springboot集成elasticsearch时报错NoNodeAvailableException[None of the configured nodes are available: [{#

我在集成elasticsearch在idea的控制台里出现如下报错，但是我的配置是没有问题的

NoNodeAvailableException[None of the configured nodes are available: [{#transport#-1}{c86bxOiITCqF-lqJc2C-XQ}{localhost}{127.0.0.1:9300}]
]
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:347)
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:245)
    at org.elasticsearch.client.transport.TransportProxyClient.execute(TransportProxyClient.java:59)
    at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:366)
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:408)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:80)
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:54)

然后我在elasticsearch的控制台，看见如下错误

原来是我的elasticsearch是2.4.4版本太低了，我就换成5.2.0版本，问题解决