java.lang.ClassNotFoundException: List
at org.codehaus.plexus.classworlds.strategy.SelfFirstStrategy.loadClass(SelfFirstStrategy.java:50)
at org.codehaus.plexus.classworlds.realm.ClassRealm.unsynchronizedLoadClass(ClassRealm.java:271)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:247)
at org.codehaus.plexus.classworlds.realm.ClassRealm.loadClass(ClassRealm.java:239)
at io.swagger.util.ReflectionUtils.loadClassByName(ReflectionUtils.java:49)
at io.swagger.jackson.ModelResolver.getInnerType(ModelResolver.java:841)
at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:441)
at com.github.kongchen.swagger.docgen.reader.ModelModifier.resolve(ModelModifier.java:96)
at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:185)
at com.github.kongchen.swagger.docgen.reader.ModelModifier.resolve(ModelModifier.java:90)
at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:100)
at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:236)
at com.github.kongchen.swagger.docgen.reader.ModelModifier.resolve(ModelModifier.java:96)
at io.swagger.jackson.ModelResolver.resolve(ModelResolver.java:185)
at com.github.kongchen.swagger.docgen.reader.ModelModifier.resolve(ModelModifier.java:90)
at io.swagger.converter.ModelConverterContextImpl.resolve(ModelConverterContextImpl.java:100)
at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:161)
at io.swagger.jackson.ModelResolver.resolveProperty(ModelResolver.java:112)
at com.github.kongchen.swagger.docgen.reader.ModelModifier.resolveProperty(ModelModifier.java:76)
at io.swagger.converter.ModelConverterContextImpl.resolveProperty(ModelConverterContextImpl.java:80)
at io.swagger.converter.ModelConverters.readAsProperty(ModelConverters.java:58)
at com.github.kongchen.swagger.docgen.reader.AbstractReader.isPrimitive(AbstractReader.java:297)
at com.github.kongchen.swagger.docgen.reader.SpringMvcApiReader.parseMethod(SpringMvcApiReader.java:236)
at com.github.kongchen.swagger.docgen.reader.SpringMvcApiReader.read(SpringMvcApiReader.java:127)
at com.github.kongchen.swagger.docgen.reader.SpringMvcApiReader.read(SpringMvcApiReader.java:70)
at com.github.kongchen.swagger.docgen.AbstractDocumentSource.loadDocuments(AbstractDocumentSource.java:118)
at com.github.kongchen.swagger.docgen.mavenplugin.ApiDocumentMojo.execute(ApiDocumentMojo.java:96)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo(DefaultBuildPluginManager.java:137)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:210)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:156)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute(MojoExecutor.java:148)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject(LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build(SingleThreadedBuilder.java:56)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute(LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:305)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:192)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:105)
at org.apache.maven.cli.MavenCli.execute(MavenCli.java:957)
at org.apache.maven.cli.MavenCli.doMain(MavenCli.java:289)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:193)
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.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced(Launcher.java:282)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch(Launcher.java:225)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode(Launcher.java:406)
at org.codehaus.plexus.classworlds.launcher.Launcher.main(Launcher.java:347)
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 10.081 s
[INFO] Finished at: 2020-12-02T15:53:51+05:30
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal com.github.kongchen:swagger-maven-plugin:3.1.6:generate (default-cli) on project test-service: Unrecognized Type: [null] -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoExecutionException
Used this plugin in existing spring boot project, I used same plugin with non spring boot project and it's working perfect.
Plugin used in POM is as follows,
Error as follows,