diff --git a/cmd/frpc/main.go b/cmd/frpc/main.go
index 51eb53c..845f4f7 100644
--- a/cmd/frpc/main.go
+++ b/cmd/frpc/main.go
@@ -86,7 +86,7 @@ func main() {
 	if args["reload"] != nil {
 		if args["reload"].(bool) {
 			if err = CmdReload(); err != nil {
-				fmt.Printf("frps reload error: %v\n", err)
+				fmt.Printf("frpc reload error: %v\n", err)
 				os.Exit(1)
 			} else {
 				fmt.Printf("reload success\n")
diff --git a/conf/frpc_full.ini b/conf/frpc_full.ini
index 1204b26..4bec160 100644
--- a/conf/frpc_full.ini
+++ b/conf/frpc_full.ini
@@ -73,7 +73,7 @@ local_port = 22
 # if remote_port is 0, frps will assgin a random port for you
 remote_port = 0
 
-# if you want tp expose multiple ports, add 'range:' prefix to the section name
+# if you want to expose multiple ports, add 'range:' prefix to the section name
 # frpc will generate multiple proxies such as 'tcp_port_6010', 'tcp_port_6011' and so on.
 [range:tcp_port]
 type = tcp
diff --git a/models/proto/udp/udp.go b/models/proto/udp/udp.go
index fe548f1..15ecb9c 100644
--- a/models/proto/udp/udp.go
+++ b/models/proto/udp/udp.go
@@ -82,6 +82,7 @@ func Forwarder(dstAddr *net.UDPAddr, readCh <-chan *msg.UdpPacket, sendCh chan<-
 			mu.Lock()
 			delete(udpConnMap, addr)
 			mu.Unlock()
+			udpConn.Close()
 		}()
 
 		buf := pool.GetBuf(1500)
diff --git a/server/control.go b/server/control.go
index dbb99ad..d7938e7 100644
--- a/server/control.go
+++ b/server/control.go
@@ -265,13 +265,14 @@ func (ctl *Control) stoper() {
 	ctl.conn.Close()
 	ctl.readerShutdown.WaitDone()
 
+	ctl.mu.Lock()
+	defer ctl.mu.Unlock()
+
 	close(ctl.workConnCh)
 	for workConn := range ctl.workConnCh {
 		workConn.Close()
 	}
 
-	ctl.mu.Lock()
-	defer ctl.mu.Unlock()
 	for _, pxy := range ctl.proxies {
 		pxy.Close()
 		ctl.svr.DelProxy(pxy.GetName())
@@ -303,6 +304,7 @@ func (ctl *Control) manager() {
 			if time.Since(ctl.lastPing) > time.Duration(config.ServerCommonCfg.HeartBeatTimeout)*time.Second {
 				ctl.conn.Warn("heartbeat timeout")
 				ctl.allShutdown.Start()
+				return
 			}
 		case rawMsg, ok := <-ctl.readCh:
 			if !ok {
diff --git a/utils/net/conn.go b/utils/net/conn.go
index 78319cc..b187733 100644
--- a/utils/net/conn.go
+++ b/utils/net/conn.go
@@ -21,6 +21,7 @@ import (
 	"io"
 	"net"
 	"sync"
+	"sync/atomic"
 	"time"
 
 	"github.com/fatedier/frp/utils/log"
@@ -178,6 +179,7 @@ func (sc *SharedConn) WriteBuff(buffer []byte) (err error) {
 type StatsConn struct {
 	Conn
 
+	closed     int64 // 1 means closed
 	totalRead  int64
 	totalWrite int64
 	statsFunc  func(totalRead, totalWrite int64)
@@ -203,9 +205,12 @@ func (statsConn *StatsConn) Write(p []byte) (n int, err error) {
 }
 
 func (statsConn *StatsConn) Close() (err error) {
-	err = statsConn.Conn.Close()
-	if statsConn.statsFunc != nil {
-		statsConn.statsFunc(statsConn.totalRead, statsConn.totalWrite)
+	old := atomic.SwapInt64(&statsConn.closed, 1)
+	if old != 1 {
+		err = statsConn.Conn.Close()
+		if statsConn.statsFunc != nil {
+			statsConn.statsFunc(statsConn.totalRead, statsConn.totalWrite)
+		}
 	}
 	return
 }