diff --git a/components/engine/server/server.go b/components/engine/server/server.go
index 1cf01eb688..cfee4fbcac 100644
--- a/components/engine/server/server.go
+++ b/components/engine/server/server.go
@@ -774,9 +774,7 @@ func (srv *Server) CmdRun(stdin io.ReadCloser, stdout io.Writer, args ...string)
 		}
 		if *fl_attach {
 			future.Go(func() error {
-				log.Printf("CmdRun(): start receiving stdin\n")
 				_, err := io.Copy(cmd_stdin, stdin)
-				log.Printf("CmdRun(): done receiving stdin\n")
 				cmd_stdin.Close()
 				return err
 			})