diff --git a/core/xray/app/dispatcher/linkmanager.go b/core/xray/app/dispatcher/linkmanager.go
index 7f260e7..4e0239f 100644
--- a/core/xray/app/dispatcher/linkmanager.go
+++ b/core/xray/app/dispatcher/linkmanager.go
@@ -39,8 +39,6 @@ func (m *LinkManager) RemoveWriter(writer *ManagedWriter) {
 }
 
 func (m *LinkManager) CloseAll() {
-	m.mu.Lock()
-	defer m.mu.Unlock()
 	for w, r := range m.links {
 		common.Close(w)
 		common.Interrupt(r)