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java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks after upgrading to Spring Boot Admin 2.4.0 on Spring Boot 2.3.8.RELEASE

See original GitHub issue

I have a project on Spring Boot 2.3.8.RELEASE that works ok with Spring Boot Admin 2.3.1.

When I upgrade Spring Boot Admin to version 2.4.0, I get this error:

2021-02-22 10:50:22.799  WARN [           main] o.s.w.c.s.GenericWebApplicationContext   : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'endpointDetector' defined in com.bol.axexss.order.SpringBootAdminApplication: Unsatisfied dependency expressed through method 'endpointDetector' parameter 0; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'instanceRepository' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.class]: Unsatisfied dependency expressed through method 'instanceRepository' parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'eventStore' defined in class path resource [de/codecentric/boot/admin/server/config/AdminServerAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [de.codecentric.boot.admin.server.eventstore.InMemoryEventStore]: Factory method 'eventStore' threw exception; nested exception is java.lang.NoClassDefFoundError: reactor/core/publisher/Sinks

It seems the reason for this is that de.codecentric.boot.admin.server.eventstore.InstanceEventPublisher imports reactor.core.publisher.Sinks, but this class does not exist in the version 3.3.13.RELEASE of reactor-core as used by Spring Boot 2.3.8.RELEASE. It seems reactor.core.publisher.Sinks was introduced in reactor-core 3.4.0.

Issue Analytics

State:
Created 3 years ago
Comments:6 (1 by maintainers)

Top GitHub Comments

1reaction

joshistecommented, Feb 22, 2021

please use spring boot 2.4.x for sba 2.4.x

0reactions

marcellodesalescommented, Sep 19, 2021

@breun I just did the same thing… I just had to re-write an entire app from scratch using SpringBoot 2.5.4… Everything is working as expected now…

@erikpetzold I tried to match it but the UI had errors, I couldn’t get authentication to work on that version… I did spend a good couple of hours since I sent that message and I think I’m on 5hrs working on the latest version without any hiccups… Thank you for the suggestion…