解决elasticsearch client的maven中httpclient版本冲突的问题

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先抛问题，报错信息如下：

ClassNotFoundException: org.apache.http.conn.util.PublicSuffixMatcherLoader`java.lang.NoClassDefFoundError:` org/apache/http/conn/util/PublicSuffixMatcherLoader
	at org.apache.http.impl.nio.client.HttpAsyncClientBuilder.build(HttpAsyncClientBuilder.java:640)
	at org.elasticsearch.client.RestClientBuilder$2.run(RestClientBuilder.java:230)
	at org.elasticsearch.client.RestClientBuilder$2.run(RestClientBuilder.java:227)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.elasticsearch.client.RestClientBuilder.createHttpClient(RestClientBuilder.java:227)
	at org.elasticsearch.client.RestClientBuilder.access$000(RestClientBuilder.java:42)
	at org.elasticsearch.client.RestClientBuilder$1.run(RestClientBuilder.java:198)
	at org.elasticsearch.client.RestClientBuilder$1.run(RestClientBuilder.java:195)
	at java.security.AccessController.doPrivileged(Native Method)
	at org.elasticsearch.client.RestClientBuilder.build(RestClientBuilder.java:195)
	at com.wh.mobile.log.CustomerEsProduct.get(CustomerEsProduct.java:89)
	at com.wh.mobile.log.CustomerEsProduct.<init>(CustomerEsProduct.java:52)
	at com.wh.mobile.log.LogMain.logStart(LogMain.java:53)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:483)
	at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:65)
	at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
	at org.springframework.scheduling.concurrent.ReschedulingRunnable.run(ReschedulingRunnable.java:81)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.http.conn.util.PublicSuffixMatcherLoader
	at java.net.URLClassLoader$1.run(URLClassLoader.java:372)
	at java.net.URLClassLoader$1.run(URLClassLoader.java:361)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:360)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
	at org.springframework.boot.loader.LaunchedURLClassLoader.loadClass(LaunchedURLClassLoader.java:94)
	at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
	... 27 common frames omitted

问题背景：项目中的微服务引入一个日志模块，日志模块中引用了es-client

<dependency>
    <groupId>org.elasticsearch.client</groupId>
    <artifactId>elasticsearch-rest-client</artifactId>
    <version>6.4.2</version>
</dependency>

org.elasticsearch.client引用了

<dependency>
  <groupId>org.apache.httpcomponents</groupId>
  <artifactId>httpclient</artifactId>
  <version>4.5.2</version>
  <scope>compile</scope>

而项目中也引用了

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.5</version>
</dependency>

版本不一致，而且项目中引用的是低版本。这就是造成报错的原因，日志模块在使用httpclient时找不到指定依赖jar的类。

我的解决方案：

项目中的httpclient模块依赖

<dependency>
    <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.3.5</version>
</dependency>

修改为

<dependency>
   <groupId>org.apache.httpcomponents</groupId>
    <artifactId>httpclient</artifactId>
    <version>4.5.2</version>
</dependency>

保持和es-client中的一致，报错解决。