Couldn't forward the HTTP response back to the HTTP client: It seems the user clicked on the 'Stop' button in his browser

I am facing a issue in which the request / response flow is not completing and i see a error message in passenger.log file as below and user is not clicking any close button.

Couldn't forward the HTTP response back to the HTTP client: It seems the user clicked on the 'Stop' button in his browser

The request is a large batch of processing employee records. I tried to modify the passenger_max_request_time but that did not work.

Can anyone please let me know what can i do so that the request continues without abruptly ending. Thanks.