@Override
      public void onError(Throwable error) {
        future.completeExceptionally(new SamzaException(errorMessage, error));
      }
Construct an instance of {@link CouchbaseTableWriteFunction}.
@param bucketName Name of the couchbase bucket
@param clusterNodes Some Hosts of the Couchbase cluster. Recommended to provide more than one nodes so that if
                    the first node could not be connected, other nodes can be tried.
@param valueClass Type of values
samza-kv-couchbase/src/main/java/org/apache/samza/table/remote/couchbase/CouchbaseTableWriteFunction.java