IntelliJ shows "Cannot resolve configuration property" error for Spring Cloud GCP PubSub configuration

Question

My Spring Boot application depends on Spring Cloud GCP PubSub, with maven dependency specified as below:

    <dependency>
      <groupId>com.google.cloud</groupId>
      <artifactId>spring-cloud-gcp-starter-pubsub</artifactId>
      <version>3.4.0</version>
    </dependency>

When I configured for it in application.yaml based on its doc at https://googlecloudplatform.github.io/spring-cloud-gcp/3.4.0/reference/html/index.html#cloud-pubsub, my IntelliJ shows "the configuration property is not found", see screenshot

Below is a snippet of my applcation.yaml file:

spring:
  application:
    name: cat-service
  cloud:
    gcp:
      pubsub:
        subscriber:
          min-duration-per-ack-extension: 300 # 5 minutes
    kubernetes:
      loadbalancer:
        mode: service
      reload:
        enabled: true
        mode: polling
        period: 5000
      config:
        sources:
        - name: ${spring.application.name}
    loadbalancer:
      ribbon:
        enabled: false

My questions are:

1. How do I tell whether it's a real configuration error (e.g. the dependency does not support this config property), or is it something wrong with IntelliJ?
2. How do I get rid of this error?

Answer 1

Did you try to add project-id, subscription-name and credentials to your application.yaml?