Spring Boot + Tomcat + EclipseLink causes: Cannot apply class transformer without LoadTimeWeaver specified - spring

Question

I'm currently struggleing around with a Spring-Boot application that should use EclipseLink as JPa implementation and that app should run within a Tomcat 8 container. Unfortunatelly I'm not able to get it to work.
As far as I read I need to add the spring-instruments.jar as java command line argument (javaagent), but I read somewhere that tomcat 8 is not requiring that because it automatically decides which load time weaver it uses. Does anyone have an idea what's going wrong here?
Basically I get the following exception when I try to run the application:
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [javax.persistence.EntityManagerFactory]: Factory method 'entityManagerFactory' threw exception; nested exception is java.lang.IllegalStateException: Cannot apply class transformer without LoadTimeWeaver specified
at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:189)
at org.springframework.beans.factory.support.ConstructorResolver.instantiateUsingFactoryMethod(ConstructorResolver.java:588)
... 95 more
Caused by: java.lang.IllegalStateException: Cannot apply class transformer without LoadTimeWeaver specified
at org.springframework.orm.jpa.persistenceunit.SpringPersistenceUnitInfo.addTransformer(SpringPersistenceUnitInfo.java:80)
at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactoryImpl(PersistenceProvider.java:373)
at org.eclipse.persistence.jpa.PersistenceProvider.createContainerEntityManagerFactory(PersistenceProvider.java:313)
at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343)
at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:319)
at foo.AppConfiguration.entityManagerFactory(AppConfiguration.java:57)
at foo.AppConfiguration$$EnhancerBySpringCGLIB$$a92e9feb.CGLIB$entityManagerFactory$1(<generated>)
at foo.AppConfiguration$$EnhancerBySpringCGLIB$$a92e9feb$$FastClassBySpringCGLIB$$e4dbaad1.invoke(<generated>)
at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
at foo.AppConfiguration$$EnhancerBySpringCGLIB$$a92e9feb.entityManagerFactory(<generated>)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
My pom.xml looks like:
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.ss.stock</groupId>
<artifactId>SimpleTest</artifactId>
<version>1.0-SNAPSHOT</version>
<packaging>war</packaging>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>1.8</maven.compiler.source>
<maven.compiler.target>1.8</maven.compiler.target>
</properties>
<build>
<plugins>
<plugin>
<groupId>org.apache.tomcat.maven</groupId>
<artifactId>tomcat7-maven-plugin</artifactId>
<version>2.2</version>
<configuration>
<url>http://raspberrypi:8080/manager/text</url>
<server>TomcatServer</server>
<path>/StockBatch</path>
</configuration>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>2.6</version>
<configuration>
<failOnMissingWebXml>false</failOnMissingWebXml>
</configuration>
</plugin>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>1.4.0.RELEASE</version>
</plugin>
</plugins>
</build>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-tomcat</artifactId>
<scope>provided</scope>
<version>1.4.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<version>1.4.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter</artifactId>
<version>1.4.0.RELEASE</version>
</dependency>
<dependency>
<groupId>org.eclipse.persistence</groupId>
<artifactId>eclipselink</artifactId>
<version>2.6.3</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-tx</artifactId>
<version>4.3.1.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.data</groupId>
<artifactId>spring-data-jpa</artifactId>
<version>1.10.2.RELEASE</version>
</dependency>
<dependency>
<groupId>postgresql</groupId>
<artifactId>postgresql</artifactId>
<version>9.1-901.jdbc4</version>
</dependency>
</dependencies>
</project>
And my Spring boot Configuration looks like:
#Configuration
#EnableJpaRepositories("foo")
#EnableTransactionManagement
#EnableLoadTimeWeaving
#EnableScheduling
public class AppConfiguration {
#Bean
public DataSource dataSource() {
DriverManagerDataSource dmds = new DriverManagerDataSource();
dmds.setUrl("jdbc:postgresql://raspberrypi:5432/stocks");
dmds.setUsername("abc");
dmds.setPassword("***");
dmds.setDriverClassName("org.postgresql.Driver");
return dmds;
}
#Bean
public EntityManagerFactory entityManagerFactory() {
EclipseLinkJpaVendorAdapter vendorAdapter = new EclipseLinkJpaVendorAdapter();
vendorAdapter.setGenerateDdl(true);
vendorAdapter.setShowSql(true);
LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
factory.setJpaVendorAdapter(vendorAdapter);
factory.setPackagesToScan("foo");
factory.setDataSource(dataSource());
factory.getJpaPropertyMap().put("eclipselink.jdbc.batch-writing", "JDBC");
factory.getJpaPropertyMap().put("eclipselink.jdbc.batch-writing.size", "500");
factory.getJpaPropertyMap().put("eclipselink.persistence-context.flush-mode", "commit");
factory.afterPropertiesSet();
return factory.getObject();
}
#Bean
public PlatformTransactionManager transactionManager() {
JpaTransactionManager txManager = new JpaTransactionManager();
txManager.setEntityManagerFactory(entityManagerFactory());
return txManager;
}
}