Loading non-bean instance to spring context, due to custom repository configuration.

[jbw9964]

Hello.

I was practicing spring-data-jpa, and I faced weird errors.

• Question on StackOverflow

• Error 1 : Circular dependency while there isn't

• Error 2 : Loading non-bean instance to spring context

It seems both errors are caused by Custom repository (spring doc) autoconfiguration.

[Err 1] can be minor problem, but [Err 2] seems critical.

Error 1 - Circular dependency while there isn't

Source code :

1. Entity

   @Entity
   public class TestEntity {
   
       @Id
       private Long id;
   }

2. JPA interface

   public interface AAA
           extends JpaRepository<TestEntity, Long> {
   
   }

3. Repository implementation

   @Repository
   public class AAAImpl {
   
       @Autowired
       private AAA jpaRepo;
   }

Error in console :

/Users/jeongjunsang/Library/Java/JavaVirtualMachines/jbr-17.0.12/Contents/Home/bin/java -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -Dmanagement.endpoints.jmx.exposure.include=* -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=65462:/Applications/IntelliJ IDEA.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Users/jeongjunsang/Desktop/Coding/testing/build/classes/java/main:/Users/jeongjunsang/Desktop/Coding/testing/build/resources/main:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-data-jpa/3.3.4/60df2a5bea8752fb215f3c8e1dffeb3554773a49/spring-boot-starter-data-jpa-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-aop/3.3.4/4e0fef42facab9dbdbc7784dc4fb7698bf1c6b49/spring-boot-starter-aop-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-jdbc/3.3.4/b6bc324d5af04af752a6f3e44ea8e4cd96b28343/spring-boot-starter-jdbc-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.hibernate.orm/hibernate-core/6.5.3.Final/1e23c320a5d10f5eaecbd23095fca5c5c83c1fb5/hibernate-core-6.5.3.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.data/spring-data-jpa/3.3.4/f92296e4b6d18f5f79c5e6074da96bf0de2006d3/spring-data-jpa-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-aspects/6.1.13/d606215f2876e8a3ed1945db5adfbb76a7e3f0e7/spring-aspects-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter/3.3.4/f02312a6816fb439a55d2920b9af8f0f8abf5bac/spring-boot-starter-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-aop/6.1.13/ad2c631e1717fdc6d91d56c06d4fd61e0215c19a/spring-aop-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.aspectj/aspectjweaver/1.9.22.1/bca243d0af0db4758fbae45c5f4995cb5dabb612/aspectjweaver-1.9.22.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.zaxxer/HikariCP/5.1.0/8c96e36c14461fc436bb02b264b96ef3ca5dca8c/HikariCP-5.1.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-jdbc/6.1.13/11811219be3452cfd989c57d3de4529f6927352f/spring-jdbc-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.persistence/jakarta.persistence-api/3.1.0/66901fa1c373c6aff65c13791cc11da72060a8d6/jakarta.persistence-api-3.1.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.transaction/jakarta.transaction-api/2.0.1/51a520e3fae406abb84e2e1148e6746ce3f80a1a/jakarta.transaction-api-2.0.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-context/6.1.13/d5163ddae069c5d78c841cd3a60c4db25bf16401/spring-context-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-orm/6.1.13/68093388cd8fca9ad2731e63bfb8de3f2604474/spring-orm-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.data/spring-data-commons/3.3.4/f0f6bca5b0cd7d318666e2d3f02726c615334678/spring-data-commons-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-tx/6.1.13/ed041ecf9a5f480e1b11d0b58a06d8034ff8cfea/spring-tx-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-beans/6.1.13/90bbee6278b46b145e64e5ae29316bdd459c6826/spring-beans-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-core/6.1.13/ddbd765408d2665f47017c8f05a7682012f91da3/spring-core-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.antlr/antlr4-runtime/4.13.0/5a02e48521624faaf5ff4d99afc88b01686af655/antlr4-runtime-4.13.