问题
这几天尝试更换es客户端为 elasticsearch-rest-high-level-client，代码都写好了，单测跑起来，但是报错了，错误信息如下：
java.lang.NoSuchFieldError: FAIL_ON_SYMBOL_HASH_OVERFLOWat org.elasticsearch.common.xcontent.json.JsonXContent.<clinit>(JsonXContent.java:57)at org.elasticsearch.common.xcontent.XContentType$1.xContent(XContentType.java:56)at org.elasticsearch.common.xcontent.XContentHelper.toXContent(XContentHelper.java:344)at org.elasticsearch.common.xcontent.XContentHelper.toXContent(XContentHelper.java:335)at org.elasticsearch.client.RequestConverters.createEntity(RequestConverters.java:641)at org.elasticsearch.client.RequestConverters.update(RequestConverters.java:345)at org.elasticsearch.client.RestHighLevelClient$$Lambda$74/1046723947.apply(Unknown Source)at org.elasticsearch.client.RestHighLevelClient.internalPerformRequest(RestHighLevelClient.java:1589)at org.elasticsearch.client.RestHighLevelClient.performRequest(RestHighLevelClient.java:1563)at org.elasticsearch.client.RestHighLevelClient.performRequestAndParseEntity(RestHighLevelClient.java:1525)at org.elasticsearch.client.RestHighLevelClient.update(RestHighLevelClient.java:894)atat 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.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:80)at org.testng.internal.MethodInvocationHelper$1.runTestMethod(MethodInvocationHelper.java:182)at org.springframework.test.context.testng.AbstractTestNGSpringContextTests.run(AbstractTestNGSpringContextTests.java:171)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.testng.internal.MethodInvocationHelper.invokeHookable(MethodInvocationHelper.java:194)at org.testng.internal.Invoker.invokeMethod(Invoker.java:707)at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)at org.testng.TestRunner.privateRun(TestRunner.java:767)at org.testng.TestRunner.run(TestRunner.java:617)at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:329)at org.testng.SuiteRunner.privateRun(SuiteRunner.java:291)at org.testng.SuiteRunner.run(SuiteRunner.java:240)at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86)at org.testng.TestNG.runSuitesSequentially(TestNG.java:1198)at org.testng.TestNG.runSuitesLocally(TestNG.java:1123)at org.testng.TestNG.run(TestNG.java:1031)at org.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:72)at org.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:123)我的es版本信息为：6.5.4
解决问题
看了网上的很多博客信息，大致意思就是jackson 版本冲突，引入了低版本的jackson，导致了es需要的一些东西找不到，于是开始了排除jar包，用命令：
mvn dependency:tree -Dverbose > tree.log
来看下jar包依赖情况，只保留es自带的jackson，其他全部排掉，在pom中排掉：
<exclusions><exclusion><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId></exclusion>
</exclusions>
然后再次启动，还是报错，后面把es中的jackson 也排掉了，重新引入一个一模一样版本号的jackson：
<dependency><groupId>com.fasterxml.jackson.core</groupId><artifactId>jackson-core</artifactId><version>2.8.11</version></dependency>
运行单测，没有报错信息，并且es中的字段也确实被修改了。
参考博客
elastictsearch报错java.lang.NoSuchFieldError: FAIL_ON_SYMBOL_HASH_OVERFLOW