Same File Have different ETag on from different server response with Play 1.2.10,

Hi Team,
I am working on old play 1.2.10 application , where we use activator start/run to launch the web application. I have load balance server as apache and two server instance of application. I want to generate same ETag from both server. Cloud you please help me , where I can find and fix this. I am new to play and we are using java controller.
I tried to disable using below conf parameter in application.conf, but does not works

Disable the Etag Creation By Play Server

http.useETag=false
I need help to over-ride the Assets functionality using java.

Assets built in Note :Etag support
The Assets controller automatically manages ETag HTTP Headers. The ETag value is generated from the digest (if sbt-digest is being used in the asset pipeline) or otherwise the resource name and the file’s last modification date. If the resource file is embedded into a file, the JAR file’s last modification date is used.

When a web browser makes a request specifying this Etag then the server can respond with 304 NotModified.

Thank you in Advance.

Start with application.conf and the Assets controller behavior described in the issue, then trace how activator start/run serves assets in Play 1.2.10. Check the Java controller entry point and the http.useETag setting. Done means determining why the two application servers produce different ETags and documenting or implementing a supported way to make their responses consistent.