I have deployed a 4 node Couchbase cluster using Google GKE. The master node exposes ports 8091, 8093 to the Loadbaancer. When connecting to the Loadbalancer IP (external) via a Java app to insert data, I get the timeout error with this stack:

Apr 04, 2017 3:32:15 PM com.couchbase.client.core.endpoint.AbstractEndpoint$2 operationComplete
WARNING: [null][ViewEndpoint]: Socket connect took longer than specified timeout.
Apr 04, 2017 3:32:15 PM com.couchbase.client.core.endpoint.AbstractEndpoint$2 operationComplete
WARNING: [null][KeyValueEndpoint]: Socket connect took longer than specified timeout.
Apr 04, 2017 3:32:15 PM com.couchbase.client.deps.io.netty.util.concurrent.DefaultPromise notifyListener0
WARNING: An exception was thrown by com.couchbase.client.core.endpoint.AbstractEndpoint$2.operationComplete()
rx.exceptions.OnErrorNotImplementedException: connection timed out: /10.4.0.3:8093
    at rx.Observable$26.onError(Observable.java:7955)
    at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:159)
    at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)
    at rx.internal.operators.OperatorMap$1.onError(OperatorMap.java:48)

What's puzzling is that the stack shows 10.4.0.3:8093 which is actually the the IP of the docker container. Appreciate all suggestions.