在创建节点客户端时获取org.elasticsearch.discovery.MasterNotDiscoveredException

Question

我使用以下代码创建elasticsearch的客户端节点。直到现在突然我才开始获得MasterNotDiscoveredException，这一点工作正常。我已将配置值更改为，但问题仍然相同。

  

discovery.zen.ping.multicast.enabled：false

如果我切换到TransportClient，则同样有效。请告诉我节点客户端的问题

public static Client createESClient() {
    // creating a client node
    Node node =
        nodeBuilder().clusterName(CLUSTERNAME).client(true).data(false)
            .node();
    Client client = node.client();
    LOGGER.debug("the node has been created ");
    return client;
}

---

Exception in thread "main" org.elasticsearch.discovery.MasterNotDiscoveredException: waited for [30s]
    at org.elasticsearch.action.support.master.TransportMasterNodeOperationAction$3.onTimeout(TransportMasterNodeOperationAction.java:180)
    at org.elasticsearch.cluster.service.InternalClusterService$NotifyTimeout.run(InternalClusterService.java:491)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
    at java.lang.Thread.run(Unknown Source)