SpringBoot2.6,在有spring-boot-starter-actuator依赖的情况下报错，2.5.7正常启动

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-11-25 16:04:20.381 ERROR 20252 --- [ main] o.s.boot.SpringApplication : Application run failed

org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:181) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.context.support.DefaultLifecycleProcessor.access$200(DefaultLifecycleProcessor.java:54) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.context.support.DefaultLifecycleProcessor$LifecycleGroup.start(DefaultLifecycleProcessor.java:356) ~[spring-context-5.3.13.jar:5.3.13]
at java.lang.Iterable.forEach(Iterable.java:75) ~[na:1.8.0_202]
at org.springframework.context.support.DefaultLifecycleProcessor.startBeans(DefaultLifecycleProcessor.java:155) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.context.support.DefaultLifecycleProcessor.onRefresh(DefaultLifecycleProcessor.java:123) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:935) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:586) ~[spring-context-5.3.13.jar:5.3.13]
at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:145) ~[spring-boot-2.6.0.jar:2.6.0]
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) [spring-boot-2.6.0.jar:2.6.0]
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) [spring-boot-2.6.0.jar:2.6.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) [spring-boot-2.6.0.jar:2.6.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) [spring-boot-2.6.0.jar:2.6.0]
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) [spring-boot-2.6.0.jar:2.6.0]
at com.wiley.TestApplication.main(TestApplication.java:20) [classes/:na]
Caused by: java.lang.NullPointerException: null
at springfox.documentation.spring.web.WebMvcPatternsRequestConditionWrapper.getPatterns(WebMvcPatternsRequestConditionWrapper.java:56) ~[springfox-spring-webmvc-2.10.5.jar:null]
at springfox.documentation.RequestHandler.sortedPaths(RequestHandler.java:112) ~[springfox-core-2.10.5.jar:null]
at springfox.documentation.spi.service.contexts.Orderings.lambda$byPatternsCondition$3(Orderings.java:89) ~[springfox-spi-2.10.5.jar:null]
at java.util.Comparator.lambda$comparing$77a9974f$1(Comparator.java:469) ~[na:1.8.0_202]
at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355) ~[na:1.8.0_202]
at java.util.TimSort.sort(TimSort.java:220) ~[na:1.8.0_202]
at java.util.Arrays.sort(Arrays.java:1512) ~[na:1.8.0_202]
at java.util.ArrayList.sort(ArrayList.java:1462) ~[na:1.8.0_202]
at java.util.stream.SortedOps$RefSortingSink.end(SortedOps.java:387) ~[na:1.8.0_202]
at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_202]
at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_202]
at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_202]
at java.util.stream.Sink$ChainedReference.end(Sink.java:258) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_202]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_202]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_202]
at springfox.documentation.spring.web.plugins.WebMvcRequestHandlerProvider.requestHandlers(WebMvcRequestHandlerProvider.java:76) ~[springfox-spring-webmvc-2.10.5.jar:null]
at java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193) ~[na:1.8.0_202]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1382) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471) ~[na:1.8.0_202]
at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708) ~[na:1.8.0_202]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_202]
at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499) ~[na:1.8.0_202]
at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.defaultContextBuilder(AbstractDocumentationPluginsBootstrapper.java:108) ~[springfox-spring-web-2.10.5.jar:null]
at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.buildContext(AbstractDocumentationPluginsBootstrapper.java:92) ~[springfox-spring-web-2.10.5.jar:null]
at springfox.documentation.spring.web.plugins.AbstractDocumentationPluginsBootstrapper.bootstrapDocumentationPlugins(AbstractDocumentationPluginsBootstrapper.java:83) ~[springfox-spring-web-2.10.5.jar:null]
at springfox.documentation.spring.web.plugins.DocumentationPluginsBootstrapper.start(DocumentationPluginsBootstrapper.java:94) ~[springfox-spring-web-2.10.5.jar:null]
at org.springframework.context.support.DefaultLifecycleProcessor.doStart(DefaultLifecycleProcessor.java:178) ~[spring-context-5.3.13.jar:5.3.13]
... 14 common frames omitted

与目标 VM 断开连接, 地址为: ''127.0.0.1:58737'，传输: '套接字''

单独去掉spring-boot-starter-actuator依赖或者Knife4jConfiguration都能正常启动
springboot版本切换到2.5.7也没问题

除了回退及BeanPostProcessor，还有其他比较好的方案吗

在补充下，已经添加 spring.mvc.pathmatch.matching-strategy=ant-path-matcher 配置

再加上这个配置

@Bean
	public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {
	    return new BeanPostProcessor() {
	
	        @Override
	        public Object postProcessAfterInitialization(Object bean, String beanName) throws BeansException {
	            if (bean instanceof WebMvcRequestHandlerProvider || bean instanceof WebFluxRequestHandlerProvider) {
	                customizeSpringfoxHandlerMappings(getHandlerMappings(bean));
	            }
	            return bean;
	        }
	
	        private <T extends RequestMappingInfoHandlerMapping> void customizeSpringfoxHandlerMappings(List<T> mappings) {
	            mappings.removeIf(mapping -> mapping.getPatternParser() != null);
	        }
	