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.annotation/jakarta.annotation-api/2.1.1/48b9bda22b091b1f48b13af03fe36db3be6e1ae3/jakarta.annotation-api-2.1.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-api/2.0.16/172931663a09a1fa515567af5fbef00897d3c04/slf4j-api-2.0.16.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-autoconfigure/3.3.4/979234a0f3035fe60d5e505018789f98a7ec7ee3/spring-boot-autoconfigure-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot/3.3.4/f06c6950aa5766b63328e821641f5c7d71be819d/spring-boot-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-logging/3.3.4/c83073c0f5574b2146695ab716bcef3d6baa45e6/spring-boot-starter-logging-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/2.2/3af797a25458550a16bf89acc8e4ab2b7f2bfce0/snakeyaml-2.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-expression/6.1.13/be30254712ca0549cbd539ba05c57064917253f3/spring-expression-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.micrometer/micrometer-observation/1.13.4/2673c9b181ab2512002b23b7ad0f1dd02212696c/micrometer-observation-1.13.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-jcl/6.1.13/37291ff008a66a9dbf2c98e11bd468cfadaa7ebc/spring-jcl-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-classic/1.5.8/229bb1ef6b14dfbf74ff443af9097d836dc5f0dd/logback-classic-1.5.8.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-to-slf4j/2.23.1/425ad1eb8a39904d2830e907a324e956fb456520/log4j-to-slf4j-2.23.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.slf4j/jul-to-slf4j/2.0.16/6d57da3e961daac65bcca0dd3def6cd11e48a24a/jul-to-slf4j-2.0.16.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.micrometer/micrometer-commons/1.13.4/edcf69518a4c382c48e19c7fb7d4aedfb115c0c3/micrometer-commons-1.13.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-core/1.5.8/3fce599197de3b6f387cc9bee412ead2b4994a46/logback-core-1.5.8.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-api/2.23.1/9c15c29c526d9c6783049c0a77722693c66706e1/log4j-api-2.23.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.mysql/mysql-connector-j/8.3.0/1cc7fa5d61f4bbc113531a4ba6d85d41cf3d57e1/mysql-connector-j-8.3.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.jboss.logging/jboss-logging/3.5.3.Final/c88fc1d8a96d4c3491f55d4317458ccad53ca663/jboss-logging-3.5.3.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.hibernate.common/hibernate-commons-annotations/6.0.6.Final/77a5f94b56d49508e0ee334751db5b78e5ccd50c/hibernate-commons-annotations-6.0.6.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.smallrye/jandex/3.1.2/a6c1c89925c7df06242b03dddb353116ceb9584c/jandex-3.1.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.fasterxml/classmate/1.7.0/e98374da1f2143ac8e6e0a95036994bb19137a3/classmate-1.7.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/net.bytebuddy/byte-buddy/1.14.19/4c0c637b8f47dc08f89240e6f59900011752c97b/byte-buddy-1.14.19.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-runtime/4.0.5/ca84c2a7169b5293e232b9d00d1e4e36d4c3914a/jaxb-runtime-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.xml.bind/jakarta.xml.bind-api/4.0.2/6cd5a999b834b63238005b7144136379dc36cad2/jakarta.xml.bind-api-4.0.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.inject/jakarta.inject-api/2.0.1/4c28afe1991a941d7702fe1362c365f0a8641d1e/jakarta.inject-api-2.0.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-core/4.0.5/7b4b11ea5542eea4ad55e1080b23be436795b3/jaxb-core-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.activation/jakarta.activation-api/2.1.3/fa165bd70cda600368eee31555222776a46b881f/jakarta.activation-api-2.1.3.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.eclipse.angus/angus-activation/2.0.2/41f1e0ddd157c856926ed149ab837d110955a9fc/angus-activation-2.0.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/txw2/4.0.5/f36a4ef12120a9bb06d766d6a0e54b144fd7ed98/txw2-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.sun.istack/istack-commons-runtime/4.1.2/18ec117c85f3ba0ac65409136afa8e42bc74e739/istack-commons-runtime-4.1.2.jar core.testing.TestingApplication

