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I just checked on my end and as soon as I add the following in my pom.xml
file:
<dependency>
<groupId>org.elasticsearch.client</groupId>
<artifactId>transport</artifactId>
<version>5.0.2</version>
</dependency>
I can write this code:
new PreBuiltTransportClient(Settings.EMPTY)
.addTransportAddress(new InetSocketTransportAddress(new InetSocketAddress("127.0.0.1", 9300)));
If it does not work on your end, then check your IDE, your maven settings, look at eclipse messages.
What does mvn dependency:tree
is saying?