title: Getting error in entityManagerFactory while overriding configuration properties in custom jar file from implementation class
body: <p>I have developed a app in java to perform the basic crud operations and packed it as a jar file using spring and hibernate. Then i included this jar file into another project and tried to implement the crud operations. But i am facing the following errors since i used session factory in both jar file and implementation project. </p>
  
  <p>Errors : "Error creating bean with name 'entityManagerFactory'" and "Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set".</p>
  
  <pre><code>2016-04-27 13:38:53.420  INFO 5348 --- [           main] org.hibernate.Version                    : HHH000412: Hibernate Core {4.3.11.Final}
  2016-04-27 13:38:53.423  INFO 5348 --- [           main] org.hibernate.cfg.Environment            : HHH000206: hibernate.properties not found
  2016-04-27 13:38:53.426  INFO 5348 --- [           main] org.hibernate.cfg.Environment            : HHH000021: Bytecode provider name : javassist
  2016-04-27 13:38:54.346  INFO 5348 --- [           main] o.hibernate.annotations.common.Version   : HCANN000001: Hibernate Commons Annotations {4.0.5.Final}
  2016-04-27 13:38:54.811  WARN 5348 --- [           main] o.h.e.jdbc.internal.JdbcServicesImpl     : HHH000342: Could not obtain connection to query metadata : Unknown database 'employee'
  2016-04-27 13:38:54.866  WARN 5348 --- [           main] s.c.a.AnnotationConfigApplicationContext : Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
  2016-04-27 13:38:55.170 ERROR 5348 --- [           main] o.s.boot.SpringApplication               : Application startup failed
  
  org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.test.SpringApplicationContextLoader.loadContext(SpringApplicationContextLoader.java:98) [spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:228) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:230) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:249) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:283) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:173) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:128) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:203) [surefire-booter-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:155) [surefire-booter-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103) [surefire-booter-2.18.1.jar:2.18.1]
  Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
      at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:104) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:71) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:205) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:319) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      ... 41 common frames omitted
  
  2016-04-27 13:38:55.251  INFO 5348 --- [           main] .b.l.ClasspathLoggingApplicationListener : Application failed to start with classpath: [file:/D:/Spring-Tool-Suite/apijavatest/target/surefire/surefirebooter477966727946882911.jar]
  2016-04-27 13:38:55.251 ERROR 5348 --- [           main] o.s.test.context.TestContextManager      : Caught exception while allowing TestExecutionListener [org.springframework.test.context.support.DependencyInjectionTestExecutionListener@19651f3] to prepare test instance [com.obs.ObsApplicationTests@c8afef]
  
