499 Client Closed Request

I am using a microservice architecture with angular and asp.net. I am registering all my Web API services through Consul (which is running on localhost 8500 port). When a service is calling from angular(tried with postman) and if it take more than 1.5 minutes I am getting the following error. Please help me to figure out the issue.

Error Details : an nginx Http server extension. This code is introducced to log the case when the connection is closed by client while http server is processsing its request.making server unable to send the HTTP header back