v4.1.0

⭐ New Features

• make the method setBackOffFunction work for the batch processing as well #4455

🐞 Bug Fixes

• Require exact package match for trusted header types #4496
• Harden retry topic headers decoding in Spring Kafka #4493
• Fix unbounded cache in DelegatingDeserializer #4489
• @RetryableTopic: built-in DLT logging handler fails with "No Acknowledgment available" on 4.0 (works on 3.3.x) #4468
• Suspend @KafkaListener re-delivers a failing record without bound after DefaultErrorHandler retries are exhausted #4465
• KafkaMessageListenerContainer for ackMode=COUNT_TIME doesn't check ackTime #4444
• Different behavior for value serializer mappings for different classloaders #4442
• DefaultAfterRollbackProcessor for batch-listeners consuming ConsumerRecords doesn't seek consumer #4439
• NPE when properties are not defined for StreamsBuilderFactoryBean #4434
• Incorrect key, value, and headers passed to KafkaStreamsDeadLetterDestinationResolver #4430
• Inconsistent handling of non-string values in Properties argument passed to DefaultConsumerFactory::createKafkaConsumer #4384

📔 Documentation

• BatchListenerFailedException silently commits offsets for unprocessed records in BatchMessageListener #4436
• Polish README.md and CONTRIBUTING.adoc #4184

🔨 Dependency Upgrades

• Bump io.projectreactor:reactor-bom from 2025.0.5 to 2025.0.6 #4485
• Bump org.springframework:spring-framework-bom from 7.0.7 to 7.0.8 #4481
• Bump io.micrometer:micrometer-tracing-bom from 1.7.0-SNAPSHOT to 1.7.0 #4480
• Bump com.fasterxml.jackson:jackson-bom from 2.21.3 to 2.21.4 #4458
• Bump tools.jackson:jackson-bom from 3.1.3 to 3.1.4 #4457
• Bump kafkaVersion from 4.2.0 to 4.2.1 #4456
• Bump org.slf4j:slf4j-api from 2.0.17 to 2.0.18 #4445
• Bump tools.jackson:jackson-bom from 3.1.2 to 3.1.3 #4438
• Bump com.fasterxml.jackson:jackson-bom from 2.21.2 to 2.21.3 #4437
• Bump kotlinVersion from 2.3.20 to 2.3.21 #4426

❤️ Contributors

Thank you to all the contributors who worked on this release:

@LeosBitto and @ngocnhan-tran1996