ElasticSearch,NoSuchMethodError

今天在学习elasticsearch中,用了新版本7.1.1.而各种教学视频和网站中,基本都是6.x版本.所以踩了坑
记录一个,用idea整合的时候,运行一个删除索引的test.结果报出以下错误

报错信息:

java.lang.BootstrapMethodError: java.lang.NoSuchMethodError: org.elasticsearch.action.support.master.AcknowledgedResponse.fromXContent(Lorg/elasticsearch/common/xcontent/XContentParser;)Lorg/elasticsearch/action/support/master/AcknowledgedResponse;

	at org.elasticsearch.client.IndicesClient.delete(IndicesClient.java:97)
	at com.xuecheng.search.testElasticSearch.testDeleIndex(testElasticSearch.java:39)
	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:498)
	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
	at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
	at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
	at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
	at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
	at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
	at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
	at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
	at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
	at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
	at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
	at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
	at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
	at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
	at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NoSuchMethodError: org.elasticsearch.action.support.master.AcknowledgedResponse.fromXContent(Lorg/elasticsearch/common/xcontent/XContentParser;)Lorg/elasticsearch/action/support/master/AcknowledgedResponse;
	at java.lang.invoke.MethodHandleNatives.resolve(Native Method)
	at java.lang.invoke.MemberName$Factory.resolve(MemberName.java:975)
	at java.lang.invoke.MemberName$Factory.resolveOrFail(MemberName.java:1000)
	at java.lang.invoke.MethodHandles$Lookup.resolveOrFail(MethodHandles.java:1394)
	at java.lang.invoke.MethodHandles$Lookup.linkMethodHandleConstant(MethodHandles.java:1750)
	at java.lang.invoke.MethodHandleNatives.linkMethodHandleConstant(MethodHandleNatives.java:477)
	... 32 more

问题关键

maven依赖引入问题.首先.下载elasticsearch版本要跟client依赖的maven版本对应(我这里都用的7.1.1)
然后再我刚开始选择依赖的时候,只加载了如下依赖,问题就出在这里,仔细查看依赖管理会发现,这个包里面依赖的elasticsearch是6.x版本.这就是报错的根本原因了!

<dependency>
    <groupId>org.elasticsearch.clientgroupId>
    <artifactId>elasticsearch-rest-high-level-clientartifactId>
    <version>7.1.1version>
dependency>

那么问题就非常好解决了.直接再加一个依赖就好了.

<dependency>
    <groupId>org.elasticsearchgroupId>
    <artifactId>elasticsearchartifactId>
    <version>7.1.1version>
dependency>

问题解决!!!

另外推荐两个很有帮助的博客
elasticsearch新版入门
https://blog.csdn.net/Zereao/article/details/89378283
elasticsearch教程–中文分词器作用和使用
https://blog.csdn.net/an88411980/article/details/83747230