QA-5620: fix

Author: Mikhail Podtserkovskiy

handlers/createSession.go

@@ -13,6 +13,7 @@ import (
 	"net/http"
 	"net/http/httputil"
 	"net/url"
+	"fmt"
 )
 
 type CreateSession struct {
@@ -94,7 +95,7 @@ func (h *CreateSession) tryCreateSession(r *http.Request, capabilities *capabili
 		if err != nil {
 			log.Errorf("fail cleanUp node on create session failure, %s", err)
 		}
-		return nil, errors.New("Failure proxy request on node " + node.String() + ": " + string(tw.Output))
+		return nil, fmt.Errorf("failure proxy request on node %s: %s msg: %s", node, tw.Output, transport.Error)
 	}
 
 	return tw, nil

proxy/transport.go

@@ -18,13 +18,16 @@ type CreateSessionTransport struct {
 	pool      *pool.Pool
 	node      *pool.Node
 	IsSuccess bool
+	Error     error
 }
 
 func NewCreateSessionTransport(pool *pool.Pool, node *pool.Node) *CreateSessionTransport {
 	return &CreateSessionTransport{pool: pool, node: node}
 }
 
 func (t *CreateSessionTransport) RoundTrip(request *http.Request) (*http.Response, error) {
+	var err error
+	defer func() {t.Error = err}() // dirty hack, for get error from round trip
 	response, err := http.DefaultTransport.RoundTrip(request)
 	if err != nil {
 		return nil, errors.New("round trip to node: " + err.Error())