private void offlineRemovedTopic(List<String> oldTopics) {
        for (String fetchKey : oldTopics) {
            LOGGER.info("offlineRemovedTopic {}", fetchKey);
            InLongTopic topic = fetchers.get(fetchKey).getTopics().get(0);
            TopicFetcher topicFetcher = fetchers.get(fetchKey);
            if (topicFetcher != null) {
                topicFetcher.close();
            }
            fetchers.remove(fetchKey);
            if (context != null && topic != null) {
                context.addTopicOfflineCount(1);
            } else {
                LOGGER.error("context == null or context.getStatManager() == null or inLongTopic == null :{}",
                        topic);
            }
        }
    }
offline inlong topic which not belong the sortTaskId

@param oldTopics {@link List}
inlong-sdk/sort-sdk/src/main/java/org/apache/inlong/sdk/sort/manager/InlongSingleTopicManager.java