  .   ____          _            __ _ _
 /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
 \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  '  |____| .__|_| |_|_| |_\__, | / / / /
 =========|_|==============|___/=/_/_/_/

 :: Spring Boot ::                (v3.3.4)

2024-11-08T15:26:51.053+09:00  INFO 60520 --- [testing] [           main] core.testing.TestingApplication          : Starting TestingApplication using Java 17.0.12 with PID 60520 (/Users/jeongjunsang/Desktop/Coding/testing/build/classes/java/main started by jeongjunsang in /Users/jeongjunsang/Desktop/Coding/testing)
2024-11-08T15:26:51.056+09:00  INFO 60520 --- [testing] [           main] core.testing.TestingApplication          : No active profile set, falling back to 1 default profile: "default"
2024-11-08T15:26:51.519+09:00  INFO 60520 --- [testing] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
2024-11-08T15:26:51.554+09:00  INFO 60520 --- [testing] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 29 ms. Found 1 JPA repository interface.
2024-11-08T15:26:51.912+09:00  INFO 60520 --- [testing] [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
2024-11-08T15:26:51.976+09:00  INFO 60520 --- [testing] [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 6.5.3.Final
2024-11-08T15:26:52.015+09:00  INFO 60520 --- [testing] [           main] o.h.c.internal.RegionFactoryInitiator    : HHH000026: Second-level cache disabled
2024-11-08T15:26:52.232+09:00  INFO 60520 --- [testing] [           main] o.s.o.j.p.SpringPersistenceUnitInfo      : No LoadTimeWeaver setup: ignoring JPA class transformer
2024-11-08T15:26:52.248+09:00  INFO 60520 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
2024-11-08T15:26:52.497+09:00  INFO 60520 --- [testing] [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection com.mysql.cj.jdbc.ConnectionImpl@1068176
2024-11-08T15:26:52.498+09:00  INFO 60520 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
2024-11-08T15:26:52.543+09:00  WARN 60520 --- [testing] [           main] org.hibernate.orm.deprecation            : HHH90000025: MySQLDialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)
2024-11-08T15:26:52.935+09:00  INFO 60520 --- [testing] [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
2024-11-08T15:26:52.986+09:00  INFO 60520 --- [testing] [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2024-11-08T15:26:52.990+09:00  WARN 60520 --- [testing] [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'AAAImpl': Unsatisfied dependency expressed through field 'jpaRepo': Error creating bean with name 'AAAImpl': Requested bean is currently in creation: Is there an unresolvable circular reference?
2024-11-08T15:26:52.990+09:00  INFO 60520 --- [testing] [           main] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
2024-11-08T15:26:52.992+09:00  INFO 60520 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
2024-11-08T15:26:53.011+09:00  INFO 60520 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
2024-11-08T15:26:53.017+09:00  INFO 60520 --- [testing] [           main] .s.b.a.l.ConditionEvaluationReportLogger : 

Error starting ApplicationContext. To display the condition evaluation report re-run your application with 'debug' enabled.
2024-11-08T15:26:53.029+09:00 ERROR 60520 --- [testing] [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

***************************
APPLICATION FAILED TO START
***************************

Description:

The dependencies of some of the beans in the application context form a cycle:

┌──->──┐
|  AAAImpl (field private core.testing.AAA core.testing.AAAImpl.jpaRepo)
└──<-──┘


Action:

Relying upon circular references is discouraged and they are prohibited by default. Update your application to remove the dependency cycle between beans. As a last resort, it may be possible to break the cycle automatically by setting spring.main.allow-circular-references to true.


Process finished with exit code 1

In console, it says AAAImpl has a cycle to itself.

@Repository
public class AAAImpl {

    @Autowired
    private AAA jpaRepo;
}

But in source code there isn't. It only injects jpa interface (AAA).

