spring boot api 不时返回 404 Not Found

Question

It is normal to use most of the time, and 404 appears occasionally. I don't know how to locate the problem.

controller file:

@RestController
@RequestMapping("/auth")
@RequiredArgsConstructor
public class AuthController {

    private final AuthService authService;

    @GetMapping("info")
    public Result info(@RequestParam("token") String token) {
        Map<String, Object> stringObjectMap = authService.getInfo(token);

        return ResultGenerator.success(stringObjectMap);
    }
}

GET: localhost:9000/v1/auth/info?token=gNGLJLLZsluDsIQw This ERROR MESSAGE is displaying time to time:

{
    "timestamp": "2021-06-29T06:46:35.477+0000",
    "status": 404,
    "error": "Not Found",
    "message": "No message available",
    "path": "/auth/info"
}

version info:

• spring boot: 2.2.6.RELEASE
• spring cloud: Hoxton.SR1

Append：

spring cloud gateway yml config:

spring:
  application:
    name: gateway-service
  cloud:
    nacos:
      discovery:
        server-addr: localhost:8848
    gateway:
      default-filters:
        - DedupeResponseHeader=Access-Control-Allow-Origin
      globalcors:
        cors-configurations:
          "[/**]":
            allowCredentials: true
            allowedOrigins: "*"
            allowedHeaders: "Origin, X-Requested-With, Content-Type, Accept, Content-Length, TOKEN, Authorization"
            allowedMethods: "GET, POST, PATCH, PUT, DELETE, OPTIONS"
            maxAge: 3628800
      discovery:
        locator:
          enabled: true
          lower-case-service-id: true
      routes:
        - id: auth-service
          uri: lb://auth-service
          predicates:
            - Path=/v1/auth/**
          filters:
            - StripPrefix=1
        - id: bus-service
          uri: lb://bus-service
          predicates:
            - Path=/v1/**
          filters:
            - StripPrefix=1

Solution to be verified

I used the zipkin, found the route /v1/auth/info matched to bus-service(/v1/**) , so return 404 not found.

From this to the conclusion： The writing order of the route does not guarantee its matching priority. So must add order configuration.

Answer 1

Try removing @RequestMapping("/auth") and replacing @GetMapping("info") to look like below:

@GetMapping("auth/info")
public Result info(@RequestParam("token") String token) {
    Map<String, Object> stringObjectMap = authService.getInfo(token);

Answer 2

Please add / before info like this

 @GetMapping("/info")
    public Result info(@RequestParam("token") String token) {
        Map<String, Object> stringObjectMap = authService.getInfo(token);

        return ResultGenerator.success(stringObjectMap);
    }

Since you are using @RequestParam, you need to pass value like this

localhost:9000/auth/info?token="token_value"

Answer 3

Please check this:

If the url has a lb scheme (ie lb://myservice), it will use the Spring Cloud LoadBalancerClient to resolve the name (myservice in the previous example) to an actual host and port and replace the URI in the same attribute.

By default when a service instance cannot be found in the LoadBalancer a 503 will be returned. You can configure the Gateway to return a 404 by setting spring.cloud.gateway.loadbalancer.use404=true.

You can also try to specify an order in routes list:

routes:
  - id: auth-service
    uri: lb://auth-service
    order: 0
    predicates:
      - Path=/v1/auth/**
    filters:
      - StripPrefix=1
  - id: bus-service
    uri: lb://bus-service
    order: 1
    predicates:
      - Path=/v1/**
    filters:
      - StripPrefix=1