ClassNotFoundException:org.springframework.web.reactive.function.client.WebClient$Builder not found

[Anil Mishra]

Hi Community,

I'm trying to use spring webflux jar in my custom plugin, have added dependency in pom as well but getting class not found error during run time

Dependency

<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webflux</artifactId>
    <version>5.3.22</version>
    <scope>provided</scope>
</dependency>

Error--

Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.citi.cti.jiraptsintegration.service.PTSProjectWorkFlowValidator] from ClassLoader [com.citi.cti.cti_sdlc_jiraptsintegration [308]]
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:485)
at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:267)
... 29 more
Caused by: java.lang.NoClassDefFoundError: org/springframework/web/reactive/function/client/WebClient$Builder
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.getDeclaredMethods(Class.java:1975)
at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:467)
... 31 more
Caused by: java.lang.ClassNotFoundException: org.springframework.web.reactive.function.client.WebClient$Builder not found by com.citi.cti.cti_sdlc_jiraptsintegration [308]
at org.apache.felix.framework.BundleWiringImpl.findClassOrResourceByDelegation(BundleWiringImpl.java:1585)
at org.apache.felix.framework.BundleWiringImpl.access$300(BundleWiringImpl.java:79)
at org.apache.felix.framework.BundleWiringImpl$BundleClassLoader.loadClass(BundleWiringImpl.java:1970)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 35 more

[Anil Mishra · Accepted solution]

I was able to resolve this, the bean scope has to be compile and has to add spring bean dependency 

<dependency>
     <groupId>org.springframework</groupId>
     <artifactId>spring-beans</artifactId>
     <version>5.3.22</version>
     <scope>provided</scope>
 </dependency>
<dependency>
    <groupId>org.springframework</groupId>
    <artifactId>spring-webflux</artifactId>
    <version>5.3.22</version>
    <scope>compile</scope>
</dependency>