Spring data mongodb config - spring

Question

I have a spring boot application, using spring-data-mongodb.
With the following MongoDB config in application.properties, the mongoRepository read/write documents into the correct database: product_db. Everything is correct so far.
#MongoDB Config
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.authentication-database=product_db
spring.data.mongodb.username=demo
spring.data.mongodb.password=demo
spring.data.mongodb.database=product_db
Then I introduced spring-cloud-config, and I moved the exact same MongoDB config to my-service.propertiesso the config client can get these from config server. The weird thing is that now mongoRepository read/write document from/into database: test
Where does spring-cloud-config-server specific the database name? How to config to ask mongoRepository to use the correct database?
Code snippet as following
Config Server
#SpringBootApplication
#EnableDiscoveryClient
#EnableConfigServer
public class ConfigServiceApplication {
public static void main(String[] args) {
SpringApplication.run(ConfigServiceApplication.class, args);
}
}
application.properties for config server
server.port=2000
spring.application.name=config-server
eureka.client.service-url.defaultZone=http://localhost:8260/eureka
spring.profiles.active=native
spring.cloud.config.server.native.search-locations=file:///${user.home}/Project/configuration
my-test.properties
server.port=2100
spring.application.name=service-sample
eureka.client.service-url.defaultZone=http://localhost:8260/eureka
logging.level.org.springframework=INFO
#MongoDB Config
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.authentication-database=product_db
spring.data.mongodb.username=demo
spring.data.mongodb.password=demo
spring.data.mongodb.database=product_db
For my-service as the config client:
#EnableDiscoveryClient
#SpringBootApplication
#EnableMongoRepositories(basePackages = "com.mydemo.service.sample.repositories")
public class Application {
public static void main(String[] args) {
SpringApplication.run(Application.class, args);
}
}
bootstrap.properties for config client:
server.port=2100
spring.application.name=my-service
eureka.client.service-url.defaultZone=http://localhost:8260/eureka
spring.cloud.config.discovery.enabled=true
spring.cloud.config.discovery.service-id=config-server
As mentioned before, if I remove the bootstrap.properties, and use the following application.properties file for my-service, everything is good.
server.port=2100
spring.application.name=service-sample
eureka.client.service-url.defaultZone=http://localhost:8260/eureka
logging.level.org.springframework=INFO
#MongoDB Config
spring.data.mongodb.host=localhost
spring.data.mongodb.port=27017
spring.data.mongodb.authentication-database=product_db
spring.data.mongodb.username=demo
spring.data.mongodb.password=demo
spring.data.mongodb.database=product_db