throw new IORuntimeException(e);
                    }
                    logFileItems.add(map);
                });
            } catch (final Exception e) {
                throw new FessSystemException("Failed to access log files: logFilePath=" + logFilePath, e);
            }
        }
        return logFileItems;
    }

    /**
     * Checks if the given filename is a log file.
     *