skip not found error on deletion

weed/shell/command_volume_tier_move.go

@@ -8,6 +8,7 @@ import (
 	"github.com/chrislusf/seaweedfs/weed/wdclient"
 	"io"
 	"path/filepath"
+	"strings"
 	"time"
 
 	"github.com/chrislusf/seaweedfs/weed/storage/needle"
@@ -136,12 +137,14 @@ func doVolumeTierMove(commandEnv *CommandEnv, writer io.Writer, vid needle.Volum
 			for _, loc := range locations {
 				if loc.Url != dst.dataNode.Id {
 					if err = deleteVolume(commandEnv.option.GrpcDialOption, vid, loc.Url); err != nil {
+						if !strings.Contains(err.Error(), "not found") {
 							fmt.Fprintf(writer, "failed to delete volume %d on %s: %v\n", vid, loc.Url, err)
 						}
 					}
 				}
 			}
 		}
+	}
 
 	if !hasFoundTarget {
 		fmt.Fprintf(writer, "can not find disk type %s for volume %d\n", toDiskType.ReadableString(), vid)