Error 2 - Loading non-bean instance to spring context

Source code :

1. JPA interface

   public interface AAA
           extends JpaRepository<TestEntity, Long> {
   
   }

2. Non-bean class

   //@Repository         // removed annotation
   public class AAAImpl {
   
   //    @Autowired      // and dependencies
   //    private AAA jpaRepo;
   }

Check instances were loaded to spring context :

1. Pull beans in spring context

   @SpringBootApplication
   public class TestingApplication {
   
       public static void main(String[] args) {
           ConfigurableApplicationContext context
                   = SpringApplication.run(TestingApplication.class, args);
   
           System.out.println("JPA interface : ");
           AAA jpaRepo = context.getBean(AAA.class);
           showProperties(jpaRepo);
   
           System.out.println("\nImpl : ");
           AAAImpl impl = context.getBean(AAAImpl.class);
           showProperties(impl);
       }
   
       private static void showProperties(Object o)    {
           System.out.println("As string\t\t\t\t\t: " + o.toString());
           System.out.println("Class\t\t\t\t\t\t\t: " + o.getClass());
           System.out.println("Name\t\t\t\t\t\t\t: " + o.getClass().getSimpleName());
           System.out.printf("IdentityHashcode\t: 0x%08x\n", System.identityHashCode(o));
       }
   }

