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APPLICATION FAILED TO START
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Description:
Field gameServiceClient in com.durain.bootuorder.controller.GameClientController required a bean of type 'org.springframework.cloud.openfeign.FeignContext' that could not be found.
	- Bean method 'feignContext' not loaded because @ConditionalOnClass did not find required class 'feign.Feign'
Action:
Consider revisiting the conditions above or defining a bean of type 'org.springframework.cloud.openfeign.FeignContext' in your configuration.
Let’s take a look the version of original dependencies
  
SpringBoot : 2.0.3
  
SpringCloud : Finchley.SR1
  
spring-cloud-starter-openfeign : 2.0.1
Search from internet, the solutions like
  
Add @EnableFeignClients into SpringBootApplication class
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@SpringBootApplication
@EnableFeignClients
public class BootApplication {
	public static void main(String[] args) {
		SpringApplication.run(BootApplication.class, args);
But… I have already did this before run the applicaiton…
  
Or use Netflix Feign like
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<dependency>
   <groupId>org.springframework.cloud</groupId>
   <artifactId>spring-cloud-starter-feign</artifactId>
</dependency>
But this have deprecated, and recommond use spring-cloud-starter-openfeign.
Solution
After few hours try and try… finally found the solution…
From maven dependencies, feign-core loaded version 9.5.1 based on spring-cloud-starter-openfeign version 2.0.1, but there have latest version 10.0.1 in maven repository, so try to use latest version
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<dependency>  
    <groupId>io.github.openfeign</groupId>  
    <artifactId>feign-core</artifactId>  
    <version>RELEASE</version>  
</dependency>  
It works now!!