Feign Observable serialization doesn't work

build.gradle

apply plugin: 'java'

sourceCompatibility = 1.8

repositories {
    mavenCentral()
}

dependencies {
    compile 'com.netflix.feign:feign-core:8.14.4'
    compile 'com.netflix.feign:feign-jackson:8.14.4'
    compile 'com.netflix.feign:feign-hystrix:8.14.4'
}

ListExample.java

package net.armesto.feign;

import feign.Feign;
import feign.Param;
import feign.RequestLine;
import feign.jackson.JacksonDecoder;
import feign.jackson.JacksonEncoder;
import rx.Observable;

import java.util.List;


public class ListExample {
    public static void main(String[] args) {
        GitHub github = Feign.builder()
                .encoder(new JacksonEncoder())
                .decoder(new JacksonDecoder())
                .target(GitHub.class, "https://api.github.com");

        github.contributors("netflix", "feign")
                .forEach(
                        contributor -> System.out.println(contributor.login + " (" + contributor.contributions + ")")
                );
    }
}

class Contributor {
    String login;
    int contributions;

    public void setLogin(String login) {
        this.login = login;
    }

    public void setContributions(int contributions) {
        this.contributions = contributions;
    }
}

interface GitHub {
    @RequestLine("GET /repos/{owner}/{repo}/contributors")
    List<Contributor> contributors(@Param("owner") String owner, @Param("repo") String repo);
}

ObservableExample.java

package net.armesto.feign;

import feign.Feign;
import feign.Param;
import feign.RequestLine;
import feign.jackson.JacksonDecoder;
import feign.jackson.JacksonEncoder;
import rx.Observable;


public class ObservableExample {
    public static void main(String[] args) {
        GitHub github = HystrixFeign.builder()
                .encoder(new JacksonEncoder())
                .decoder(new JacksonDecoder())
                .target(GitHub.class, "https://api.github.com");

        github.contributors("netflix", "feign")
                .subscribe(
                        contributor -> System.out.println(contributor.login + " (" + contributor.contributions + ")")
                );
    }
}

class Contributor {
    String login;
    int contributions;

    public void setLogin(String login) {
        this.login = login;
    }

    public void setContributions(int contributions) {
        this.contributions = contributions;
    }
}

interface GitHub {
    @RequestLine("GET /repos/{owner}/{repo}/contributors")
    Observable<Contributor> contributors(@Param("owner") String owner, @Param("repo") String repo);
}

Any solution to this?

Yes OpenFeign/feign#331