我正在尝试做this sample tutorial,以便熟悉elasticsearch.但是运行项目会在intellij中出现这个错误：

org.elasticsearch.transport.NodeDisconnectedException: [][127.0.0.1:9300][cluster:monitor/nodes/liveness] disconnected

2017-08-22 13:32:10.489 ERROR 6372 --- [           main] .d.e.r.s.AbstractElasticsearchRepository : Failed to load elasticsearch nodes : org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: [{#transport#-1}{127.0.0.1}{127.0.0.1:9300}]
2017-08-22 13:32:10.669  INFO 6372 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
--ElasticSearch-->
client.type = transport
cluster.name = mkyong-cluster
name = Mahkizmo
network.server = false
node.client = true
transport.ping_schedule = 5s
<--ElasticSearch--
2017-08-22 13:32:10.751  INFO 6372 --- [           main] utoConfigurationReportLoggingInitializer : 

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
2017-08-22 13:32:10.755 ERROR 6372 --- [           main] o.s.boot.SpringApplication               : Application startup Failed

java.lang.IllegalStateException: Failed to execute CommandLineRunner
    at org.springframework.boot.SpringApplication.callRunner(SpringApplication.java:779) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.callRunners(SpringApplication.java:760) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.afterRefresh(SpringApplication.java:747) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:315) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1162) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at org.springframework.boot.SpringApplication.run(SpringApplication.java:1151) [spring-boot-1.5.2.RELEASE.jar:1.5.2.RELEASE]
    at com.mkyong.Application.main(Application.java:26) [classes/:na]
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_92]
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_92]
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_92]
    at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_92]
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147) [idea_rt.jar:na]
Caused by: org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: [{#transport#-1}{127.0.0.1}{127.0.0.1:9300}]
    at org.elasticsearch.client.transport.TransportClientNodesService.ensureNodesAreAvailable(TransportClientNodesService.java:326) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.client.transport.TransportClientNodesService.execute(TransportClientNodesService.java:223) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.client.transport.support.TransportProxyClient.execute(TransportProxyClient.java:55) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.client.transport.TransportClient.doExecute(TransportClient.java:295) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.client.support.AbstractClient.execute(AbstractClient.java:359) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.action.ActionRequestBuilder.execute(ActionRequestBuilder.java:86) ~[elasticsearch-2.4.4.jar:2.4.4]
    at org.elasticsearch.act

并在elasticsearch.bat中它给出了这个错误：

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:1379) ~[elasticsearch-5.5.2.jar:5.5.2]
        at org.elasticsearch.transport.netty4.Netty4MessageChannelHandler.channe
lRead(Netty4MessageChannelHandler.java:74) ~[transport-netty4-5.5.2.jar:5.5.2]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(Abst
ractChannelHandlerContext.java:362) [netty-transport-4.1.11.Final.jar:4.1.11.Fin
al]
        at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(Abst
ractChannelHandlerContext.java:348) [netty-transport-4.1.11.Final.jar:4.1.11.Fin
al]
        at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(Abstra
ctChannelHandlerContext.java:340) [netty-transport-4.1.11.Final.jar:4.1.11.Final
]
        at io.netty.handler.codec.ByteToMessageDecoder.fireChannelRead(ByteToMes
sageDecoder.java:310) [netty-codec-4.1.11.Final.jar:4.1.11.Final]

我搜索过,据说春季启动和elasticsearch版本之间可能存在冲突.但是在该教程的pom文件中没有指定弹性搜索版本：