ElasticSearch 搜索时遇到的问题

NoNodeAvailableException[None of the configured nodes were available: [{xxxx_node}{-v_xxxxx}{xxxx}{xxxx/xxxx:9300}]
]; nested: NodeDisconnectedException[[xxxx_node]xxxx/xxxx:9300][indices:data/read/search] disconnected];
at org.elasticsearch.client.transport.TransportClientNodesService$RetryListener.onFailure(TransportClientNodesService.java:244)
at org.elasticsearch.action.ActionListenerResponseHandler.handleException(ActionListenerResponseHandler.java:46)
at org.elasticsearch.transport.TransportService$Adapter$3.run(TransportService.java:622)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:724)
Caused by: NodeDisconnectedException[[xxxx_node][xxxx/xxxx:9300][indices:data/read/search] disconnected]