1

WebClient.builder().build() or WebClient.create

I get the below error. Any suggestions are much appreciated.

java.lang.NoClassDefFoundError: org/springframework/http/client/reactive/ClientHttpConnector

at org.springframework.web.reactive.function.client.WebClient.builder(WebClient.java:154)
at com.cooperlighting.iot.sample.SampleTest.resend_withSuccessful(SampleTest.java:38)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) 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.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 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$2.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:69) at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33) at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:220) at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:53) Caused by: java.lang.ClassNotFoundException: org.springframework.http.client.reactive.ClientHttpConnector at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581) at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521) ... 24 more

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7
  • I am trying to make a rest API call using WebClient , I am facing the above mentioned issue. Any suggestion are much appreciated. Commented May 3, 2021 at 15:55
  • try adding spring-boot-starter-web and try again. Commented May 3, 2021 at 15:58
  • @BishalGautam - Thanks for the suggestion. I tried it. It's till not working. Commented May 3, 2021 at 16:07
  • can you share your pom.xml @CodeLearn Commented May 3, 2021 at 16:10
  • @BishalGautam- sure. But It's too long. is there any other way I can send it to you Commented May 3, 2021 at 16:14

1 Answer 1

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2 
java.lang.NoClassDefFoundError

This usually occurs while there is no dependency attached for the given class. Try adding

 <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-webflux</artifactId> </dependency>

Also check for the jar files downloaded and trace it to the class name from the jars.

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