Need to setup new MP servers for Existing Apigee Environment.

We need to setup 2 New MP servers for our existing Apigee environment in Production

We are referring the document:

https://docs.apigee.com/private-cloud/v4.17.05/adding-router-or-message-processor-node

As per current architecture, we have:

Load balancer -> 2 Apache Servers -> 4 Routers -> 4 Message Processors

Routers and Message Processors are on same servers

But now we are adding 2 new Message Processors on two new servers.

We have multiple environment in Apigee Production.

We want that the new MP servers receives request only for a Particular environment.

We have DNS entry of the host alias configured to point to an Load Balancer and In apache configuration,we are defining the router services to send traffic to for that Virtual host alias.

So now if we are installing the MP services on new Servers and register them with particular environment and deregister the existing 4 MP Services, We are getting intermittent 404 errors

HTTP/1.1 404 Not Found

Date: Mon, 10 Sep 2018 08:18:09 GMT

Content-Type: application/json

Content-Length: 190

Connection: close

• {"fault":{"faultstring":"Unable to identify proxy for host: <VirtualHostalias>:9001 and url: \/ping\/backend","detail":{"errorcode":"messaging.adaptors.http.flow.ApplicationNotFound"}}}

So kindly guide us to setup new MP servers with in existing environment and help us resolving the issue