same logic as grpc assign

fix https://github.com/seaweedfs/seaweedfs/issues/5213

weed/server/master_grpc_server_volume.go

@@ -61,11 +61,6 @@ func (ms *MasterServer) ProcessGrowRequest() {
 					}
 					vl.DoneGrowRequest()
 
-					if req.ErrCh != nil {
-						req.ErrCh <- err
-						close(req.ErrCh)
-					}
-
 					filter.Delete(req)
 				}()
 

weed/server/master_server_handlers.go

@@ -135,17 +135,10 @@ func (ms *MasterServer) dirAssignHandler(w http.ResponseWriter, r *http.Request)
 				writeJsonQuiet(w, r, http.StatusNotFound, operation.AssignResult{Error: "No free volumes left for " + option.String()})
 				return
 			}
-
-			errCh := make(chan error, 1)
 			vl.AddGrowRequest()
 			ms.vgCh <- &topology.VolumeGrowRequest{
 				Option: option,
 				Count:  writableVolumeCount,
-				ErrCh:  errCh,
-			}
-			if err := <-errCh; err != nil {
-				writeJsonError(w, r, http.StatusInternalServerError, fmt.Errorf("cannot grow volume group! %v", err))
-				return
 			}
 		}
 		if err != nil {

weed/topology/volume_growth.go

@@ -29,7 +29,6 @@ This package is created to resolve these replica placement issues:
 type VolumeGrowRequest struct {
 	Option *VolumeGrowOption
 	Count  int
-	ErrCh  chan error
 }
 
 type VolumeGrowOption struct {