	        @SuppressWarnings("unchecked")
	        private List<RequestMappingInfoHandlerMapping> getHandlerMappings(Object bean) {
	            try {
	                Field field = ReflectionUtils.findField(bean.getClass(), "handlerMappings");
	                field.setAccessible(true);
	                return (List<RequestMappingInfoHandlerMapping>) field.get(bean);
	            } catch (IllegalArgumentException | IllegalAccessException e) {
	                throw new IllegalStateException(e);
	            }
	        }
	    };
	}

请问加上这个@Bean后，Knife4j页面可以出来，api能显示吗? 我的api接口显示不出来呢
public static BeanPostProcessor springfoxHandlerProviderBeanPostProcessor() {

同样，SpringBoot2.6.4+knife4j-micro-spring-boot-starter2.0.9，加入了springfoxHandlerProviderBeanPostProcessor后程序可以启动，但是自定义的API信息都没有了，请问你解决了吗？

后置处理器再加上这个配置spring.mvc.pathmatch.matching-strategy=ant-path-matcher可以的，亲测

这个可以有，请问出处在哪？

你解决了吗,我这边也遇到了

临时切回2.5.7了

添加spring.mvc.pathmatch.matching-strategy=ant-path-matcher在springboot2.6.0上,对于底层的springfox组件就是正常的,你一定在其他地方配置了额外的配置.

专门新起的demo测试的，除了knife4j和spring-boot-starter-actuator啥都没有
spring.mvc.pathmatch.matching-strategy=ant-path-matcher配置也加了。不然直接报错的

我感觉你demo写的有问题,我启动个新的没有问题.

不加actuator就没问题加了就死掉

请问spring-boot-starter-actuator加上的话最终解决办法有？

你们这生产环境都直接升级boot版本的啊。。。

生产环境上之前本地测试出线的

刚测试了下2.6.1问题还在

输入图片说明
3.0.0的版本使用的是spring-webmvc 5.2.x，等作者升级到5.3.x吧，升级之后就可以使用上边的方法了。

2022年08月：
作者估计凉了，想研究研究的可以看下这里：https://gitee.com/missfmaster/springfox3.git
spring boot 2.6.8
可以启动
可以访问

对的，我调试源代码也是找到这里，actuator这边生成的mapping的pathPatternCondition不为空patternCondition为空，正常业务mvc的mapping是反过来的，所以调用老哥截图的这个方法刚好适配。想找角度重写他这个方法，但是看了下方法调用有点深，可行性不高，就暂时干掉了actuator。

请问除了降级springboot版本之外，有没有找到合适的解决办法呢

从github找的一个答案，注入一个bean

   /**
    * 解决springboot升级到2.6.x之后，knife4j报错
    *
    * @param webEndpointsSupplier        the web endpoints supplier
    * @param servletEndpointsSupplier    the servlet endpoints supplier
    * @param controllerEndpointsSupplier the controller endpoints supplier
    * @param endpointMediaTypes          the endpoint media types
    * @param corsProperties              the cors properties
    * @param webEndpointProperties       the web endpoint properties
    * @param environment                 the environment
    * @return the web mvc endpoint handler mapping
    */
    @Bean
    public WebMvcEndpointHandlerMapping webEndpointServletHandlerMapping(
    WebEndpointsSupplier webEndpointsSupplier, ServletEndpointsSupplier servletEndpointsSupplier,
    ControllerEndpointsSupplier controllerEndpointsSupplier, EndpointMediaTypes endpointMediaTypes,
    CorsEndpointProperties corsProperties, WebEndpointProperties webEndpointProperties,
    Environment environment) {
    List<ExposableEndpoint<?>> allEndpoints = new ArrayList<>();
    Collection<ExposableWebEndpoint> webEndpoints = webEndpointsSupplier.getEndpoints();
    allEndpoints.addAll(webEndpoints);
    allEndpoints.addAll(servletEndpointsSupplier.getEndpoints());
    allEndpoints.addAll(controllerEndpointsSupplier.getEndpoints());
    String basePath = webEndpointProperties.getBasePath();
    EndpointMapping endpointMapping = new EndpointMapping(basePath);
    boolean shouldRegisterLinksMapping = shouldRegisterLinksMapping(webEndpointProperties,
      environment, basePath);
    return new WebMvcEndpointHandlerMapping(endpointMapping, webEndpoints, endpointMediaTypes,
      corsProperties.toCorsConfiguration(), new EndpointLinksResolver(allEndpoints, basePath),
      shouldRegisterLinksMapping, null);
    }
    
