Kong 2.3.x - Apigateway "message":"The upstream server is timing out"

Added service and route to local API in kong api server but when access the API thru api gateway , below error “message”:“The upstream server is timing out”

connection timeout has been set to 600000
read timeout has been set to 600000
write timeout has been set to 600000

Note : installed kong api gateway in my server

How can you resolve this problem?

Did you try calling the your actual backend service via curl/Postman from that server to check whether you were able to access the API?