type UnsupportedMetadata struct{}

func (e UnsupportedMetadata) Error() string {
	return "Unsupported headers in Metadata"
}

// isErrBucketNotFound - Check if error type is BucketNotFound.
func isErrBucketNotFound(err error) bool {
	if errors.Is(err, errVolumeNotFound) {
		return true
	}

	var bkNotFound BucketNotFound
	return errors.As(err, &bkNotFound)
}

		return errInvalidArgument
	}

	if r.Bucket == "" {
		return errInvalidArgument
	}

	if _, err := o.GetBucketInfo(ctx, r.Bucket, BucketOptions{}); err != nil {
		if isErrBucketNotFound(err) {
			return batchKeyRotationJobError{
				Code:           "NoSuchSourceBucket",
				Description:    "The specified source bucket does not exist",
				HTTPStatusCode: http.StatusNotFound,
			}
		}

			Description:    "Bucket argument missing",
			HTTPStatusCode: http.StatusBadRequest,
		}
	}

	if _, err := o.GetBucketInfo(ctx, r.Bucket, BucketOptions{}); err != nil {
		if isErrBucketNotFound(err) {
			return batchExpireJobError{
				Code:           "NoSuchSourceBucket",
				Description:    "The specified source bucket does not exist",
				HTTPStatusCode: http.StatusNotFound,
			}
		}

	if len(errs) == 0 {
		return false
	}
	notFoundCount := 0
	for _, err := range errs {
		if err != nil {
			if errors.Is(err, errVolumeNotFound) {
				notFoundCount++
			} else if isErrBucketNotFound(err) {
				notFoundCount++
			}
		}
	}
	return len(errs) == notFoundCount
}

// ObjectDir is considered dangling/corrupted if any only
// if total disks - a combination of corrupted and missing

		errors.Is(err, errErasureReadQuorum) ||
		errors.Is(err, io.ErrUnexpectedEOF) ||
		errors.As(err, &rquorum) ||
		errors.As(err, &wquorum) ||
		isErrObjectNotFound(err) ||
		isErrBucketNotFound(err) ||
		errors.Is(err, os.ErrDeadlineExceeded) ||
		notInitialized
}

func bootstrapTraceMsg(msg string) {
	info := madmin.TraceInfo{
		TraceType: madmin.TraceBootstrap,
		Time:      UTCNow(),