404 error in spring cloud gateway for every alternate request - spring-boot

Question

I am encountering a very peculiar problem in spring cloud gateway. Every alternate request returns a 404. This happens across all services I've configured in the api-gateway without exception. I don't even know where to start to debug this problem.
Here's my application.yml file for common config.
server:
port: 8080
ssl:
enabled: true
key-store: classpath:keystore.p12
key-store-password: password
key-store-type: pkcs12
key-alias: tomcat
security:
require-ssl=true:
logging:
level:
org:
springframework:
cloud.gateway: DEBUG
http.server.reactive: DEBUG
web.reactive: DEBUG
spring:
application:
name: api-gateway
cloud:
gateway:
httpclient:
ssl:
useInsecureTrustManager: true
Here's my java config file
#EnableWebFluxSecurity
public class SecurityConfig {
#Bean
public SecurityWebFilterChain springSecurityFilterChain(ServerHttpSecurity http,
ReactiveClientRegistrationRepository clientRegistrationRepository) {
// Authenticate through configured OpenID Provider
http.oauth2Login();
// Also logout at the OpenID Connect provider
http.logout(logout -> logout.logoutSuccessHandler(new OidcClientInitiatedServerLogoutSuccessHandler(
clientRegistrationRepository)));
// Require authentication for all requests
http.authorizeExchange().anyExchange().authenticated();
// Allow showing /home within a frame
http.headers().frameOptions().mode(Mode.SAMEORIGIN);
// Disable CSRF in the gateway to prevent conflicts with proxied service CSRF
http.csrf().disable();
return http.build();
}
}
Here's the spring profile specific config file that gets loaded on top of the common application.yml file.
spring:
security:
oauth2:
client:
provider:
keycloak:
issuerUri: http://localhost:9080/auth/realms/mylocal
userNameAttribute: preferred_username
registration:
keycloak:
clientId: api-gateway-client
clientSecret: abcdefgh-ijkl-mnop-qrst-uvwxyz5d6a9
cloud:
gateway:
default-filters:
- TokenRelay
routes:
- id: news
uri: http://localhost:8082/news
predicates:
- Path= /news/**
- id: customers
uri: http://localhost:8083/customers
predicates:
- Path= /boards/**
- id: search
uri: http://localhost:8085/search
predicates:
- Path= /search/**

Answer 1

Hey i got the issue recently too, I figure out that it was the load balancing the issue. Make sure that your spring.application.name of the microservice that you try to contact are all in capital letter (EXAMPLE) especially if you use Eureka. (hope it helps)

Answer 2

I had a similar issue. The reason was in registration of several services under the same application name in my Eureka server. Just like this:
Eureka instances screenshot
Those are completely different services, but they are registered under one application name. So when a request is made through load balancer, the latter tries to use both of the service urls. One service is able to serve request correctly, but another one may know nothing about the requested path, that is why 404 is returned.

Answer 3

Check if there are two or more microservices using the same spring.application.name and registered with eureka.

Answer 4

I know it's an old question... But might help future readers.
hey, here is the simplest solution I found for myself, in the browser
url, instead of 'localhost', give your system's name.
ex:
http://hp:8083/SERVICE-NAME/customers/**
also make sure to name all your spring application in uppercase.