spring-rest-docs api-docs endpoint 500 error using Spring Boot: 2.4.0-M2

[springroll12]

Describe the bug

/v3/api-docs endpoint throws 500 error when using spring-data-rest and springdoc-openapi-data-rest. The following exception is thrown:

GET "/test-api/v3/api-docs", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
2020-09-01 18:46:41.195 TRACE 6 --- [nio-8080-exec-3] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped to org.springdoc.webmvc.api.OpenApiResource#openapiJson(HttpServletRequest, String)
2020-09-01 18:46:41.196 TRACE 6 --- [nio-8080-exec-3] .w.s.m.m.a.ServletInvocableHandlerMethod : Arguments: [org.springframework.web.filter.ForwardedHeaderFilter$ForwardedHeaderExtractingRequest@74262574, /v3/api-docs]
2020-09-01 18:46:41.286 TRACE 6 --- [nio-8080-exec-3] o.s.web.servlet.DispatcherServlet        : Failed to complete request

org.springframework.web.util.NestedServletException: Handler dispatch failed; nested exception is java.lang.IncompatibleClassChangeError: Found interface org.springframework.data.rest.webmvc.support.DelegatingHandlerMapping, but class was expected
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1077) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:962) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.37.jar!/:4.0.FR]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.37.jar!/:4.0.FR]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.web.filter.ForwardedHeaderFilter.doFilterInternal(ForwardedHeaderFilter.java:160) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:339) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:126) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:90) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:118) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:137) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:111) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:158) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:63) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:116) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.csrf.CsrfFilter.doFilterInternal(CsrfFilter.java:117) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.header.HeaderWriterFilter.doHeadersAfter(HeaderWriterFilter.java:92) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.header.HeaderWriterFilter.doFilterInternal(HeaderWriterFilter.java:77) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:353) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:223) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:184) ~[spring-security-web-5.4.0-RC1.jar!/:5.4.0-RC1]
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:358) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:271) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:93) ~[spring-boot-actuator-2.4.0-M2.jar!/:2.4.0-M2]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1589) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[na:na]
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[na:na]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.37.jar!/:9.0.37]
	at java.base/java.lang.Thread.run(Thread.java:834) ~[na:na]
Caused by: java.lang.IncompatibleClassChangeError: Found interface org.springframework.data.rest.webmvc.support.DelegatingHandlerMapping, but class was expected
	at org.springdoc.data.rest.SpringRepositoryRestResourceProvider.getRouterOperations(SpringRepositoryRestResourceProvider.java:145) ~[springdoc-openapi-data-rest-1.4.6.jar!/:1.4.6]
	at org.springdoc.webmvc.api.OpenApiResource.getPaths(OpenApiResource.java:231) ~[springdoc-openapi-webmvc-core-1.4.6.jar!/:1.4.6]
	at org.springdoc.api.AbstractOpenApiResource.getOpenApi(AbstractOpenApiResource.java:265) ~[springdoc-openapi-common-1.4.6.jar!/:1.4.6]
	at org.springdoc.webmvc.api.OpenApiResource.openapiJson(OpenApiResource.java:179) ~[springdoc-openapi-webmvc-core-1.4.6.jar!/:1.4.6]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:na]
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[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:566) ~[na:na]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:888) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:802) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1062) ~[spring-webmvc-5.3.0-M2.jar!/:5.3.0-M2]
	... 81 common frames omitted

To Reproduce
Steps to reproduce the behavior:

Spring Boot: 2.4.0-M2 (spring-data-rest, spring-security)
springdoc-openapi-ui: 1.4.5 or 1.4.6
springdoc-openapi-data-rest: 1.4.5 or 1.4.6
openjdk: 11

1. Remove all springdoc configuration except springdoc.version
2. Rebuild application and navigate to /v3/api-docs
3. Observe 500 error

Expected behavior
OpenAPI yaml is shown

Screenshots

Additional context

Note that removing the springdoc-openapi-data-rest dependency resolves the exception, however no endpoints are shown in the resulting openapi configuration.

[bnasslahsen]

@springroll12,

FYI, springdoc-openapi v1.4.6 is built with spring-boot 2.3.2.RELEASE.
Just reproduced your error using spring-boot v2.4.0-M2.

There has been a change on spring-data between 2.3.3.RELEASE and 2.4.0-M2.

The following interface DelegatingHandlerMapping, has been deprecated and changed into class. ..