spring-bootspringdocspringdoc-openapi-ui

SpringDoc 2.8.0: Failed to introspect Class [SwaggerConfig] - IllegalStateException

After updating SpringDoc to version 2.8.0, my Spring Boot application fails to start with the following error:

Caused by: java.lang.IllegalStateException: Failed to introspect Class [org.springdoc.webmvc.ui.SwaggerConfig] 
from ClassLoader [org.springframework.boot.loader.launch.LaunchedClassLoader]

Dependency in pom.xml:

<dependency>
    <groupId>org.springdoc</groupId>
    <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId>
    <version>2.8.0</version>
</dependency>

Has anyone faced this issue? How can I resolve it?

Solution

  • When checking the SpringDoc compatibility matrix https://springdoc.org/#what-is-the-compatibility-matrix-of-springdoc-openapi-with-spring-boot

    I noticed that Springdoc 2.8.0 requires Spring Boot 3.4.x

    I resolved the issue by downgrading SpringDoc to version 2.3.x, which is compatible with my current Spring Boot version.