2. Console output

   /Users/jeongjunsang/Library/Java/JavaVirtualMachines/jbr-17.0.12/Contents/Home/bin/java -XX:TieredStopAtLevel=1 -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dspring.jmx.enabled=true -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true -Dmanagement.endpoints.jmx.exposure.include=* -javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=50240:/Applications/IntelliJ IDEA.app/Contents/bin -Dfile.encoding=UTF-8 -classpath /Users/jeongjunsang/Desktop/Coding/testing/build/classes/java/main:/Users/jeongjunsang/Desktop/Coding/testing/build/resources/main:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-data-jpa/3.3.4/60df2a5bea8752fb215f3c8e1dffeb3554773a49/spring-boot-starter-data-jpa-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-aop/3.3.4/4e0fef42facab9dbdbc7784dc4fb7698bf1c6b49/spring-boot-starter-aop-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-jdbc/3.3.4/b6bc324d5af04af752a6f3e44ea8e4cd96b28343/spring-boot-starter-jdbc-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.hibernate.orm/hibernate-core/6.5.3.Final/1e23c320a5d10f5eaecbd23095fca5c5c83c1fb5/hibernate-core-6.5.3.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.data/spring-data-jpa/3.3.4/f92296e4b6d18f5f79c5e6074da96bf0de2006d3/spring-data-jpa-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-aspects/6.1.13/d606215f2876e8a3ed1945db5adfbb76a7e3f0e7/spring-aspects-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter/3.3.4/f02312a6816fb439a55d2920b9af8f0f8abf5bac/spring-boot-starter-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-aop/6.1.13/ad2c631e1717fdc6d91d56c06d4fd61e0215c19a/spring-aop-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.aspectj/aspectjweaver/1.9.22.1/bca243d0af0db4758fbae45c5f4995cb5dabb612/aspectjweaver-1.9.22.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.zaxxer/HikariCP/5.1.0/8c96e36c14461fc436bb02b264b96ef3ca5dca8c/HikariCP-5.1.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-jdbc/6.1.13/11811219be3452cfd989c57d3de4529f6927352f/spring-jdbc-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.persistence/jakarta.persistence-api/3.1.0/66901fa1c373c6aff65c13791cc11da72060a8d6/jakarta.persistence-api-3.1.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.transaction/jakarta.transaction-api/2.0.1/51a520e3fae406abb84e2e1148e6746ce3f80a1a/jakarta.transaction-api-2.0.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-context/6.1.13/d5163ddae069c5d78c841cd3a60c4db25bf16401/spring-context-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-orm/6.1.13/68093388cd8fca9ad2731e63bfb8de3f2604474/spring-orm-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.data/spring-data-commons/3.3.4/f0f6bca5b0cd7d318666e2d3f02726c615334678/spring-data-commons-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-tx/6.1.13/ed041ecf9a5f480e1b11d0b58a06d8034ff8cfea/spring-tx-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-beans/6.1.13/90bbee6278b46b145e64e5ae29316bdd459c6826/spring-beans-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-core/6.1.13/ddbd765408d2665f47017c8f05a7682012f91da3/spring-core-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.antlr/antlr4-runtime/4.13.0/5a02e48521624faaf5ff4d99afc88b01686af655/antlr4-runtime-4.13.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.annotation/jakarta.annotation-api/2.1.1/48b9bda22b091b1f48b13af03fe36db3be6e1ae3/jakarta.annotation-api-2.1.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.slf4j/slf4j-api/2.0.16/172931663a09a1fa515567af5fbef00897d3c04/slf4j-api-2.0.16.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-autoconfigure/3.3.4/979234a0f3035fe60d5e505018789f98a7ec7ee3/spring-boot-autoconfigure-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot/3.3.4/f06c6950aa5766b63328e821641f5c7d71be819d/spring-boot-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework.boot/spring-boot-starter-logging/3.3.4/c83073c0f5574b2146695ab716bcef3d6baa45e6/spring-boot-starter-logging-3.3.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.yaml/snakeyaml/2.2/3af797a25458550a16bf89acc8e4ab2b7f2bfce0/snakeyaml-2.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-expression/6.1.13/be30254712ca0549cbd539ba05c57064917253f3/spring-expression-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.micrometer/micrometer-observation/1.13.4/2673c9b181ab2512002b23b7ad0f1dd02212696c/micrometer-observation-1.13.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.springframework/spring-jcl/6.1.13/37291ff008a66a9dbf2c98e11bd468cfadaa7ebc/spring-jcl-6.1.13.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-classic/1.5.8/229bb1ef6b14dfbf74ff443af9097d836dc5f0dd/logback-classic-1.5.8.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-to-slf4j/2.23.1/425ad1eb8a39904d2830e907a324e956fb456520/log4j-to-slf4j-2.23.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.slf4j/jul-to-slf4j/2.0.16/6d57da3e961daac65bcca0dd3def6cd11e48a24a/jul-to-slf4j-2.0.16.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.micrometer/micrometer-commons/1.13.4/edcf69518a4c382c48e19c7fb7d4aedfb115c0c3/micrometer-commons-1.13.4.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/ch.qos.logback/logback-core/1.5.8/3fce599197de3b6f387cc9bee412ead2b4994a46/logback-core-1.5.8.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.apache.logging.log4j/log4j-api/2.23.1/9c15c29c526d9c6783049c0a77722693c66706e1/log4j-api-2.23.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.mysql/mysql-connector-j/8.3.0/1cc7fa5d61f4bbc113531a4ba6d85d41cf3d57e1/mysql-connector-j-8.3.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.jboss.logging/jboss-logging/3.5.3.Final/c88fc1d8a96d4c3491f55d4317458ccad53ca663/jboss-logging-3.5.3.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.hibernate.common/hibernate-commons-annotations/6.0.6.Final/77a5f94b56d49508e0ee334751db5b78e5ccd50c/hibernate-commons-annotations-6.0.6.Final.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/io.smallrye/jandex/3.1.2/a6c1c89925c7df06242b03dddb353116ceb9584c/jandex-3.1.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.fasterxml/classmate/1.7.0/e98374da1f2143ac8e6e0a95036994bb19137a3/classmate-1.7.0.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/net.bytebuddy/byte-buddy/1.14.19/4c0c637b8f47dc08f89240e6f59900011752c97b/byte-buddy-1.14.19.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-runtime/4.0.5/ca84c2a7169b5293e232b9d00d1e4e36d4c3914a/jaxb-runtime-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.xml.bind/jakarta.xml.bind-api/4.0.2/6cd5a999b834b63238005b7144136379dc36cad2/jakarta.xml.bind-api-4.0.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.inject/jakarta.inject-api/2.0.1/4c28afe1991a941d7702fe1362c365f0a8641d1e/jakarta.inject-api-2.0.1.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/jaxb-core/4.0.5/7b4b11ea5542eea4ad55e1080b23be436795b3/jaxb-core-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/jakarta.activation/jakarta.activation-api/2.1.3/fa165bd70cda600368eee31555222776a46b881f/jakarta.activation-api-2.1.3.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.eclipse.angus/angus-activation/2.0.2/41f1e0ddd157c856926ed149ab837d110955a9fc/angus-activation-2.0.2.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/org.glassfish.jaxb/txw2/4.0.5/f36a4ef12120a9bb06d766d6a0e54b144fd7ed98/txw2-4.0.5.jar:/Users/jeongjunsang/.gradle/caches/modules-2/files-2.1/com.sun.istack/istack-commons-runtime/4.1.2/18ec117c85f3ba0ac65409136afa8e42bc74e739/istack-commons-runtime-4.1.2.jar core.testing.TestingApplication
   
