public boolean isMetaInfoUnReady() {
        return this.proxyNodeInfos.isEmpty();
    }
Base Sender class:

Used to manage Sender metadata information, including Sender ID,
 status, network interaction, metadata query object, and
 Proxy node metadata information obtained from Manager, etc.
inlong-sdk/dataproxy-sdk/src/main/java/org/apache/inlong/sdk/dataproxy/sender/BaseSender.java