IllegalStateException when path variable is specified in @FeignClient path

[tedliang]

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Describe the bug Got the following error while starting the app:

Unexpected exception during bean creation; nested exception is java.lang.IllegalStateException: Body parameters cannot be used with form parameters.
Warnings:
- 
at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800)

org.springframework.cloud:spring-cloud-starter-openfeign:3.1.1

@FeignClient(name = "foo-service", path = "/user/{userId}")
public interface FooService {
    @RequestMapping(value = "/foo", method = RequestMethod.POST)
    void doFoo(@PathVariable Long userId, @RequestBody User user);
}

Works fine if there is no @RequestBody in the method.