# Cannot create a Transport Client in Java API

**URL:** <https://discuss.elastic.co/t/cannot-create-a-transport-client-in-java-api/1072>\
**Category:** Elasticsearch\
**Created:** [May 21, 2015, 9:57am UTC](https://discuss.elastic.co/t/cannot-create-a-transport-client-in-java-api/1072 "2015-05-21T09:57:53Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![Aymen\_Zaghouani](https://avatars.discourse-cdn.com/v4/letter/a/ecccb3/32.png) [@Aymen\_Zaghouani](https://discuss.elastic.co/u/Aymen_Zaghouani)\
**Post date:** [May 21, 2015, 9:57am UTC](https://discuss.elastic.co/t/cannot-create-a-transport-client-in-java-api/1072/1 "2015-05-21T09:57:53Z")

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I've recently started exploring the world of search, and am trying to use ES as the index for my MongoDB. I've managed to integrate them successfully, but I find the search API rather complex and confusing. The Java API is not too helpful either

I started by creating a Transport like this :

Settings settings = ImmutableSettings.settingsBuilder()  
.put("cluster.name", "elasticsearch").build();  
Client clientC = new TransportClient(settings)  
.addTransportAddress(new InetSocketTransportAddress("host-ip", 9300));

and I'm getting this error :

java.nio.channels.UnresolvedAddressException  
at sun.nio.ch.Net.checkAddress(Net.java:123)  
at sun.nio.ch.SocketChannelImpl.connect(SocketChannelImpl.java:621)  
at org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.connect(NioClientSocketPipelineSink.java:108)  
at org.elasticsearch.common.netty.channel.socket.nio.NioClientSocketPipelineSink.eventSunk(NioClientSocketPipelineSink.java:70)  
at org.elasticsearch.common.netty.channel.DefaultChannelPipeline.sendDownstream(DefaultChannelPipeline.java:574)  
at org.elasticsearch.common.netty.channel.Channels.connect(Channels.java:634)  
at org.elasticsearch.common.netty.channel.AbstractChannel.connect(AbstractChannel.java:216)  
at org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:229)  
at org.elasticsearch.common.netty.bootstrap.ClientBootstrap.connect(ClientBootstrap.java:182)  
at org.elasticsearch.transport.netty.NettyTransport.connectToChannelsLight(NettyTransport.java:759)  
at org.elasticsearch.transport.netty.NettyTransport.connectToNode(NettyTransport.java:727)  
at org.elasticsearch.transport.netty.NettyTransport.connectToNodeLight(NettyTransport.java:699)  
at org.elasticsearch.transport.TransportService.connectToNodeLight(TransportService.java:220)  
at org.elasticsearch.client.transport.TransportClientNodesService$SimpleNodeSampler.doSample(TransportClientNodesService.java:343)  
at org.elasticsearch.client.transport.TransportClientNodesService$NodeSampler.sample(TransportClientNodesService.java:289)  
at org.elasticsearch.client.transport.TransportClientNodesService.addTransportAddresses(TransportClientNodesService.java:172)  
at org.elasticsearch.client.transport.TransportClient.addTransportAddress(TransportClient.java:241)

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<div class="post-metadata">

**Author:** ![Jason\_Wee](https://avatars.discourse-cdn.com/v4/letter/j/7ea924/32.png) [@Jason\_Wee](https://discuss.elastic.co/u/Jason_Wee)\
**Post date:** [May 21, 2015, 1:13pm UTC](https://discuss.elastic.co/t/cannot-create-a-transport-client-in-java-api/1072/2 "2015-05-21T13:13:23Z")

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Looks like it has nothing to do with the java api, it just that host-ip cannot resolve to a valid ip, are you host-ip is resolvable by the machine that executed the client code?

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**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [July 6, 2017, 12:12am UTC](https://discuss.elastic.co/t/cannot-create-a-transport-client-in-java-api/1072/3 "2017-07-06T00:12:40Z")

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