Hi Team, I see this issue was closed without any solution because of lack of data. we are also facing this issue and we are stuck in our development. Currently, we are upgrading and fixing vulnerabilities in our application.

We are using below plugin:

ch.qos.logback logback-core 1.3.12 Error : org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'logbackConfigurer' defined in class path resource [com/db/esles/configuration/LogbackConfig.class]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: ch/qos/logback/core/joran/action/AbstractEventEvaluatorAction

As maven is not able to find this class, we are not sure how can we overcome this issue.

Comment From: bclozel

Duplicates #37110

There is no issue with Spring Boot as far as we know. We can reopen this issue if you provide a sample application that reproduces the problem. Thanks!

Comment From: prabal-saxena-db

Uploading logback-classic-core-issue.zip…

Comment From: bclozel

@prabal-saxena-db this link doesn't work.

Comment From: prabal-saxena-db

Hi @bclozel, I am providing a different link in some time, this is an upload from my org email address

Comment From: Prabal-saxena

Hi @bclozel, could you please try access below project

https://github.com/Prabal-saxena/logbackClassicIssue.git

Comment From: wilkinsona

You are trying to use Logback 1.3 with Spring Boot 2.7 which is not supported. Spring Boot 2.7 requires Logback 1.2. Also, please note that OSS support for Spring Boot 2.7.x has ended. You could upgrade to Spring Boot 3.1.x or later.