return null;
        } finally {
            // Properly clean up GroovyClassLoader resources
            if (classLoader != null) {
                try {
                    classLoader.clearCache();
                    classLoader.close();
                } catch (final Exception e) {
                    logger.warn("Failed to close GroovyClassLoader", e);
                }
            }
        }

            logger.warn("Failed to load popular words.", e);
        }
        return Collections.emptyList();
    }

    /**
     * Clears all cached popular word lists.
     */
    public void clearCache() {
        cache.invalidateAll();
    }

    /**
     * Generates a cache key based on the provided parameters.
     *
     * @param seed the seed value
     * @param tags array of tags

                throw new JobProcessingException(out.toString());
            }
            ComponentUtil.getPopularWordHelper().clearCache();
        } catch (final JobProcessingException e) {
            throw e;
        } catch (final Exception e) {
            throw new JobProcessingException("SuggestCreator Process terminated.", e);

    }

    /**
     * Refreshes the suggest index.
     */
    public synchronized void refresh() {
        suggester.refresh();
        if (popularWordHelper != null) {
            popularWordHelper.clearCache();
        }
    }

    /**
     * Sets the interval for storing search logs.
     *
     * @param searchStoreInterval The search store interval in minutes.
     */

                throw new JobProcessingException(out.toString());
            }
            ComponentUtil.getPopularWordHelper().clearCache();
        } catch (final JobProcessingException e) {
            throw e;
        } catch (final Exception e) {
            throw new JobProcessingException("ThumbnailGenerator Process terminated.", e);

        } catch (final Exception e) {
            logger.warn("Failed to delete UrlFilter: sessionId={}", sid, e);
        }

        try {
            // clear queue
            urlQueueService.clearCache();
            urlQueueService.delete(sid);
        } catch (final Exception e) {
            logger.warn("Failed to delete UrlQueue: sessionId={}", sid, e);
        }

        try {
            // clear