Jni GetMethodID returns NULL, android 5.1.1?

Question

Java

Initializing the constructor for the java.net.InetAddress class returns NULL. I assume that the problem is in the new garbage collector that is used in ART.

jclass iaddrclass = env->FindClass("java/net/InetAddress");
    if (iaddrclass == NULL) {
        jniThrowException(env, "java/lang/ClassNotFoundException",
                "java.net.InetAddress");
        return;
    }
    gCachedFields.iaddr_class = (jclass) env->NewGlobalRef(iaddrclass);

//problem is in this line
    jmethodID iaddrclassinit = env->GetMethodID(iaddrclass, "<init>", "()V");

iaddrclassinit is NULL.