}
        arraySettings.delete(ELEVATE_WORD_SETTINGS_KEY, elevateWord);
    }

    /**
     * Delete all elevate words.
     */
    public void deleteAll() {
        if (logger.isInfoEnabled()) {
            logger.info("Deleting all elevate words: index={}", arraySettings.arraySettingsIndexName);
        }
        arraySettings.delete(ELEVATE_WORD_SETTINGS_KEY);
    }

        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("ThumbnailGenerator is stopped.", e);
            } else if (logger.isInfoEnabled()) {
                logger.info("ThumbnailGenerator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {

        }

        if (cae.isDebugEnabled()) {
            logger.debug("[{}] Crawling Access Exception: url={}", failureUrlId, urlQueue.getUrl(), cae);
        } else if (cae.isInfoEnabled()) {
            logger.info("[{}] {}", failureUrlId, cae.getMessage());
        } else if (cae.isWarnEnabled()) {
            logger.warn("[{}] Crawling Access Exception: url={}", failureUrlId, urlQueue.getUrl(), cae);

            createSystemProperties(cmdList, propFile);

            final File baseDir = new File(servletContext.getRealPath("/WEB-INF")).getParentFile();

            if (logger.isInfoEnabled()) {
                logger.info("Crawler: \nDirectory={}\nOptions={}", baseDir, cmdList);
            }

            final JobProcess jobProcess = processHelper.startProcess(sessionId, cmdList, pb -> {

                        // ignore
                    }
                }
            });
        });

        httpClient = closeableHttpClient;
        if (logger.isInfoEnabled()) {
            logger.info("HTTP client initialized successfully: userAgent={}, maxTotal={}, defaultMaxPerRoute={}", userAgent,
                    maxTotalConnections, maxConnectionsPerRoute);
        }
    }

        appendOsStats(buf);
        appendProcessStats(buf);
        appendJvmStats(buf);
        appendFesenStats(buf);

        appendTimestamp(buf);
        buf.append('}');

        if (logger.isInfoEnabled()) {
            logger.info(buf.toString());
        }
    }

    private void appendJvmStats(final StringBuilder buf) {
        buf.append("\"jvm\":{");
        final JvmStats jvmStats = JvmStats.jvmStats();

        blockedIps = CacheBuilder.newBuilder().expireAfterWrite(blockDurationMs, TimeUnit.MILLISECONDS).maximumSize(10000).build();

        if (logger.isInfoEnabled()) {
            logger.info("RateLimitHelper initialized: windowMs={}, blockDurationMs={}", windowMs, blockDurationMs);
        }
    }

    /**
     * Check if rate limiting is enabled.

    }

    /** Fail the build with the given message, and logging relevant info*/
    private void fail(String msg, Exception... suppressed) {
        if (logger.isInfoEnabled() == false) {
            // We already log the command at info level. No need to do it twice.
            commandString.eachLine { line -> logger.error(line) }
        }
        logger.error("${name} output:")

            if (config == null) {
                throw new ThumbnailGenerationException("No CrawlingConfig: " + configId);
            }

            if (logger.isInfoEnabled()) {
                logger.info("Generating Thumbnail: {}", url);
            }

            final CrawlerClientFactory crawlerClientFactory =

        } catch (final ContainerNotAvailableException e) {
            if (logger.isDebugEnabled()) {
                logger.debug("SuggestCreator is stopped.", e);
            } else if (logger.isInfoEnabled()) {
                logger.info("SuggestCreator is stopped.");
            }
            exitCode = Constants.EXIT_FAIL;
        } catch (final Throwable t) {