java

Project Reactor duplicate subscription error

reactor\.core\.Exceptions.*Duplicate.*Subscription

Fixes

1.Use .cache() or .share() for hot publishers subscribed multiple times
2.Ensure each subscriber gets its own subscription (cold publisher)
3.Check for accidental multiple subscribe calls in WebFlux chain

spring-bootreactorwebflux

Related Errors

Spring Boot bean not found in application context

NoSuchBeanDefinitionException.*No qualifying bean of type

•Add @Component/@Service/@Repository annotation to the class
•Ensure the package is scanned: check @ComponentScan or @SpringBootApplication basePackages

Spring circular dependency during bean creation

BeanCurrentlyInCreationException.*Requested bean is currently in creation

•Use @Lazy annotation on one of the circular dependencies
•Refactor to break the circular dependency with an event or interface

Spring Boot unsatisfied dependency injection

UnsatisfiedDependencyException.*Error creating bean with name

•Verify the required bean exists and is properly annotated
•Use @Qualifier to disambiguate when multiple beans of same type exist