@Override
    public void start() throws Exception {
        // when agent start, check local ip and fetch manager ip list;
        localIp = conf.get(AGENT_LOCAL_IP);
        uuid = fetchLocalUuid();
        submitWorker(configFetchThread());
    }
Thread for config fetcher.

@return runnable profile.
inlong-agent/agent-installer/src/main/java/org/apache/inlong/agent/installer/ManagerFetcher.java