JanusGraph启动ES报错：Unable to determine Elasticsearch server version. Default to FIVE.

男娘i 2022-05-16 05:59 284阅读 0赞 
  1. 12:15:49 WARN  org.janusgraph.diskstorage.es.rest.RestElasticSearchClient 
  2.  - Unable to determine Elasticsearch server version. Default to FIVE.
  3. java.net.ConnectException: Connection refused
  4.     at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
  5.     at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
  6.     at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvent(DefaultConnectingIOReactor.java:171)
  7.     at org.apache.http.impl.nio.reactor.DefaultConnectingIOReactor.processEvents(DefaultConnectingIOReactor.java:145)
  8.     at org.apache.http.impl.nio.reactor.AbstractMultiworkerIOReactor.execute(AbstractMultiworkerIOReactor.java:348)
  9.     at org.apache.http.impl.nio.conn.PoolingNHttpClientConnectionManager.execute(PoolingNHttpClientConnectionManager.java:192)
  10.     at org.apache.http.impl.nio.client.CloseableHttpAsyncClientBase$1.run(CloseableHttpAsyncClientBase.java:64)
  11.     at java.lang.Thread.run(Thread.java:748)

原因：

1.es没有启动

2.我遇到的：janusgraph-cassandra-es-server.properties 中es的端口配置错误，配置文件中是9201，但es服务配置的是9200。

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