ElasticSearch AbstractMethodError在制作客户端时

Question

I am trying to make an elastic search transport client, but getting below error

Caused by: java.lang.AbstractMethodError: org.elasticsearch.transport.TcpTransport.sendMessage(Ljava/lang/Object;Lorg/elasticsearch/common/bytes/BytesReference;Ljava/lang/Runnable;)V at org.elasticsearch.transport.TcpTransport.internalSendMessage(TcpTransport.java:1111) at org.elasticsearch.transport.TcpTransport.sendRequestToChannel(TcpTransport.java:1093) at org.elasticsearch.transport.TcpTransport.executeHandshake(TcpTransport.java:1600)

Here is my code :

Settings settings = Settings.builder()
        .put("cluster.name", "elasticsearch")
        .put("node.name", "node1").build();

TransportClient client = new PreBuiltTransportClient(settings)
        .addTransportAddress(new InetSocketTransportAddress(InetAddress.getByName("localhost"), 9300));

Is this a dependency issue?

Answer 1

I got stuck on this. You can't mix dependency versions.

Turned out I was using spring-data-elasticsearch in one project that depended on another project that had the plain elasticsearch dependency. These included differing versions and caused that error.

That was not fun to track down.

Answer 2

It is a dependency issue. In maven pom, i have below dependencies

<dependency> 
   <groupId>org.elasticsearch</groupId> 
   <artifactId>elasticsearch</artifactId> 
   <version>5.6.2</version> 
</dependency> 
<dependency> 
   <groupId>org.elasticsearch.client</groupId>
   <artifactId>transport</artifactId>
   <version>5.6.3</version>
</dependency>

I have removed the dependency of org.elasticsearch, and it is running fine.