Spring controller is not supporting ServerHttpRequest

Question

I am using ServerHttpRequest as the request parameter in my Rest Controller. But in the response I'm getting error as "No primary or default constructor found for interface org.springframework.http.server.reactive.ServerHttpRequest".

I found one similar question, but no luck.

Rest Controller

@GetMapping(path = "/**")
public Mono &ltResponseEntity&lt String&gt&gt clientRequests(ServerHttpRequest request) {
    Mono&ltResponseEntity&ltString&gt&gt jsonOp =  restServices.getApiResponse();
    return jsonOp;
}

Log

SEVERE: Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is java.lang.IllegalStateException: No primary or default constructor found for interface org.springframework.http.server.reactive.ServerHttpRequest] with root cause
java.lang.NoSuchMethodException: org.springframework.http.server.reactive.ServerHttpRequest.()
    at java.lang.Class.getConstructor0(Class.java:3082)
    at java.lang.Class.getDeclaredConstructor(Class.java:2178)
    at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.createAttribute(ModelAttributeMethodProcessor.java:216)
    at org.springframework.web.servlet.mvc.method.annotation.ServletModelAttributeMethodProcessor.createAttribute(ServletModelAttributeMethodProcessor.java:84)
    at org.springframework.web.method.annotation.ModelAttributeMethodProcessor.resolveArgument(ModelAttributeMethodProcessor.java:139)
    at org.springframework.web.method.support.HandlerMethodArgumentResolverComposite.resolveArgument(HandlerMethodArgumentResolverComposite.java:126)
    at org.springframework.web.method.support.InvocableHandlerMethod.getMethodArgumentValues(InvocableHandlerMethod.java:166)
    at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:134)
    at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:102)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:892)
    at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:797)
    at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87)
    at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1038)
    at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:942)
    at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1005)
    at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:897)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:634)
    at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:882)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:741)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
    at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92)
    at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)

    

Pom.xml

&ltdependencies&gt
        &ltdependency&gt
            &ltgroupId&gtorg.springframework.boot&lt/groupId&gt
            &ltartifactId&gtspring-boot-starter-webflux&lt/artifactId&gt
            &ltversion&gt${spring-boot.version}&lt/version&gt
            &ltexclusions&gt
                &ltexclusion&gt
                    &ltgroupId&gtorg.springframework.boot&lt/groupId&gt
                    &ltartifactId&gtspring-boot-starter-logging&lt/artifactId&gt
                &lt/exclusion&gt
            &lt/exclusions&gt
        &lt/dependency&gt
        &ltdependency&gt
            &ltgroupId&gtorg.springframework.boot&lt/groupId&gt
            &ltartifactId&gtspring-boot-starter-web&lt/artifactId&gt
            &ltversion&gt${spring-boot.version}&lt/version&gt
            &ltexclusions&gt
                &ltexclusion&gt
                    &ltgroupId&gtorg.springframework.boot&lt/groupId&gt
                    &ltartifactId&gtspring-boot-starter-logging&lt/artifactId&gt
                &lt/exclusion&gt
            &lt/exclusions&gt
        &lt/dependency&gt

        &ltdependency&gt
            &ltgroupId&gtio.projectreactor.netty&lt/groupId&gt
            &ltartifactId&gtreactor-netty&lt/artifactId&gt
            &ltversion&gt${reactor-netty.version}&lt/version&gt
        &lt/dependency&gt
    &lt/dependencies&gt

Versions:

    &ltspring-boot.version&gt2.1.4.RELEASE&lt/spring-boot.version&gt
    &ltreactor-netty.version&gt0.8.6.RELEASE&lt/reactor-netty.version&gt

Answer 1

As @Brian Clozel mentioned this can be caused from the coexistece of "Spring WebFlux" and "Spring MVC" frameworks and the Spring's automate behaviour in configuring the application as a servlet-based web application (here).

So, try to run your application as a REACTIVE web application:

//Programmatically here

public static void main(String[] args) {
    SpringApplication springApplication = new SpringApplication(YourApp.class);
    springApplication.setWebApplicationType(WebApplicationType.REACTIVE);
    springApplication.run(args);
}

//By properties here

spring.main.web-application-type=REACTIVE