We are getting some time 502 error "502 - web server recived an invalid response while acting as a gateway or proxy server"
our platform detail, 2 * windows server 2012 with web server, 2 * windows server 2008 with application server, 2 * windows server 2012 with db server.
with web server we are using ARR to redirect request to application server. some time we are facing 502 error. concurrent user is 6000.
please suggest me what we have to do to resolve 502 error.