  java.lang.IllegalStateException: Failed to load ApplicationContext
      at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:228) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:230) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:289) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:291) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:249) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:89) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) [junit-4.12.jar:4.12]
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363) [junit-4.12.jar:4.12]
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:193) [spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.apache.maven.surefire.junit4.JUnit4Provider.execute(JUnit4Provider.java:283) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.executeWithRerun(JUnit4Provider.java:173) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.executeTestSet(JUnit4Provider.java:153) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.junit4.JUnit4Provider.invoke(JUnit4Provider.java:128) [surefire-junit4-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.invokeProviderInSameClassLoader(ForkedBooter.java:203) [surefire-booter-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.runSuitesInProcess(ForkedBooter.java:155) [surefire-booter-2.18.1.jar:2.18.1]
      at org.apache.maven.surefire.booter.ForkedBooter.main(ForkedBooter.java:103) [surefire-booter-2.18.1.jar:2.18.1]
  Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'entityManagerFactory' defined in class path resource [org/springframework/boot/autoconfigure/orm/jpa/HibernateJpaAutoConfiguration.class]: Invocation of init method failed; nested exception is org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1578) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:545) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:482) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:306) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:230) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:302) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:197) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1054) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:829) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:538) ~[spring-context-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:766) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.SpringApplication.createAndRefreshContext(SpringApplication.java:361) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.SpringApplication.run(SpringApplication.java:307) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.boot.test.SpringApplicationContextLoader.loadContext(SpringApplicationContextLoader.java:98) ~[spring-boot-1.3.3.RELEASE.jar:1.3.3.RELEASE]
      at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116) ~[spring-test-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      ... 26 common frames omitted
  Caused by: org.hibernate.HibernateException: Access to DialectResolutionInfo cannot be null when 'hibernate.dialect' not set
      at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.determineDialect(DialectFactoryImpl.java:104) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.engine.jdbc.dialect.internal.DialectFactoryImpl.buildDialect(DialectFactoryImpl.java:71) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.engine.jdbc.internal.JdbcServicesImpl.configure(JdbcServicesImpl.java:205) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.boot.registry.internal.StandardServiceRegistryImpl.configureService(StandardServiceRegistryImpl.java:111) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.service.internal.AbstractServiceRegistryImpl.initializeService(AbstractServiceRegistryImpl.java:234) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.service.internal.AbstractServiceRegistryImpl.getService(AbstractServiceRegistryImpl.java:206) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.cfg.Configuration.buildTypeRegistrations(Configuration.java:1887) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1845) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:857) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl$4.perform(EntityManagerFactoryBuilderImpl.java:850) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.boot.registry.classloading.internal.ClassLoaderServiceImpl.withTccl(ClassLoaderServiceImpl.java:425) ~[hibernate-core-4.3.11.Final.jar:4.3.11.Final]
      at org.hibernate.jpa.boot.internal.EntityManagerFactoryBuilderImpl.build(EntityManagerFactoryBuilderImpl.java:849) ~[hibernate-entitymanager-4.3.11.Final.jar:4.3.11.Final]
      at org.springframework.orm.jpa.vendor.SpringHibernateJpaPersistenceProvider.createContainerEntityManagerFactory(SpringHibernateJpaPersistenceProvider.java:60) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean.createNativeEntityManagerFactory(LocalContainerEntityManagerFactoryBean.java:343) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.afterPropertiesSet(AbstractEntityManagerFactoryBean.java:319) ~[spring-orm-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1637) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574) ~[spring-beans-4.2.5.RELEASE.jar:4.2.5.RELEASE]
      ... 41 common frames omitted
  </code></pre>
  
  <p>In the jar file, i am having the class as,</p>
  
  <p>DatabaseConfig.java</p>
  
  <pre><code>package obs.config;
  
  import java.util.Properties;
  
  import javax.sql.DataSource;
  
  import org.springframework.beans.factory.annotation.Value;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.jdbc.datasource.DriverManagerDataSource;
  import org.springframework.orm.hibernate4.HibernateTransactionManager;
  import org.springframework.orm.hibernate4.LocalSessionFactoryBean;
  
  @Configuration
  public class DatabaseConfig {
  
      @Value("${spring.datasource.driver-class-name}")
      private String DB_DRIVER;
  
      @Value("${spring.datasource.username}")
      private String DB_USERNAME;
  
      @Value("${spring.datasource.password}")
      private String DB_PASSWORD;
  
      @Value("${spring.datasource.url}")
      private String DB_URL;
  
      @Value("${spring.jooq.sql-dialect}")
      private String HIBERNATE_DIALECT;
  
      @Value("${spring.jpa.show-sql}")
      private String HIBERNATE_SHOW_SQL;
  
      @Value("${spring.jpa.hibernate.ddl-auto}")
      private String HIBERNATE_HBM2DDL_AUTO;
  
      @Value("${spring.main.sources}")
      private String ENTITYMANAGER_PACKAGES_TO_SCAN;
  
