Major This issue can be reproduced with the rest-openapi example from https://github.com/jboss-fuse/camel-spring-boot-examples/tree/camel-spring-boot-examples-4.0.0-M3-branch :
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.0.6) 2023-07-24T11:02:19.481+02:00 INFO 452274 --- [ main] o.a.c.example.springboot.Application : Starting Application using Java 17.0.5 with PID 452274 (/git/camel-spring-boot-examples/rest-openapi/target/classes started by avano in /git/camel-spring-boot-examples/rest-openapi) 2023-07-24T11:02:19.483+02:00 INFO 452274 --- [ main] o.a.c.example.springboot.Application : No active profile set, falling back to 1 default profile: "default" 2023-07-24T11:02:19.890+02:00 WARN 452274 --- [ main] io.undertow.websockets.jsr : UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used 2023-07-24T11:02:19.897+02:00 INFO 452274 --- [ main] io.undertow.servlet : Initializing Spring embedded WebApplicationContext 2023-07-24T11:02:19.898+02:00 INFO 452274 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 391 ms 2023-07-24T11:02:20.213+02:00 INFO 452274 --- [ main] o.a.c.c.s.CamelHttpTransportServlet : Initialized CamelHttpTransportServlet[name=CamelServlet, contextPath=] 2023-07-24T11:02:20.215+02:00 INFO 452274 --- [ main] io.undertow : starting server: Undertow - 2.3.5.Final-redhat-00001 2023-07-24T11:02:20.218+02:00 INFO 452274 --- [ main] org.xnio : XNIO version 3.8.8.Final 2023-07-24T11:02:20.222+02:00 INFO 452274 --- [ main] org.xnio.nio : XNIO NIO Implementation Version 3.8.8.Final 2023-07-24T11:02:20.256+02:00 INFO 452274 --- [ main] org.jboss.threads : JBoss Threads version 3.5.0.Final 2023-07-24T11:02:20.273+02:00 INFO 452274 --- [ main] o.s.b.w.e.undertow.UndertowWebServer : Undertow started on port(s) 8080 (http) 2023-07-24T11:02:20.395+02:00 WARN 452274 --- [ main] i.s.v3.parser.util.DeserializationUtils : Error snake-parsing yaml content java.lang.NoSuchMethodError: org.yaml.snakeyaml.constructor.SafeConstructor: method 'void <init>()' not found at io.swagger.v3.parser.util.DeserializationUtils$CustomSnakeYamlConstructor.<init>(DeserializationUtils.java:393) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at io.swagger.v3.parser.util.DeserializationUtils.readYamlTree(DeserializationUtils.java:207) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at io.swagger.v3.parser.util.DeserializationUtils.deserializeIntoTree(DeserializationUtils.java:143) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at io.swagger.v3.parser.OpenAPIV3Parser.readContents(OpenAPIV3Parser.java:168) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at io.swagger.v3.parser.OpenAPIV3Parser.readContents(OpenAPIV3Parser.java:107) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at io.swagger.v3.parser.OpenAPIV3Parser.readContents(OpenAPIV3Parser.java:151) ~[swagger-parser-v3-2.1.10.jar:2.1.10] at org.apache.camel.springboot.openapi.OpenApiAutoConfiguration.createOpenAPI(OpenApiAutoConfiguration.java:154) ~[camel-openapi-java-starter-4.0.0.M3-redhat-00014.jar:4.0.0.M3-redhat-00014] at org.apache.camel.springboot.openapi.OpenApiAutoConfiguration$1.beforeApplicationStart(OpenApiAutoConfiguration.java:79) ~[camel-openapi-java-starter-4.0.0.M3-redhat-00014.jar:4.0.0.M3-redhat-00014] at org.apache.camel.spring.boot.CamelSpringBootApplicationListener.onApplicationEvent(CamelSpringBootApplicationListener.java:111) ~[camel-spring-boot-4.0.0.M3-redhat-00014.jar:4.0.0.M3-redhat-00014] at org.apache.camel.spring.boot.CamelSpringBootApplicationListener.onApplicationEvent(CamelSpringBootApplicationListener.java:59) ~[camel-spring-boot-4.0.0.M3-redhat-00014.jar:4.0.0.M3-redhat-00014] at org.springframework.context.event.SimpleApplicationEventMulticaster.doInvokeListener(SimpleApplicationEventMulticaster.java:176) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.event.SimpleApplicationEventMulticaster.invokeListener(SimpleApplicationEventMulticaster.java:169) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.event.SimpleApplicationEventMulticaster.multicastEvent(SimpleApplicationEventMulticaster.java:143) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:413) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.support.AbstractApplicationContext.publishEvent(AbstractApplicationContext.java:370) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.support.AbstractApplicationContext.finishRefresh(AbstractApplicationContext.java:937) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:587) ~[spring-context-6.0.8.jar:6.0.8] at org.springframework.boot.web.servlet.context.ServletWebServerApplicationContext.refresh(ServletWebServerApplicationContext.java:146) ~[spring-boot-3.0.6.jar:3.0.6] at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:732) ~[spring-boot-3.0.6.jar:3.0.6] at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:434) ~[spring-boot-3.0.6.jar:3.0.