java.lang.ClassNotFoundException:org.springframework.security.cas.jackson2.CasJackson2Module

[silent-night-no-trace]

Describe the bug
A clear and concise description of what the bug is.

I use springboot to integrate oauth2-authorization-server and use spring-boot-starter-oauth2-authorization-server
But in the project, an error message is displayed saying that cas.jackson2.CasJackson2Module does not exist, but I have not used it

The specific error information is as follows

java.lang.ClassNotFoundException: org.springframework.security.cas.jackson2.CasJackson2Module
at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:641) ~[na:na]
at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
at java.base/java.lang.Class.forName0(Native Method) ~[na:na]
at java.base/java.lang.Class.forName(Class.java:467) ~[na:na]
at org.springframework.util.ClassUtils.forName(ClassUtils.java:304) ~[spring-core-6.1.8.jar:6.1.8]
at org.springframework.security.jackson2.SecurityJackson2Modules.loadAndGetInstance(SecurityJackson2Modules.java:127) ~[spring-security-core-6.3.0.jar:6.3.0]
at org.springframework.security.jackson2.SecurityJackson2Modules.addToModulesList(SecurityJackson2Modules.java:172) ~[spring-security-core-6.3.0.jar:6.3.0]
at org.springframework.security.jackson2.SecurityJackson2Modules.getModules(SecurityJackson2Modules.java:146) ~[spring-security-core-6.3.0.jar:6.3.0]
at org.springframework.security.oauth2.server.authorization.JdbcOAuth2AuthorizationService$OAuth2AuthorizationRowMapper.(JdbcOAuth2AuthorizationService.java:399) ~[spring-security-oauth2-authorization-server-1.3.0.jar:1.3.0]
at org.springframework.security.oauth2.server.authorization.JdbcOAuth2AuthorizationService.(JdbcOAuth2AuthorizationService.java:227) ~[spring-security-oauth2-authorization-server-1.3.0.jar:1.3.0]
at org.springframework.security.oauth2.server.authorization.JdbcOAuth2AuthorizationService.(JdbcOAuth2AuthorizationService.java:211) ~[spring-security-oauth2-authorization-server-1.3.0.jar:1.3.0]
at com.style.auth.config.AuthorizationServerConfig.authorizationService(AuthorizationServerConfig.java:164) ~[classes/:na]
at com.style.auth.config.AuthorizationServerConfig$$SpringCGLIB$$0.CGLIB$authorizationService$4() ~[classes/:na]
at com.style.auth.config.AuthorizationServerConfig$$SpringCGLIB$$FastClass$$1.invoke() ~[classes/:na]
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:258) ~[spring-core-6.1.8.jar:6.1.8]
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:339) ~[spring-context-6.1.8.jar:6.1.8]
at com.style.auth.config.AuthorizationServerConfig$$SpringCGLIB$$0.authorizationService() ~[classes/:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77) ~[na:na]
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:na]
at java.base/java.lang.reflect.Method.invoke(Method.java:568) ~[na:na]
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:140) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:644) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:636) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1337) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1167) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:254) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1443) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1353) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:904) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:782) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:542) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateUsingFactoryMethod(AbstractAutowireCapableBeanFactory.java:1337) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1167) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:562) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:522) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:337) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:335) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:200) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:975) ~[spring-beans-6.1.8.jar:6.1.8]
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:962) ~[spring-context-6.1.8.jar:6.1.8]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:624) ~[spring-context-6.1.8.jar:6.1.8]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.3.0.jar:3.3.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:754) ~[spring-boot-3.3.0.jar:3.3.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:456) ~[spring-boot-3.3.0.jar:3.3.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:335) ~[spring-boot-3.3.0.jar:3.3.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1363) ~[spring-boot-3.3.0.jar:3.3.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1352) ~[spring-boot-3.3.0.jar:3.3.0]
at com.style.auth.AuthServerApplication.main(AuthServerApplication.java:19) ~[classes/:na]

Can I use configuration to avoid loading CasJackson2Module

To Reproduce
Steps to reproduce the behavior.

Expected behavior
A clear and concise description of what you expected to happen.
everything normal work

Sample

A link to a GitHub repository with a minimal, reproducible sample.

Reports that include a sample will take priority over reports that do not.
At times, we may require a sample, so it is good to try and include a sample up front.

[silent-night-no-trace]

dependency

 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-oauth2-authorization-server</artifactId>
      <version>3.3.0</version>
 </dependency>
 <dependency>
      <groupId>org.springframework.boot</groupId>
      <artifactId>spring-boot-starter-oauth2-client</artifactId>
      <version>3.3.0</version>
  </dependency>

[jgrandja]

@silent-night-no-trace The reason you are seeing this DEBUG message is because you are likely using JdbcOAuth2AuthorizationService and/or JdbcRegisteredClientRepository, which calls Spring Security's SecurityJackson2Modules.getModules(classLoader) and attempts to load CasJackson2Module. However, since spring-security-cas is not in the classpath as a dependency, you see this DEBUG message.

This is expected behaviour and is not an error. It's a DEBUG message so you can ignore it.