    /**
    * shouldRegisterLinksMapping
    * @param webEndpointProperties webEndpointProperties
    * @param environment environment
    * @param basePath /
    * @return boolean
    */
    private boolean shouldRegisterLinksMapping(WebEndpointProperties webEndpointProperties,
    Environment environment, String basePath) {
    return webEndpointProperties.getDiscovery().isEnabled() && (StringUtils.hasText(basePath)
      || ManagementPortType.get(environment).equals(ManagementPortType.DIFFERENT));
    }

加上这个解决了，GitHub的地址能分享一下吗

我的是springboot2.6.9+knife4j2.0.9+spring-boot-starter-actuator，加上你这个bean，可以正常启动了

感谢

这段代码来源于org.springframework.boot.actuate.autoconfigure.endpoint.web.servlet.WebMvcEndpointManagementContextConfiguration,然后加上之后虽然不报错了，但是没法更改management.server.port，就很奇怪

启动成功但是方为doc.html他页面出现一下异常：
java.lang.NullPointerException: null
at springfox.documentation.swagger2.mappers.RequestParameterMapper.bodyParameter(RequestParameterMapper.java:264) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.RequestParameterMapper.mapParameter(RequestParameterMapper.java:149) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.beforeMappingOperations(ServiceModelToSwagger2Mapper.java:125) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2MapperImpl.mapOperation(ServiceModelToSwagger2MapperImpl.java:109) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.mapOperations(ServiceModelToSwagger2Mapper.java:270) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.lambda$mapApiListings$2(ServiceModelToSwagger2Mapper.java:258) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:184) ~[na:1.8.0_311]
at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(ArrayList.java:1384) ~[na:1.8.0_311]
at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580) ~[na:1.8.0_311]
at java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:270) ~[na:1.8.0_311]
at java.util.TreeMap$ValueSpliterator.forEachRemaining(TreeMap.java:2897) ~[na:1.8.0_311]
at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:482) ~[na:1.8.0_311]
at java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:472) ~[na:1.8.0_311]
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(ForEachOps.java:151) ~[na:1.8.0_311]
at java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(ForEachOps.java:174) ~[na:1.8.0_311]
at java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234) ~[na:1.8.0_311]
at java.util.stream.ReferencePipeline.forEachOrdered(ReferencePipeline.java:423) ~[na:1.8.0_311]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2Mapper.mapApiListings(ServiceModelToSwagger2Mapper.java:253) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.mappers.ServiceModelToSwagger2MapperImpl.mapDocumentation(ServiceModelToSwagger2MapperImpl.java:48) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at springfox.documentation.swagger2.web.Swagger2ControllerWebMvc.getDocumentation(Swagger2ControllerWebMvc.java:99) ~[springfox-swagger2-3.0.0.jar:3.0.0]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_311]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_311]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_311]
at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_311]
at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:205) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:150) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:117) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:895) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:808) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1067) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:963) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.3.15.jar:5.3.15]
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.3.15.jar:5.3.15]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:655) ~[tomcat-embed-core-9.0.56.jar:4.0.FR]
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.3.15.jar:5.3.15]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:764) ~[tomcat-embed-core-9.0.56.jar:4.0.FR]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.springframework.web.filter.CorsFilter.doFilterInternal(CorsFilter.java:91) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.3.15.jar:5.3.15]
at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:117) ~[spring-web-5.3.15.jar:5.3.15]
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:197) ~[tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:540) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:135) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:357) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:382) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:895) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1732) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1191) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:659) [tomcat-embed-core-9.0.56.jar:9.0.56]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.56.jar:9.0.56]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_311]

我用的springboot2.6.2+swagger2 2.9.2+spring-boot-starter-actuator，碰到了这个异常。actuator是后添加的，添加后spring.mvc.pathmatch.matching-strategy=ant-path-matcher的配置就跟失效了一样。使用了楼上的注入WebMvcEndpointHandlerMapping 的bean后问题解决。在次标识感谢

issues真是开源软件宝贵的财富

这个问题有没有办法在knife4j的代码里解决，而不是使用者加这个，因为我在使用4.0的项目结合SpringBoot2.7.X时也遇到了这个问题，一开始提示lettuce空指针，后面在摸到了这里，实在是太蛋疼了

+1，但我是2.7.x

我用的springboot2.6.3 + knife4j3.0.3 +spring-boot-starter-actuator，碰到了这个异常。
ERROR org.springframework.boot.SpringApplication - Application run failed
org.springframework.context.ApplicationContextException: Failed to start bean 'documentationPluginsBootstrapper'; nested exception is java.lang.NullPointerException
actuator是后添加的，添加后spring.mvc.pathmatch.matching-strategy=ant-path-matcher的配置就跟失效了一样。
使用了楼上的注入WebMvcEndpointHandlerMapping 的bean后问题解决。在次标识感谢

springboot2.7.12+actuator+knife4j2.10.5，也是加ant-path-matcher没用。但是加个这个配置就可以了：

management.server.port=8090

8090就是健康检查的端口号（不加的话默认和server.port一样，就会报错）
而且也不需要加ant-path-matcher。

GVP 萧明 / knife4j

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GVP萧明 / knife4j

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