kotysa-coroutines-r2dbc example not working

[boojongmin-gm]

I cloned this repository and run kotysa-coroutines-r2dbc module. application throw exception like below.

Caused by: java.lang.NoClassDefFoundError: com/sample/USER (wrong name: com/sample/User)
    at java.base/java.lang.ClassLoader.defineClass1(Native Method) ~[na:na]
    at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1012) ~[na:na]
    at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:150) ~[na:na]
    at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:862) ~[na:na]
    at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:760) ~[na:na]
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:681) ~[na:na]
    at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:639) ~[na:na]
    at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:188) ~[na:na]
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:520) ~[na:na]
    at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
    at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3402) ~[na:na]
    at java.base/java.lang.Class.getDeclaredMethods(Class.java:2504) ~[na:na]
    at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.3.14.jar:5.3.14]
    ... 34 common frames omitted

thank you

[pull-vert]

Hello @boojongmin-gm ,thanks for the feedback

All Kotysa sample projects are independant gradle example projects, they are not sub-projects of Kotysa.

I just runned kotysa-coroutines-r2dbc sample and I had no error, I runned it on my Linux laptop with a JDK8 and a JDK17 to make sure.

What OS and JDK are you using, what gradle command di you execute to have this error ? Are you using my exact sample or did you changed something ? If so can you provide a Github reproduction repository ?

[boojongmin]

@pull-vert

thanks for your reply.

my environment is.

macbook pro M1 macos monterey

openjdk 17.0.2 2022-01-18 LTS
OpenJDK Runtime Environment Corretto-17.0.2.8.1 (build 17.0.2+8-LTS)
OpenJDK 64-Bit Server VM Corretto-17.0.2.8.1 (build 17.0.2+8-LTS, mixed mode, sharing)

------------------------------------------------------------
Gradle 7.3.3
------------------------------------------------------------

Build time:   2021-12-22 12:37:54 UTC
Revision:     6f556c80f945dc54b50e0be633da6c62dbe8dc71

Kotlin:       1.5.31
Groovy:       3.0.9
Ant:          Apache Ant(TM) version 1.10.11 compiled on July 10 2021
JVM:          17.0.2 (Amazon.com Inc. 17.0.2+8-LTS)
OS:           Mac OS X 12.1 aarch64

[boojongmin]

I try to change version to jdk 11 zulu and Gradle 6.9.2 but show same error message.

full error message

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'databaseInitializer' defined in file [/Users/bjm/dev/github/kotysa/samples/kotysa-coroutines-r2dbc/build/classes/kotlin/main/com/sample/DatabaseInitializer.class]: Unsatisfied dependency expressed through constructor parameter 0; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.sample.UserRepository] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:800) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.ConstructorResolver.autowireConstructor(ConstructorResolver.java:229) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.autowireConstructor(AbstractAutowireCapableBeanFactory.java:1372) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1222) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:953) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:918) ~[spring-context-5.3.14.jar:5.3.14]
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:583) ~[spring-context-5.3.14.jar:5.3.14]
        at org.springframework.boot.web.reactive.context.ReactiveWebServerApplicationContext.refresh(ReactiveWebServerApplicationContext.java:64) ~[spring-boot-2.6.2.jar:2.6.2]
        at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:730) ~[spring-boot-2.6.2.jar:2.6.2]
        at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:412) ~[spring-boot-2.6.2.jar:2.6.2]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:302) ~[spring-boot-2.6.2.jar:2.6.2]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1301) ~[spring-boot-2.6.2.jar:2.6.2]
        at org.springframework.boot.SpringApplication.run(SpringApplication.java:1290) ~[spring-boot-2.6.2.jar:2.6.2]
        at com.sample.AppKt.main(app.kt:13) ~[main/:na]
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'userRepository': Lookup method resolution failed; nested exception is java.lang.IllegalStateException: Failed to introspect Class [com.sample.UserRepository] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:289) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.determineConstructorsFromBeanPostProcessors(AbstractAutowireCapableBeanFactory.java:1302) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:1219) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:582) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:542) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.lambda$doGetBean$0(AbstractBeanFactory.java:335) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:234) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:333) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:208) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.config.DependencyDescriptor.resolveCandidate(DependencyDescriptor.java:276) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:1389) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:1309) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.ConstructorResolver.resolveAutowiredArgument(ConstructorResolver.java:887) ~[spring-beans-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:791) ~[spring-beans-5.3.14.jar:5.3.14]
        ... 19 common frames omitted
Caused by: java.lang.IllegalStateException: Failed to introspect Class [com.sample.UserRepository] from ClassLoader [jdk.internal.loader.ClassLoaders$AppClassLoader@277050dc]
        at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:481) ~[spring-core-5.3.14.jar:5.3.14]
        at org.springframework.util.ReflectionUtils.doWithLocalMethods(ReflectionUtils.java:321) ~[spring-core-5.3.14.jar:5.3.14]
        at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.determineCandidateConstructors(AutowiredAnnotationBeanPostProcessor.java:267) ~[spring-beans-5.3.14.jar:5.3.14]
        ... 32 common frames omitted
Caused by: java.lang.NoClassDefFoundError: com/sample/USER (wrong name: com/sample/User)
        at java.base/java.lang.ClassLoader.defineClass1(Native Method) ~[na:na]
        at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017) ~[na:na]
        at java.base/java.security.SecureClassLoader.defineClass(SecureClassLoader.java:174) ~[na:na]
        at java.base/jdk.internal.loader.BuiltinClassLoader.defineClass(BuiltinClassLoader.java:800) ~[na:na]
        at java.base/jdk.internal.loader.BuiltinClassLoader.findClassOnClassPathOrNull(BuiltinClassLoader.java:698) ~[na:na]
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClassOrNull(BuiltinClassLoader.java:621) ~[na:na]
        at java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:579) ~[na:na]
        at java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178) ~[na:na]
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522) ~[na:na]
        at java.base/java.lang.Class.getDeclaredMethods0(Native Method) ~[na:na]
        at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166) ~[na:na]
        at java.base/java.lang.Class.getDeclaredMethods(Class.java:2309) ~[na:na]
        at org.springframework.util.ReflectionUtils.getDeclaredMethods(ReflectionUtils.java:463) ~[spring-core-5.3.14.jar:5.3.14]
        ... 34 common frames omitted

[pull-vert]

@boojongmin thanks for these details

I just commited a change on this sample project, can you update and check if this commit fixes the problem ? I assumed that maybe declaring two classes with just difference in case (com/sample/USER and com/sample/User) could lead to this error on Mac OS, so I use distinct class names now.

Please give it a try and tell me if issue is fixed :)

[boojongmin]

@pull-vert

thank you. now, sample is working well. 👍

[pull-vert]

Nice, thanks @boojongmin