1） 端口错
client = new TransportClient().addTransportAddress(new InetSocketTransportAddress(ipAddress, 9300));
这里9300 写成9200的话会No node available
要是你连的不是本机，注意IP有没有正确
2 ）jar报引用版本不匹配，开启的服务是什么版本，引用的jar最好匹配（这个我没有去试，反正我的是匹配的）
3） 要是你改了集群名字，还有设置集群名字
Settings settings = ImmutableSettings.settingsBuilder().put("cluster.name", "xxx").build();
client = new TransportClient(settings).addTransportAddress(new InetSocketTransportAddress(ipAddress, 9300));
http://itindex.net/detail/51176-elasticsearch-%E9%97%AE%E9%A2%98-%E6%96%B9%E6%B3%95
es服务器版本和java客户端中版本不一致：
[2016-11-19T10:47:59,587][WARN ][o.e.t.n.Netty4Transport ] [6bUq_zG] exception caught on transport layer [[id: 0xa414ba35, L:/127.0.0.1:9300 - R:/127.0.0.1:52861]], closing connection
java.lang.IllegalStateException: Received message from unsupported version: [2.0.0] minimal compatible version is: [5.0.0]
at org.elasticsearch.transport.TcpTransport.messageReceived(TcpTransport.java:1199) ~[elasticsearch-5.0.1.jar:5.0.1]
at org.elasticsearch.transport.netty4.Netty4MessageChannelHandler.channelRead(Netty4MessageChannelHandler.java:74) ~[transport-netty4-5.0.1.jar:5.0.1]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:293) [netty-codec-4.1.5.Final.jar:4.1.5.Final]
at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:280) [netty-codec-4.1.5.Final.jar:4.1.5.Final]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:396) [netty-codec-4.1.5.Final.jar:4.1.5.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:248) [netty-codec-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.ChannelInboundHandlerAdapter.channelRead(ChannelInboundHandlerAdapter.java:86) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:350) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1334) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:372) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:358) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:926) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:129) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:610) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:513) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:467) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:437) [netty-transport-4.1.5.Final.jar:4.1.5.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:873) [netty-common-4.1.5.Final.jar:4.1.5.Final]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_60]
