Issue #1930 in kubernetes-client/java: Yaml.load fails for custom resource definition with x-kubernetes-preserve-unknown-fields

JavaClientBug.java

import java.io.IOException;

import io.kubernetes.client.util.Yaml;

public class JavaClientBug {

    public static void main(String... args) throws IOException {
        Yaml.load("---\n" +
                "apiVersion: apiextensions.k8s.io/v1\n" +
                "kind: CustomResourceDefinition\n" +
                "metadata:\n" +
                "  name: crd.java.client.bug\n" +
                "spec:\n" +
                "  group: java.client.bug\n" +
                "  versions:\n" +
                "  - name: v1alpha1\n" +
                "    storage: true\n" +
                "    served: true\n" +
                "    schema:\n" +
                "      openAPIV3Schema:\n" +
                "        type: object\n" +
                "        x-kubernetes-preserve-unknown-fields: true\n" +
                // This works but is incompatible with other K8s clients:
                //"        xKubernetesPreserveUnknownFields: true\n" +
                "  names:\n" +
                "    kind: myCrd\n" +
                "    listKind: myCrdList\n" +
                "    plural: myCrds\n" +
                "    shortNames:\n" +
                "    - myCrd\n" +
                "    singular: myCrd\n" +
                "  scope: Namespaced\n");
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>java-client-bug</artifactId>
    <version>1.0-SNAPSHOT</version>

    <properties>
        <maven.compiler.source>8</maven.compiler.source>
        <maven.compiler.target>8</maven.compiler.target>
    </properties>
    <dependencies>
    <dependency>
        <groupId>io.kubernetes</groupId>
        <artifactId>client-java</artifactId>
        <version>11.0.2</version>
    </dependency>
    </dependencies>
</project>