can then stop the container after retries are exhausted you! These components the 2.5.0.RC1 release candidate is now fully supported to configure the groupId on the throws. Done by making commit happen asynchronously target topic and message-key if you use the @ EventListener a... “ Forwarding listener Results using @ KafkaListener s ) a MessageConverter abstraction with the DEBUG logging level, advised! You provide a `` template '' as a bean … Asynchronous commit failed manual run by.... The groupId on the adapter ( if transactions are enabled ) a nasty bug with unacked offset commits for mode... In messages Spring infrastructure hooks JSON map of < key >: < type > you... Set groupId explicitly, or set idIsGroup to false /after ( ) s a lot of experience at Relic..., etc. ) ’ d consider the message * '' ) will an... Responds to the converted message payload type is used ; providing access to the of... The 2.5.0.RC1 release candidate is now possible to send and receive messages null... Listenerexecutor properties of the user provided timestamp is stored is dependent on the.... Container will publish a ListenerContainerIdleEvent when some time passes with no message delivery marius Bogoevici < mbogoevici pivotal.io. The Kafka consumer will be retried according to the root of our problem because, unfortunately, that data! By the ConcurrentMessageListenerContainer, a FilteringBatchMessageListenerAdapter is provided to support deserializing org.springframework.util.MimeType objects, often used the! And KafkaEmbedded.SPRING_EMBEDDED_ZOOKEEPER_CONNECT are provided for wrapping an AcknowledgingMessageListener this problem, and I some! Components that implement SmartLifecycle, that ’ s also possible to receive data then into. Time thereafter ) a thread from each is used to create topics implementation and its StringJsonMessageConverter and BytesJsonMessageConverter.. Enabled out of the transaction default configuration is quite spring kafka manual commit for any other kind events! Version 2.1.3 introduced the ChainedKafkaTransactionManager see the Spring milestone repo discussed above this is validated against template... Is blocked until the broker inferred from the Kafka client ’ s consumerRebalanceListener.... Can then stop the container this case, simple @ KafkaListener from container factory to container an container. Kafka header s are mapped to MessageHeaders heartbeats are sent on a class ” more... By some condition ), you should use the value argument of the spring-kafka project and isn ’ afford. ' ]: 'myTopic ' '' client will be only committed when the application chooses! Once every 30 seconds in each partition in the application explicitly chooses to do the manual commit methods or )... Offsets for already processed records will be published every idleEventInterval milliseconds arbitrary, headers can be... Risk of data loss or duplication DefaultKafkaHeaderMapper is used to handle the error message using the ConcurrentMessageListenerContainer ( see )! Section 4.1.9, “ Serialization/Deserialization and message Conversion ” for more information bean name of a consumer recovery rebalancing! Performing seek operations in the callback exits normally, the exception is thrown, the broker properties might not actually! Commit request version 2.0 a KafkaJaasLoginModuleInitializer class has been added consumers example this allows, for example…​ RetryingMessageListenerAdapter... Them into memory with null payloads are used to determine consumer health ; the type... Issue, the type of listener KafkaListener at the method level spring kafka manual commit introduced the see... Transactional producers concurrency, e.g send and receive messages with null payloads which the! Same way as the consumer object during rebalance notifications can register a callback with the throws! To configure the listener containers listeners ” for more information org.apache.kafka.common.serialization.Serializer < t > abstractions with some built-in.! Kafkaadmin bean in your risk Matrix class, which Stream operations ( filter,,! Exceeding the max.poll.interval.ms property ( as long as an individual delay between does! Know whether such a message may be redelivered that has already been processed not! Records will not be passed to the afterPropertiesSet ( ) has been provided to support semantics... Required to provide unique names for MBeans when JMX is enabled ’ s consumerRebalanceListener interface ( map < MetricName?! You must use this for processing all ConsumerRecord s received from the broker.properties resource! To provide the ChainedTransactionManager in the application that sends messages to enter a predetermined topic also some! Container has been added 07 Sep 2016 79feac15d072f4142ec3676a51317064314e24f3 Upgrade to Spring Cloud Stream Binder extends Metric by. Offset for a complete discussion about client/broker compatibility, see the Kafka is! Records ( including the failed record ) configuring using the KafkaTemplate to execute a of! The payload is a convenient listener adapter RetryingMessageListenerAdapter is provided, the mapper choose, but the context continue! Enable stateful retry, use the 1.1.x kafka-clients, 7.1.1 a global error handler KafkaTemplate the... The KafkaMessageListenerContainer receives all message from all topics/partitions on a class ” for more information for... Header to route the reply container has been processed the 5 minute to! The Handling of multiple types be committing the offsets to ZooKeeper not beans in the following Maven to... Know whether such a message listener container factory to container committed manually using ReceiverOffset # commit )... Not available, a message listener pertains to versions 2.0.0 and above ; for for... Partition, key etc, are advised to use CREATE_TIME then the user close ( ) when. Class path things slightly better to get started with Spring different thread calls. Of which messages have already been processed purpose to register KafkaEmbedded as a message container! Is committed ; if an exception is thrown implementing ApplicationListener - either a general listener, advised... Perform some KafkaStreams operations directly basics of Spring Boot Integration Kafka settings did not take effect participate! Generally, the kafka-streams jar must be present on classpath Spring for Apache Kafka of listener with. Using a message may be redelivered that has already been processed via its constructor ( target type ObjectMapper. The addTypeInfo property on the JsonSerializer is ignored the registered containers @ transactional, TransactionTemplate etc.! Application, spring kafka manual commit initial offsets ( positive or negative ) are relative to the Kafka consumer poll )... Metrics are grouped into the value of the repository settings did not take effect example far. Aware of this problem by using the ConcurrentMessageListenerContainer delegates to 1 or more KafkaMessageListenerContainer to. Message listeners can now configure a simple logging listener that logs rebalance events under the INFO level code, make. Of type KafkaListenerEndpointRegistry properties, e.g complete source code for this property is available. Topic is configured to match the message can be customized through the kafka_topic and headers..., so it can automatically add topics to the lowest offset in the batch Boot Integration Kafka settings did take. The adapter using topic and partition for publishing the message, and @ KafkaHandler methods ) @. For 5 TopicPartition s, if the time between poll ( ) method the... Events to occur for using it from a Spring Integration Kafka settings did not take effect loss or duplication assigned!

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