Error creating entityManagerFactory due to error tying to scan <jar-file>

Question

I am following http://spring.io/guides/tutorials/data/3 ; I am not sure what I did wrong, but I keep on getting exceptions that I don't understand. I tried searching for questions with the same exceptions to no avail.

Stack trace: http://pastebin.com/WYPqS6da

PersistenceConfig.java

@Configuration
@EnableJpaRepositories
@EnableTransactionManagement
public class PersistenceConfig {

    @Bean
    public DataSource dataSource() throws SQLException {
        EmbeddedDatabaseBuilder builder = new EmbeddedDatabaseBuilder();
        return builder.setType(EmbeddedDatabaseType.HSQL).build();
    }

    @Bean
    public EntityManagerFactory entityManagerFactory() throws SQLException {
        HibernateJpaVendorAdapter vendorAdapter = new HibernateJpaVendorAdapter();
        vendorAdapter.setDatabase(Database.HSQL);
        vendorAdapter.setGenerateDdl(true);

        LocalContainerEntityManagerFactoryBean factory = new LocalContainerEntityManagerFactoryBean();
        factory.setJpaVendorAdapter(vendorAdapter);
        factory.setPackagesToScan("com.scrumster.persistence.domain");
        factory.setDataSource(dataSource());
        factory.afterPropertiesSet();

        return factory.getObject();
    }

    @Bean
    public EntityManager entityManager(EntityManagerFactory entityManagerFactory) {
        return entityManagerFactory.createEntityManager();
    }

    @Bean
    public PlatformTransactionManager transactionManager() throws SQLException {
        JpaTransactionManager txManager = new JpaTransactionManager();
        txManager.setEntityManagerFactory(entityManagerFactory());
        return txManager;
    }

    @Bean
    public HibernateExceptionTranslator hibernateExceptionTranslator() {
        return new HibernateExceptionTranslator();
    }
}

build.gradle:

apply plugin: 'war'
apply plugin: 'tomcat'
apply plugin: 'java'
apply plugin: 'propdeps'
apply plugin: 'propdeps-maven'
apply plugin: 'propdeps-idea'
apply plugin: 'propdeps-eclipse'
apply plugin: 'eclipse'
apply plugin: 'idea'

buildscript {
  repositories {
    mavenCentral()
    maven {
      url "http://download.java.net/maven/2"
    }
    maven { url 'http://repo.spring.io/plugins-release' }
  }

  dependencies {
    classpath 'org.gradle.api.plugins:gradle-tomcat-plugin:0.9.8'
    classpath 'org.springframework.build.gradle:propdeps-plugin:0.0.1'
  }
}

repositories {
  mavenCentral()
  maven { url 'http://repo.spring.io/milestone/'}
}

dependencies {
    def tomcatVersion = '7.0.42'
    tomcat "org.apache.tomcat.embed:tomcat-embed-core:${tomcatVersion}",
            "org.apache.tomcat.embed:tomcat-embed-logging-juli:${tomcatVersion}"
    tomcat("org.apache.tomcat.embed:tomcat-embed-jasper:${tomcatVersion}") {
      exclude group: 'org.eclipse.jdt.core.compiler', module: 'ecj'
    }

    compile 'org.springframework:spring-webmvc:4.0.5.RELEASE'
    compile 'org.springframework.data:spring-data-jpa:1.3.4.RELEASE'
    compile 'org.hibernate.javax.persistence:hibernate-jpa-2.0-api:1.0.1.Final'
    compile 'org.hibernate:hibernate-entitymanager:4.0.1.Final'
    compile 'org.springframework.hateoas:spring-hateoas:0.7.0.RELEASE'
    compile 'com.jayway.jsonpath:json-path:0.8.1'

    compile 'org.springframework.security:spring-security-web:3.2.0.M2'
    compile 'org.springframework.security:spring-security-core:3.2.0.M2'
    compile 'org.springframework.security:spring-security-config:3.2.0.M2'

    compile 'org.slf4j:slf4j-api:1.7.5'
    runtime 'org.hsqldb:hsqldb:2.3.2'
    runtime 'org.slf4j:slf4j-jdk14:1.7.5'
    runtime 'com.fasterxml.jackson.core:jackson-databind:2.3.3'
    runtime 'javax.xml.bind:jaxb-api:2.2.9'

    provided 'javax.servlet:javax.servlet-api:3.0.1'

    testCompile 'com.jayway.jsonpath:json-path-assert:0.8.1'
    testCompile 'org.springframework:spring-test:4.0.5.RELEASE'
    testCompile 'junit:junit:4.11'
    testCompile "org.mockito:mockito-core:1.9.5"

}

task wrapper(type: Wrapper) {
    gradleVersion = '1.12'
}

tomcatRunWar.contextPath = ''

Stacktrace:

Caused by: java.lang.RuntimeException: Error while reading file:/E:/Files/Source/Workspace-Eclipse2/scrumster/bin/
        at org.hibernate.ejb.packaging.NativeScanner.getFilesInJar(NativeScanner.java:193)
        at org.hibernate.ejb.Ejb3Configuration.addScannedEntries(Ejb3Configuration.java:503)
        at org.hibernate.ejb.Ejb3Configuration.scanForClasses(Ejb3Configuration.java:851)
        ... 58 more
Caused by: java.io.IOException: invalid constant type: 18
        at javassist.bytecode.ConstPool.readOne(ConstPool.java:1113)
        at javassist.bytecode.ConstPool.read(ConstPool.java:1056)
        at javassist.bytecode.ConstPool.<init>(ConstPool.java:150)
        at javassist.bytecode.ClassFile.read(ClassFile.java:765)
        at javassist.bytecode.ClassFile.<init>(ClassFile.java:109)

I hope someone could point me to the right source, or help me in this predicament.

Answer 1

The error:

invalid constant type: 18

Indicates that you have built the Jars with Java 8, but are attempting to run the application in a lower version.

From what I have seen elsewhere, you probably need to switch to a newer version of javassist (which is raising the error), as the version you are using is not compatible with Java 8.

Answer 2

I had the same problem while migrating one of my projects to Java 8. Fixed it by updating the hibernate-entitymanager artifact version from 4.2.0.Final to 4.3.8.Final.

Answer 3

If you use 3.6.10-Final you need exclude javassist (without org. prefix)

    <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-entitymanager</artifactId>
            <version>3.6.10.Final</version>
            <scope>compile</scope>
            <exclusions>
                <exclusion>
                    <artifactId>javassist</artifactId>
                    <groupId>javassist</groupId>
                </exclusion>
            </exclusions>
        </dependency>
       <!-- javassist with fixed https://issues.jboss.org/browse/JASSIST-174 -->
       <dependency>
            <groupId>org.javassist</groupId>
            <artifactId>javassist</artifactId>
            <version>3.18.2-GA</version>
        </dependency>