Spring Cloud Openfeign HystrixDelegatingContract

Caused by: java.lang.AbstractMethodError: Receiver class feign.hystrix.HystrixDelegatingContract does not define or inherit an implementation of the resolved method abstract parseAndValidateMetadata(Ljava/lang/Class;)Ljava/util/List; of interface feign.Contract. at feign.ReflectiveFeign$ParseHandlersByName.apply(ReflectiveFeign.java:151) at feign.ReflectiveFeign.newInstance(ReflectiveFeign.java:49) at feign.hystrix.HystrixFeign$Builder.target(HystrixFeign.java:63) at feign.hystrix.HystrixFeign$Builder.target(HystrixFeign.java:111)

I am getting the above error while creating feign client with HystrixFeign.

Comment From: spencergibb

Looks like you have mismatched dependencies

Comment From: govardhanaraoganji

I don't know, what I am missing in dependencies. Using: spring-boot-starter-parent as 2.1.8.RELEASE spring-cloud-dependencies as Greenwich.SR3 feign-hystrix as 10.2.3

Comment From: spencergibb

without seeing all of your dependencies I can't answer.

Comment From: govardhanaraoganji

These dependencies, will help you?

spring-boot-starter-parent as 2.1.8.RELEASE spring-cloud-dependencies as Greenwich.SR3 feign-hystrix as 10.2.3

    <!-- Spring -->
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-cache</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-zuul</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.security.oauth</groupId>
        <artifactId>spring-security-oauth2</artifactId>
        <version>${spring-security-oauth2.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-security</artifactId>
    </dependency>

    <dependency>
        <groupId>io.github.openfeign</groupId>
        <artifactId>feign-httpclient</artifactId>
    </dependency>
    <dependency>
        <groupId>io.github.openfeign</groupId>
        <artifactId>feign-hystrix</artifactId>
    </dependency>
    <dependency>
        <groupId>io.github.openfeign</groupId>
        <artifactId>feign-jackson</artifactId>
    </dependency>
    <dependency>
        <groupId>io.github.openfeign</groupId>
        <artifactId>feign-slf4j</artifactId>
    </dependency>
    <dependency>
        <groupId>io.github.openfeign.form</groupId>
        <artifactId>feign-form</artifactId>
    </dependency>

My snippet, will looks like this, MyClient client = HystrixFeign.builder() .contract(new MyClientContract(new Contract.Default())) .encoder(new JacksonEncoder(objectMapper)) .decoder(new JacksonDecoder(objectMapper)) .logger(new Slf4jLogger(MyClient.class)) .logLevel(Logger.Level.BASIC) .target(MyClient.class, URL, new MyClientFallback());

MyClientContract: public class MyClientContract implements Contract { private final Contract delegate;

/**

map key is constructed by ClassFullName + configKey. configKey is constructed by {@link
feign.Feign#configKey}
*/
public static final Map<String, MethodMetadata> METADATA_MAP = new HashMap<>();

public MyClientContract(Contract delegate) { this.delegate = delegate; }

@override public List parseAndValidateMetadata(Class<?> targetType) { List metadatas = delegate.parseAndValidateMetadata(targetType); metadatas.forEach( metadata -> METADATA_MAP.put(targetType.getName() + metadata.configKey(), metadata)); return metadatas; } }

Comment From: OlgaMaciaszek

@govardhanaraoganji Spring Cloud Greenwich is no longer supported. Can you please verify on Hoxton release train (we recommend using https://start.spring.io/ to ensure correct dependency set) and let us know if the issue persists.

Comment From: spring-projects-issues

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Comment From: spring-projects-issues

Closing due to lack of requested feedback. If you would like us to look at this issue, please provide the requested information and we will re-open the issue.

Comment From: govardhanaraoganji

Thank you for the support @spencergibb, @OlgaMaciaszek and @spring-issuemaster. I have many dependencies with our common modules so I used different approach i.e) feign-hystrix as dependency to my component so issue got resolved. Earlier It was in our common module.