thanos-io/thanos · error

read dir

Error message

read dir

What it means

Raised in runutil.DeleteAll when os.ReadDir on the target directory fails with an error other than not-exist (which is tolerated and returns nil). Typical causes are permission denied on dir or dir being a non-directory path; deletion aborts before removing anything.

Solutions

1. Check permissions on the directory being deleted
2. Ensure the path is a directory, not a file or mount point
3. Handle the not-exist case — DeleteAll already tolerates it by design

When it happens

Trigger: Thrown at pkg/runutil/runutil.go:188 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of thanos-io/thanos@35b8b99117 (2026-09-07). Data as JSON: /api/errors/f631906de514c75c. Report an issue: GitHub.

Appendix: source

Thrown at pkg/runutil/runutil.go:188

	// Prepend the io.Copy error.
	merr := errutil.MultiError{}
	merr.Add(copyErr)
	merr.Add(*err)

	*err = merr.Err()
}

// DeleteAll deletes all files and directories inside the given
// dir except for the ignoreDirs directories.
// NOTE: DeleteAll is not idempotent.
func DeleteAll(dir string, ignoreDirs ...string) error {
	entries, err := os.ReadDir(dir)
	if os.IsNotExist(err) {
		return nil
	}
	if err != nil {
		return errors.Wrap(err, "read dir")
	}
	var groupErrs errutil.MultiError

	var matchingIgnores []string
	for _, d := range entries {
		if !d.IsDir() {
			if err := os.RemoveAll(filepath.Join(dir, d.Name())); err != nil {
				groupErrs.Add(err)
			}
			continue
		}

		// ignoreDirs might be multi-directory paths.
		matchingIgnores = matchingIgnores[:0]
		ignore := false
		for _, ignoreDir := range ignoreDirs {
			id := strings.Split(ignoreDir, "/")
			if id[0] == d.Name() {

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