have to use EclipseLink as JPA implementation for my Spring Batch Job because Hibernate lacks an important feature that I need.
Unfortunately, after exchanging Hibernate with EclipseLink, i get the following error when starting my batch jar:
$ java -jar my-batch.jar
Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2021-09-17 15:52:38.387 ERROR 15708 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
The bean 'transactionManager', defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class], could not be registered. A bean with that name has already been defined in class path resource [path/to/my/EclipseLinkJpaConfiguration.class] and overriding is disabled.
Action:
Consider renaming one of the beans or enabling overriding by setting spring.main.allow-bean-definition-overriding=true
In my current pom.xml u can see my dependencies and how i exchanged Hibernate with EclipseLink:
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>2.3.12.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
<version>2.3.12.RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
</exclusion>
<exclusion>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.batch</groupId>
<artifactId>spring-batch-core</artifactId>
<version>4.2.7.RELEASE>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>org.eclipse.persistence.jpa</artifactId>
<version>2.7.5</version>
</dependency>
</dependencies>
In addition to this I added EclipseLinkJpaConfiguration which is required in order to use EclipseLink in Spring:
@Configuration
public class EclipseLinkJpaConfiguration extends JpaBaseConfiguration {
protected EclipseLinkJpaConfiguration(DataSource dataSource,
JpaProperties properties,
ObjectProvider<JtaTransactionManager> jtaTransactionManager) {
super(dataSource, properties, jtaTransactionManager);
}
@Override
protected AbstractJpaVendorAdapter createJpaVendorAdapter() {
return new EclipseLinkJpaVendorAdapter();
}
@Override
protected Map<String, Object> getVendorProperties() {
Map<String, Object> map = new HashMap<>();
map.put(PersistenceUnitProperties.WEAVING, "false");
map.put(PersistenceUnitProperties.LOGGING_LEVEL, SessionLog.FINER_LABEL);
return map;
}
}
I have no idea whats causing this.
Adding spring.main.allow-bean-definition-overriding=true is obviously a temporary solution but i would like to fix this.
I'd appreciate any help! Thanks in advance
