assertEquals("initial", SystemUtil.getSearchEngineHttpAddress());

            // Change value and verify it's read fresh
            System.setProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS, "changed");
            assertEquals("changed", SystemUtil.getSearchEngineHttpAddress());

            // Clear property

     * then falls back to the URL configured in FessConfig.
     *
     * @return the HTTP URL for the OpenSearch server
     */
    public static String getFesenHttpUrl() {
        final String url = SystemUtil.getSearchEngineHttpAddress();
        if (url != null) {
            return url;
        }
        final FessConfig fessConfig = ComponentUtil.getFessConfig();
        return fessConfig.getFesenHttpUrl();
    }

    /**

                logger.debug("Option: {}", options);
            } catch (final Exception e) {
                // ignore
            }
        }

        final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
        if (StringUtil.isNotBlank(httpAddress)) {
            System.setProperty(FesenClient.HTTP_ADDRESS, httpAddress);
        }

        TimeoutTask systemMonitorTask = null;
        int exitCode;

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

        }
        cmdList.add(buf.toString());

        if (useLocalFesen) {
            final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
            if (StringUtil.isNotBlank(httpAddress)) {
                cmdList.add("-D" + Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS + "=" + httpAddress);
            }
        }

            } catch (final Exception e) {
                // ignore
            }
        }

        initializeProbes();

        final String httpAddress = SystemUtil.getSearchEngineHttpAddress();
        if (StringUtil.isNotBlank(httpAddress)) {
            System.setProperty(FesenClient.HTTP_ADDRESS, httpAddress);
        }

        TimeoutTask systemMonitorTask = null;