     .   ____          _            __ _ _
    /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
   ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
    \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
     '  |____| .__|_| |_|_| |_\__, | / / / /
    =========|_|==============|___/=/_/_/_/
   
    :: Spring Boot ::                (v3.3.4)
   
   2024-11-08T16:30:15.244+09:00  INFO 61652 --- [testing] [           main] core.testing.TestingApplication          : Starting TestingApplication using Java 17.0.12 with PID 61652 (/Users/jeongjunsang/Desktop/Coding/testing/build/classes/java/main started by jeongjunsang in /Users/jeongjunsang/Desktop/Coding/testing)
   2024-11-08T16:30:15.246+09:00  INFO 61652 --- [testing] [           main] core.testing.TestingApplication          : No active profile set, falling back to 1 default profile: "default"
   2024-11-08T16:30:15.442+09:00  INFO 61652 --- [testing] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Bootstrapping Spring Data JPA repositories in DEFAULT mode.
   2024-11-08T16:30:15.464+09:00  INFO 61652 --- [testing] [           main] .s.d.r.c.RepositoryConfigurationDelegate : Finished Spring Data repository scanning in 18 ms. Found 1 JPA repository interface.
   2024-11-08T16:30:15.609+09:00  INFO 61652 --- [testing] [           main] o.hibernate.jpa.internal.util.LogHelper  : HHH000204: Processing PersistenceUnitInfo [name: default]
   2024-11-08T16:30:15.635+09:00  INFO 61652 --- [testing] [           main] org.hibernate.Version                    : HHH000412: Hibernate ORM core version 6.5.3.Final
   2024-11-08T16:30:15.650+09:00  INFO 61652 --- [testing] [           main] o.h.c.internal.RegionFactoryInitiator    : HHH000026: Second-level cache disabled
   2024-11-08T16:30:15.791+09:00  INFO 61652 --- [testing] [           main] o.s.o.j.p.SpringPersistenceUnitInfo      : No LoadTimeWeaver setup: ignoring JPA class transformer
   2024-11-08T16:30:15.803+09:00  INFO 61652 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Starting...
   2024-11-08T16:30:16.022+09:00  INFO 61652 --- [testing] [           main] com.zaxxer.hikari.pool.HikariPool        : HikariPool-1 - Added connection com.mysql.cj.jdbc.ConnectionImpl@9b3be1c
   2024-11-08T16:30:16.023+09:00  INFO 61652 --- [testing] [           main] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Start completed.
   2024-11-08T16:30:16.062+09:00  WARN 61652 --- [testing] [           main] org.hibernate.orm.deprecation            : HHH90000025: MySQLDialect does not need to be specified explicitly using 'hibernate.dialect' (remove the property setting and it will be selected by default)
   2024-11-08T16:30:16.402+09:00  INFO 61652 --- [testing] [           main] o.h.e.t.j.p.i.JtaPlatformInitiator       : HHH000489: No JTA platform available (set 'hibernate.transaction.jta.platform' to enable JTA platform integration)
   2024-11-08T16:30:16.442+09:00  INFO 61652 --- [testing] [           main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
   2024-11-08T16:30:16.578+09:00  INFO 61652 --- [testing] [           main] core.testing.TestingApplication          : Started TestingApplication in 1.493 seconds (process running for 1.901)
   
