异常描述

1. 使用的SpringBoot1.5.9版本
2. JDK1.8
3. 使用了dubbo和zookeeper
4. elasticsearch使用的6.3.2版本
5. 引入ES的jar包

<dependency>
    <groupId>org.springframework.data</groupId>
    <artifactId>spring-data-elasticsearch</artifactId>
</dependency>

ES详细报错信息：

[2018-08-23T15:56:05,004][WARN ][o.e.x.s.t.n.SecurityNetty4ServerTransport] [node-1] exception caught on transport layer [NettyTcpChannel{localAddress=/192.168.1.40:9300, remoteAddress=/192.168.1.150:55594}], closing connection
java.lang.IllegalStateException: Received message from unsupported version: [2.0.0] minimal compatible version is: [5.6.0]
        at org.elasticsearch.transport.TcpTransport.ensureVersionCompatibility(TcpTransport.java:1462) ~[elasticsearch-6.3.2.jar:6.3.2]
        at org.elasticsearch.transport.TcpTransport.messageReceived(TcpTransport.java:1409) ~[elasticsearch-6.3.2.jar:6.3.2]
        at org.elasticsearch.transport.netty4.Netty4MessageChannelHandler.channelRead(Netty4MessageChannelHandler.java:64) ~[transport-netty4-6.3.2.jar:6.3.2]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:310) [netty-codec-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMessageDecoder.java:297) [netty-codec-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:413) [netty-codec-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265) [netty-codec-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:241) [netty-handler-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1359) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:935) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:134) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:645) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:545) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:499) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:459) [netty-transport-4.1.16.Final.jar:4.1.16.Final]
        at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:858) [netty-common-4.1.16.Final.jar:4.1.16.Final]
        at java.lang.Thread.run(Thread.java:748) [?:1.8.0_181]

异常分析

错误信息写的是因为版本不一致的原因导致的，客户端使用的2.0.0版本，要求最低是5.6.0版本的，然后各种百度各种查啊，原因如下：
springboot我用的版本是SpringBoot1.5.9，然后引入的spring-data-elasticsearch里面包含的es版本是2.4.0的。

解决办法

解决办法有两种，1：重新安装ES版本，安装2.0.0版本的。 2：升级自己的SpringBoot。
我这里因为是新系统，为了代码规范，所以就安装了ES2.0.0版本了，但是我感觉最好的解决办法应该要升级SpringBoot版本才对。