Spring Cloud Stream App That Consumes its own Dead Letters

application.properties

spring.cloud.stream.bindings.input.destination=foo
spring.cloud.stream.bindings.input.group=foo
spring.cloud.stream.rabbit.bindings.input.consumer.autoBindDlq=true
spring.cloud.stream.rabbit.bindings.input.consumer.deadLetterRoutingKey=foo
spring.cloud.stream.rabbit.bindings.input.consumer.republishToDlq=true

spring.cloud.stream.bindings.errors.group=foo.dlq
spring.cloud.stream.bindings.errors.destination=foo
spring.cloud.stream.rabbit.bindings.errors.bindQueue=false
spring.cloud.stream.rabbit.bindings.errors.declareExchange=false

Gitter2Application.java

/*
 * Copyright 2017 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.example;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.stream.annotation.EnableBinding;
import org.springframework.cloud.stream.annotation.Input;
import org.springframework.cloud.stream.annotation.StreamListener;
import org.springframework.cloud.stream.messaging.Sink;
import org.springframework.integration.annotation.ServiceActivator;
import org.springframework.messaging.Message;
import org.springframework.messaging.SubscribableChannel;

/**
 * @author Gary Russell
 */
@SpringBootApplication
@EnableBinding(Gitter2Application.Foo.class)
public class Gitter2Application {

	public static void main(String[] args) {
		SpringApplication.run(Gitter2Application.class, args);
	}

	@StreamListener(Sink.INPUT)
	public void listen(String in) {
		throw new RuntimeException("fail");
	}

	@ServiceActivator(inputChannel = "errors")
	public void handle(Message<?> failedMessage) {
		System.out.println("Failed message " + failedMessage);
	}
	
	public interface Foo extends Sink {

		@Input("errors")
		SubscribableChannel errors();

	}

}

I think I have found the issue. I have adjusted this:
spring.cloud.stream.rabbit.bindings.errors.bindQueue=false spring.cloud.stream.rabbit.bindings.errors.declareExchange=false to:
spring.cloud.stream.rabbit.bindings.errors.consumer.bindQueue=false spring.cloud.stream.rabbit.bindings.errors.consumer.declareExchange=false .
Now I see a normal behavior , the DLQ handle just the error.
Also an important note is : I was using springboot 1.4.2.RELEASE and springCloudVersion = 'Camden.SR5'..it should be upgraded to springCloudVersion = 'Camden.SR7'.

Thank for your guidance.