com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

Question

I am very new to the microservices and trying to run the code from link: https://dzone.com/articles/advanced-microservices-security-with-spring-and-oa . When I simply run th

Answer 1

I was facing the same error when my Eureka client i.e microservice trying to register herself with Eureka Server.

Client registration eureka service failure registration failed Cannot execute request on any known server

This error message comes because of following two possibilities.

1) The defaultZone address is incorrect , either its misspelled or the space is missing after :.

2) Spring security implemented on Eureka server require a valid CSRF token be sent with every request. Eureka clients will not generally possess a valid cross site request forgery (CSRF) token. So you will need to disable this requirement for the /eureka/** endpoints.

After disabling the CSRF token with follwoing line of code my Eureka client successfully register them selves with Eureka Server.

@EnableWebSecurity
class WebSecurityConfig extends WebSecurityConfigurerAdapter {

    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.csrf().ignoringAntMatchers("/eureka/**");
        super.configure(http);
    }
}

Also below is the link from spring docs.

https://cloud.spring.io/spring-cloud-static/Greenwich.SR2/single/spring-cloud.html#_securing_the_eureka_server