Yaml instance not created when constructor argument is passed

Question

I am using snakeyml to read yml file and load it in Java objects.

Issue: When I do a Yaml yml = new Yaml() , yml instance is created. But when I pass the constructor argument, the yml instance is not created. I don't see an exception either. This is the complete code.

private static YamlConfig readStatsConfig()
        throws IOException {

    InputStream input = new FileInputStream(new File(configFile));
    Constructor constructor = new Constructor(YamlConfig.class);

    TypeDescription description = new TypeDescription(YamlConfig.class);
    description.putListPropertyType("resources", YamlConfig.Resource.class);
    constructor.addTypeDescription(description);

    TypeDescription description = new TypeDescription(
                    YamlConfig.Resource.class);
    description.putListPropertyType("stats", YamlConfig.StatsInfo.class);
    constructor.addTypeDescription(description);

    Yaml yaml = new Yaml(constructor);

    YamlConfig cfg = (YamlConfig) yaml.load(input);

    mainLogger.info(cfg);

    return cfg;
}

Code exit in the following statement:

Yaml yaml = new Yaml(constructor);

Answer 1

I fixed the issue by excluding snakeyml dependency in TestNG JARs. All we need to do is to add the following in the project POM has dependency with TestNG.

<dependency>
            <groupId>org.testng</groupId>
            <artifactId>testng</artifactId>
            <version>6.3.1</version>
             <type>jar</type>
            <exclusions>
                <exclusion>
                    <artifactId>snakeyaml</artifactId>
                    <groupId>org.yaml</groupId>
                </exclusion>
            </exclusions>
        </dependency>