   JPA interface : 
   As string			: core.testing.AAAImpl@6bd2f039
   Class				: class jdk.proxy2.$Proxy96
   Name				: $Proxy96
   IdentityHashcode	: 0x4c3d72fd
   
   Impl : 
   As string			: core.testing.AAAImpl@6bd2f039
   Class				: class core.testing.AAAImpl
   Name				: AAAImpl
   IdentityHashcode	: 0x6bd2f039
   
   2024-11-08T16:30:16.583+09:00  INFO 61652 --- [testing] [ionShutdownHook] j.LocalContainerEntityManagerFactoryBean : Closing JPA EntityManagerFactory for persistence unit 'default'
   2024-11-08T16:30:16.585+09:00  INFO 61652 --- [testing] [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown initiated...
   2024-11-08T16:30:16.589+09:00  INFO 61652 --- [testing] [ionShutdownHook] com.zaxxer.hikari.HikariDataSource       : HikariPool-1 - Shutdown completed.
   
   Process finished with exit code 0
   
   

A class AAImpl has no relation with spring. It's just a random class like DTO, so it never should be loaded to spring context.

But in console output, AAAImpl were loaded to context.

bleApplicationContext context
        = SpringApplication.run(TestingApplication.class, args);

System.out.println("JPA interface : ");
AAA jpaRepo = context.getBean(AAA.class);
showProperties(jpaRepo);

System.out.println("\nImpl : ");
AAAImpl impl = context.getBean(AAAImpl.class);
showProperties(impl);

JPA interface : 
As string               : core.testing.AAAImpl@6bd2f039
Class			: class jdk.proxy2.$Proxy96
Name			: $Proxy96
IdentityHashcode	: 0x4c3d72fd

Impl : 
As string               : core.testing.AAAImpl@6bd2f039
Class			: class core.testing.AAAImpl
Name			: AAAImpl
IdentityHashcode	: 0x6bd2f039

---

I've debug related packages, and I think it's caused by custom repository candidate selection.
Here's more details about my opinion. link

Both are reproducible on this repo (main).

• circular-dependency-error branch
• non-bean-class-loaded-error branch

Thank you all.

[christophstrobl]

I need to have a closer look. From a quick glance this looks like backwards compatibility with 1.x is kicking in.
Back then, in 2015 (or so), custom repository definitions had to be declared differently. The implementation of the custom interface had to be the actual repository name + a configured suffix. I Outlined that below - mind the UserRepositoryImpl.

interface UserRepositoryCustom {
  public void someCustomMethod(User user);
}


class UserRepositoryImpl implements UserRepositoryCustom {

  public void someCustomMethod(User user) {
    // ...
  }
}

interface UserRepository extends CrudRepository<User, Long>, UserRepositoryCustom { }

Have you tried a different naming schema or customizing EnableJpaRepositories#repositoryImplementationPostfix?

[jbw9964]

Have you tried a different naming schema or customizing EnableJpaRepositories#repositoryImplementationPostfix?

Yes.

Different naming schema & annotating @EnableJpaRepositories(repositoryImplementationPostfix = "...") fixes the problem.
And also using @NoRepositoryBean solves [Err 2] too.

However, I would like something to be done since it can lead confusion on user's point of view.

[christophstrobl]

Thanks for response - let me take it to the team.

[jbw9964]

@christophstrobl
Can you leave the comment if there's any progress on it?
I'm just curious about it.