Subdoc spews INVALID_ARGUMENTS against Vulcan

public class Subdoc {

    public static void main(String[] args) {

        Cluster cluster = CouchbaseCluster.create("172.23.120.17");

        cluster.authenticate("default", "password");

        Bucket bucket = cluster.openBucket("default");

        String path = "child.child.child.child.child.child.child.child.tag";

        ResponseStatus status = null;

        try {

            DocumentFragment<Lookup> documentFragment = bucket.lookupIn("2").get(path).execute();

            status = documentFragment.status(path);

        } catch (Exception e) {

            e.printStackTrace();

        }

        if (status != null) {

            System.out.printf("status:%s\n", status.toString());

        }

    }

}

at com.couchbase.client.java.subdoc.SubdocHelper.commonSubdocErrors(SubdocHelper.java:101)

at com.couchbase.client.java.subdoc.AsyncLookupInBuilder$5.call(AsyncLookupInBuilder.java:552)

at com.couchbase.client.java.subdoc.AsyncLookupInBuilder$5.call(AsyncLookupInBuilder.java:521)

at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)

at rx.observers.Subscribers$5.onNext(Subscribers.java:235)

at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onNext(OnSubscribeDoOnEach.java:101)

at rx.internal.producers.SingleProducer.request(SingleProducer.java:65)

at rx.Subscriber.setProducer(Subscriber.java:209)

at rx.Subscriber.setProducer(Subscriber.java:205)

at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)

at rx.Subscriber.setProducer(Subscriber.java:205)

at rx.Subscriber.setProducer(Subscriber.java:205)

at rx.subjects.AsyncSubject.onCompleted(AsyncSubject.java:103)

at com.couchbase.client.core.endpoint.AbstractGenericHandler.completeResponse(AbstractGenericHandler.java:418)

at com.couchbase.client.core.endpoint.AbstractGenericHandler.access$000(AbstractGenericHandler.java:81)

at com.couchbase.client.core.endpoint.AbstractGenericHandler$1.call(AbstractGenericHandler.java:436)

at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)

at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)

at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

Caused by: rx.exceptions.OnErrorThrowable$OnNextValue: OnError while emitting onNext value: com.couchbase.client.core.message.kv.subdoc.simple.SimpleSubdocResponse.class

at rx.exceptions.OnErrorThrowable.addValueAsLastCause(OnErrorThrowable.java:118)

at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:73)

... 20 more