      @Bean
      public DataSource datasource(){
          DriverManagerDataSource datasource=null;
          try{
              datasource=new DriverManagerDataSource();
              datasource.setDriverClassName(DB_DRIVER);
              datasource.setUsername(DB_USERNAME);
              datasource.setPassword(DB_PASSWORD);
              datasource.setUrl(DB_URL);
          } catch (Exception e) {
              e.getMessage();
          }
          return datasource;      
      }
  
      @Bean
      public LocalSessionFactoryBean sessionFactory(){
          LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
          sessionFactory.setDataSource(datasource());
          sessionFactory.setPackagesToScan(ENTITYMANAGER_PACKAGES_TO_SCAN);
          Properties props=new Properties();
          props.put("hibernate.dialect",HIBERNATE_DIALECT);
          props.put("hibernate.show_sql",HIBERNATE_SHOW_SQL);
          props.put("hibernate.hbm2ddl.auto",HIBERNATE_HBM2DDL_AUTO);
          sessionFactory.setHibernateProperties(props);
          return sessionFactory;      
      }
  
      @Bean
      public HibernateTransactionManager transaction(){
          HibernateTransactionManager transaction=new HibernateTransactionManager();
          transaction.setSessionFactory(sessionFactory().getObject());
          return transaction;
      }   
  }
  </code></pre>
  
  <p>MainService.java</p>
  
  <pre><code>package obs.service;
  
  import java.util.List;
  
  import obs.dao.IMainDAO;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  @Service
  public class MainService&lt;T&gt; implements IMainService&lt;T&gt;{
  
      @Autowired
      public IMainDAO&lt;T&gt; userDao;
  
      @Override
      public long save(T entity) {
          return userDao.save(entity);
      }
  
      @Override
      public void update(T entity) {
          userDao.update(entity);     
      }
  
      @Override
      public T findOne(long id) {
          return (T) userDao.findOne(id);
      }
  
      @Override
      public List&lt;T&gt; findAll() {
          return userDao.findAll();
      }
  
      @Override
      public void delete(T id) {
          userDao.delete(id); 
      }
  }
  </code></pre>
  
  <p>and in my implementation class,</p>
  
  <p>EmployeeController.java</p>
  
  <pre><code>package api.controller;
  
  import obs.service.MainService;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Controller;
  import org.springframework.web.bind.annotation.RequestMapping;
  import org.springframework.web.bind.annotation.RequestMethod;
  import org.springframework.web.bind.annotation.ResponseBody;
  
  import api.model.Employee;
  import api.service.IEmployeeService;
  
  @Controller
  public class EmployeeController extends MainService&lt;Employee&gt;{  
  
      @Autowired
      private IEmployeeService empService;
  
      @RequestMapping(value="/insert",method=RequestMethod.POST,produces="application/json")
      public @ResponseBody Employee save(String name,String email,String password){
          Employee emp=null;
          try{
              emp=new Employee();
              emp.setName(name);
              emp.setEmail(email);
              emp.setPassword(password);  
              this.save(emp);
          }catch(Exception e){
              e.printStackTrace();
          }       
          return emp;
      }
  
      @RequestMapping(value="/find",method=RequestMethod.GET,produces="application/json")
      public @ResponseBody Employee find(String id){      
          Employee emp=null;
          try{
              emp=empService.findOne(Long.parseLong(id));
          }catch(Exception e){
              e.printStackTrace();
          }
          return emp;     
      }
  }
  </code></pre>
  
  <p>EmployeeService.java</p>
  
  <pre><code>package api.service;
  
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  import api.dao.IEmployeeDAO;
  import api.model.Employee;
  
  @Service("IEmployeeService")
  public class EmployeeService implements IEmployeeService{
  
      @Autowired
      public IEmployeeDAO userDao;
  
      @Override
      public Employee findOne(long id) {
          return userDao.findOne(id);
      }
  }
  </code></pre>
  
  <p>As per my understanding, since i am having session factory in both jar file and implementation class, i am facing this issue. But i can't create jar file without the session factory. </p>
  
  <p>Please suggest me how to handle this scenario.</p>