Multiple Spring ecosystem projects released their first release candidates during the week of April 20th, 2026. Spring Boot 4.1.0-RC1 adds OpenTelemetry Protocol SDK exporter support and improved transaction management. Spring Security 7.1.0-RC1 introduces a new anyOf() method and PreFlightRequestFilter support. Spring Integration 7.1.0-RC1 refactors RedisLockRegistry to leverage Redis 8.4+ native commands. Spring Modulith 2.1.0-RC1 adds a new @ModuleSlicing annotation and improved JobRunr transaction handling. Spring AMQP 4.1.0-RC1 adds setStopListenerOnFatal() and aligns @EnableAmqp with @EnableRabbit. Spring for Apache Kafka 4.1.0-RC1 introduces a ShareAckMode enum and AcknowledgementCommitCallback support. Spring LDAP 4.1.0-RC1 removes JUnit 4 constraints and refactors LdapClient. Spring Vault 4.1.0-RC1 adds support for HashiCorp Vault 2.0.
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