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:310) ~[spring-boot-3.0.6.jar:3.0.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1304) ~[spring-boot-3.0.6.jar:3.0.6] at org.springframework.boot.SpringApplication.run(SpringApplication.java:1293) ~[spring-boot-3.0.6.jar:3.0.6] at org.apache.camel.example.springboot.Application.main(Application.java:30) ~[classes/:na] 2023-07-24T11:02:20.415+02:00 INFO 452274 --- [ main] o.a.c.s.o.OpenApiAutoConfiguration : OpenAPI (3.0.2) created from Camel Rest-DSL v1.0.0 - User API 2023-07-24T11:02:20.505+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Apache Camel 4.0.0.M3-redhat-00001 (MyCamel) is starting 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Routes startup (started:5) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route2 (direct://update-user) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route1 (rest-api:///api-doc) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route3 (rest://get:/users) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route4 (rest://get:/users:/%7Bid%7D) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route5 (rest://put:/users:/%7Bid%7D) 2023-07-24T11:02:20.513+02:00 INFO 452274 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Apache Camel 4.0.0.M3-redhat-00001 (MyCamel) started in 7ms (build:0ms init:0ms start:7ms) 2023-07-24T11:02:20.515+02:00 INFO 452274 --- [ main] o.a.c.example.springboot.Application : Started Application in 1.19 seconds (process running for 1.328)
however, the api doc can be accessed at http://localhost:8080/api/api-doc normally.
per https://github.com/swagger-api/swagger-parser/issues/1899 it should be enough to bump the dependency version of swagger-parser-v3 to at least 2.1.13 (currently the example uses 2.1.10)
When adding the 2.1.16 version to the dependency management for the example, it works ok:
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v3.0.6) 2023-07-24T11:05:58.120+02:00 INFO 461599 --- [ main] o.a.c.example.springboot.Application : Starting Application using Java 17.0.5 with PID 461599 (/git/camel-spring-boot-examples/rest-openapi/target/classes started by avano in /git/camel-spring-boot-examples/rest-openapi) 2023-07-24T11:05:58.122+02:00 INFO 461599 --- [ main] o.a.c.example.springboot.Application : No active profile set, falling back to 1 default profile: "default" 2023-07-24T11:05:58.527+02:00 WARN 461599 --- [ main] io.undertow.websockets.jsr : UT026010: Buffer pool was not set on WebSocketDeploymentInfo, the default pool will be used 2023-07-24T11:05:58.535+02:00 INFO 461599 --- [ main] io.undertow.servlet : Initializing Spring embedded WebApplicationContext 2023-07-24T11:05:58.536+02:00 INFO 461599 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 391 ms 2023-07-24T11:05:58.853+02:00 INFO 461599 --- [ main] o.a.c.c.s.CamelHttpTransportServlet : Initialized CamelHttpTransportServlet[name=CamelServlet, contextPath=] 2023-07-24T11:05:58.855+02:00 INFO 461599 --- [ main] io.undertow : starting server: Undertow - 2.3.5.Final-redhat-00001 2023-07-24T11:05:58.859+02:00 INFO 461599 --- [ main] org.xnio : XNIO version 3.8.8.Final 2023-07-24T11:05:58.864+02:00 INFO 461599 --- [ main] org.xnio.nio : XNIO NIO Implementation Version 3.8.8.Final 2023-07-24T11:05:58.895+02:00 INFO 461599 --- [ main] org.jboss.threads : JBoss Threads version 3.5.0.Final 2023-07-24T11:05:58.913+02:00 INFO 461599 --- [ main] o.s.b.w.e.undertow.UndertowWebServer : Undertow started on port(s) 8080 (http) 2023-07-24T11:05:59.060+02:00 INFO 461599 --- [ main] o.a.c.s.o.OpenApiAutoConfiguration : OpenAPI (3.0.2) created from Camel Rest-DSL v1.0.0 - User API 2023-07-24T11:05:59.153+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Apache Camel 4.0.0.M3-redhat-00001 (MyCamel) is starting 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Routes startup (started:5) 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route2 (direct://update-user) 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route1 (rest-api:///api-doc) 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route3 (rest://get:/users) 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route4 (rest://get:/users:/%7Bid%7D) 2023-07-24T11:05:59.160+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Started route5 (rest://put:/users:/%7Bid%7D) 2023-07-24T11:05:59.161+02:00 INFO 461599 --- [ main] o.a.c.impl.engine.AbstractCamelContext : Apache Camel 4.0.0.M3-redhat-00001 (MyCamel) started in 7ms (build:0ms init:0ms start:7ms) 2023-07-24T11:05:59.162+02:00 INFO 461599 --- [ main] o.a.c.example.springboot.Application : Started Application in 1.202 seconds (process running for 1.339)
