Method Run

library/cpp/neh/http2.cpp:1145–1172

    }

    void THttpRequest::Run(THttpRequestRef& req) {
#ifdef DEBUG_STAT
        if ((++TDebugStat::RequestTotal & 0xFFF) == 0) {
            TDebugStat::Print();
        }
#endif
        try {
            while (!Canceled_) {
                THttpConnRef conn;
                if (HttpConnManager()->Get(conn, Addr_->Id)) {
                    DBGOUT("Use connection from cache");
                    Conn_ = conn; //thread magic
                    if (!conn->StartNextRequest(req)) {
                        continue; //if use connection from cache, ignore write error and try another conn
                    }
                } else {
                    HttpConnManager()->CheckLimits(); //here throw exception if reach hard limit (or atexit() state)
                    Conn_ = THttpConn::Create(HttpConnManager()->GetIOService());
                    TEndpoint ep(new NAddr::TAddrInfo(&*AddrIter_));
                    Conn_->StartRequest(req, ep, Addr_->Id, THttp2Options::SymptomSlowConnect); // can throw
                }
                break;
            }
        } catch (...) {
            Conn_.Reset();
            throw;
        }
    }

    //it seems we have lost TCP SYN packet, create extra connection for decrease response time
    void THttpRequest::OnDetectSlowConnecting() {