TUN-2955: Fix connection and goroutine leaks when tunnel conection is terminated on error. Only unregister tunnels that had connected successfully. Close edge connection used to unregister the tunnel. Use buffered channels for error channels where receiver may quit early on context cancellation.

watcher/file.go

@@ -30,7 +30,11 @@ func (f *File) Add(filepath string) error {
 
 // Shutdown stop the file watching run loop
 func (f *File) Shutdown() {
-	f.shutdown <- struct{}{}
+	// don't block if Start quit early
+	select {
+	case f.shutdown <- struct{}{}:
+	default:
+	}
 }
 
 // Start is a runloop to watch for files changes from the file paths added from Add()