diff --git a/cmd/gost/cmd.go b/cmd/gost/cmd.go
index d9aeb16..2592b69 100644
--- a/cmd/gost/cmd.go
+++ b/cmd/gost/cmd.go
@@ -5,6 +5,7 @@ import (
 	"errors"
 	"fmt"
 	"net/url"
+	"os"
 	"strings"
 	"time"
 
@@ -31,6 +32,13 @@ func (l *stringList) Set(value string) error {
 func buildConfigFromCmd(services, nodes stringList) (*config.Config, error) {
 	cfg := &config.Config{}
 
+	if v := os.Getenv("GOST_PROFILING"); v != "" {
+		cfg.Profiling = &config.ProfilingConfig{
+			Addr:    v,
+			Enabled: true,
+		}
+	}
+
 	var chain *config.ChainConfig
 	if len(nodes) > 0 {
 		chain = &config.ChainConfig{
diff --git a/cmd/gost/main.go b/cmd/gost/main.go
index d1e6c43..dbdc428 100644
--- a/cmd/gost/main.go
+++ b/cmd/gost/main.go
@@ -89,7 +89,7 @@ func main() {
 			if addr == "" {
 				addr = ":6060"
 			}
-			log.Info("profiling serve on: ", addr)
+			log.Info("profiling serve on ", addr)
 			log.Fatal(http.ListenAndServe(addr, nil))
 		}()
 	}
diff --git a/pkg/connector/http/connector.go b/pkg/connector/http/connector.go
index 3d99943..965c66e 100644
--- a/pkg/connector/http/connector.go
+++ b/pkg/connector/http/connector.go
@@ -108,7 +108,10 @@ func (c *httpConnector) Connect(ctx context.Context, conn net.Conn, network, add
 	if err != nil {
 		return nil, err
 	}
-	defer resp.Body.Close()
+	// NOTE: the server may return `Transfer-Encoding: chunked` header,
+	// then the Content-Length of response will be unknown (-1),
+	// in this case, close body will be blocked, so we leave it untouched.
+	// defer resp.Body.Close()
 
 	if log.IsLevelEnabled(logger.DebugLevel) {
 		dump, _ := httputil.DumpResponse(resp, false)
diff --git a/pkg/handler/dns/handler.go b/pkg/handler/dns/handler.go
index ddc4fb3..5cb9dfa 100644
--- a/pkg/handler/dns/handler.go
+++ b/pkg/handler/dns/handler.go
@@ -148,8 +148,6 @@ func (h *dnsHandler) exchange(ctx context.Context, msg []byte, log logger.Logger
 
 	if log.IsLevelEnabled(logger.DebugLevel) {
 		log.Debug(mq.String())
-	} else {
-		log.Info(h.dumpMsgHeader(&mq))
 	}
 
 	var mr *dns.Msg
@@ -198,7 +196,7 @@ func (h *dnsHandler) exchange(ctx context.Context, msg []byte, log logger.Logger
 
 	var reply []byte
 	for _, ex := range h.exchangers {
-		log.Infof("exchange message %d via %s: %s", mq.Id, ex.String(), mq.Question[0].String())
+		log.Debugf("exchange message %d via %s: %s", mq.Id, ex.String(), mq.Question[0].String())
 		reply, err = ex.Exchange(ctx, query)
 		if err == nil {
 			break
@@ -215,12 +213,6 @@ func (h *dnsHandler) exchange(ctx context.Context, msg []byte, log logger.Logger
 		return nil, err
 	}
 
-	if log.IsLevelEnabled(logger.DebugLevel) {
-		log.Debug(mr.String())
-	} else {
-		log.Info(h.dumpMsgHeader(mr))
-	}
-
 	return reply, nil
 }
 
diff --git a/pkg/internal/util/http2/conn.go b/pkg/internal/util/http2/conn.go
index 1e0876b..eb2f43c 100644
--- a/pkg/internal/util/http2/conn.go
+++ b/pkg/internal/util/http2/conn.go
@@ -1,7 +1,6 @@
 package http2
 
 import (
-	"context"
 	"errors"
 	"net"
 	"net/http"
@@ -70,23 +69,21 @@ type ServerConn struct {
 	w          http.ResponseWriter
 	localAddr  net.Addr
 	remoteAddr net.Addr
-	cancel     context.CancelFunc
+	closed     chan struct{}
 }
 
 func NewServerConn(w http.ResponseWriter, r *http.Request, localAddr, remoteAddr net.Addr) *ServerConn {
-	ctx, cancel := context.WithCancel(r.Context())
-
 	return &ServerConn{
-		r:          r.Clone(ctx),
+		r:          r,
 		w:          w,
 		localAddr:  localAddr,
 		remoteAddr: remoteAddr,
-		cancel:     cancel,
+		closed:     make(chan struct{}),
 	}
 }
 
 func (c *ServerConn) Done() <-chan struct{} {
-	return c.r.Context().Done()
+	return c.closed
 }
 
 func (c *ServerConn) Request() *http.Request {
@@ -106,11 +103,10 @@ func (c *ServerConn) Write(b []byte) (n int, err error) {
 }
 
 func (c *ServerConn) Close() error {
-	c.cancel()
-
 	select {
-	case <-c.r.Context().Done():
+	case <-c.closed:
 	default:
+		close(c.closed)
 	}
 	return nil
 }