juicedata/juicefs · error

root required

Error message

root required

What it means

Returned by objbench for the change owner/group test case: the test path is backed by a local file system or jfs:// and the benchmark was not started as root (uid != 0), so chown-style ownership changes cannot be performed and root is required for this check.

Source

Thrown at cmd/objbench.go:1096

			r, err := blob.Get(ctx, key, 0, -1)
			if err != nil {
				return fmt.Errorf("failed to get multipart upload file: %v", err)
			}
			cnt, err := io.ReadAll(r)
			if err != nil {
				return fmt.Errorf("failed to get multipart upload file: %v", err)
			}
			if !bytes.Equal(cnt, bytes.Join(content, nil)) {
				return fmt.Errorf("the content of the multipart upload file is incorrect")
			}
			return nil
		}
		return utils.ErrNotSUP
	})

	funFSCase("change owner/group", func() error {
		if (strings.HasPrefix(blob.String(), "file://") || strings.HasPrefix(blob.String(), "jfs://")) && os.Getuid() != 0 {
			return errors.New("root required")
		}
		if err := fi.Chown(key, "nobody", groupName); err != nil {
			return fmt.Errorf("failed to chown object %s", err)
		}
		if objInfo, err := blob.Head(ctx, key); err != nil {
			return fmt.Errorf("failed to head object %s", err)
		} else if info, ok := objInfo.(object.File); ok {
			if info.Owner() != "nobody" {
				return fmt.Errorf("expect owner nobody but got %s", info.Owner())
			}
			if info.Group() != groupName {
				return fmt.Errorf("expect group %s but got %s", groupName, info.Group())
			}
		}
		return nil
	})

	funFSCase("change permission", func() error {

View on GitHub (pinned to c9a67b23e8)

Solutions

1. Run `juicefs objbench` with sudo/root when testing file:// or jfs:// backends

When it happens

Trigger: Thrown at cmd/objbench.go:1096 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of juicedata/juicefs@c9a67b23e8 (2026-09-06). Data as JSON: /api/errors/6b774d92a17fe8bf. Report an issue: GitHub.