http too many open file about xephon-k HOT 3 CLOSED

  // Customize the Transport to have larger connection pool
  defaultRoundTripper := http.DefaultTransport
  defaultTransportPointer, ok := defaultRoundTripper.(*http.Transport)
  if !ok {
      panic(fmt.Sprintf("defaultRoundTripper not an *http.Transport"))
  }
  defaultTransport := *defaultTransportPointer // dereference it to get a copy of the struct that the pointer points to
  defaultTransport.MaxIdleConns = 100
  defaultTransport.MaxIdleConnsPerHost = 100