How to solve error nested mappings are not allowed in compact mappings

Question

It says nested mappings are not allowed in compact mappings

eureka:
    client:
        register-with-eureka: false
        fetch-registry: false
        
        
server.port: 8796
  
  
spring.application.name: eurekaservice

After rewriting many times, it somehow stopped showing me error! Please some one say what would be the cause?

Answer 1

check tabs and spaces. YAML expects indentations with spaces, not tabs. A lot of editors allow you to automatically convert tabs to spaces. It’s usually in the settings somewhere and you’ll want that switched on if you intend to tab-indent YAML.

Answer 2

This can also happen if one or more of your values has a colon character (:), and the value(s) aren't wrapped in quotes.