title: org.hibernate.PersistentObjectException: detached entity passed to persist with H2 in memory database
body: <p>i am using H2 in memory database for testing and my configuration is as follows:</p>
  
  <p><strong>1- SpringTestingConfig:</strong></p>
  
  <pre><code>@Configuration
  @ComponentScan(basePackages = "com.myapp.data", excludeFilters = { @Filter(Configuration.class) })
  @PropertySource("classpath:/test.properties")
  @Profile("test")
  public class SpringTestingConfig {
     @Bean
     public DataSource dataSource() {
        DriverManagerDataSource dataSource = new DriverManagerDataSource();
        dataSource.setDriverClassName("org.h2.Driver");
        dataSource.setUrl("jdbc:h2:mem:test;MODE=Mysql;DB_CLOSE_DELAY=-1;DB_CLOSE_ON_EXIT=FALSE;INIT=CREATE SCHEMA IF NOT EXISTS MYAPP");
        dataSource.setUsername("sa");
        dataSource.setPassword("");
        return dataSource;
     }
  }
  </code></pre>
  
  <p><strong>2- MyTestClass:</strong></p>
  
  <pre><code>@RunWith(SpringJUnit4ClassRunner.class)
  @TestExecutionListeners({ WebContextTestExecutionListener.class,
          DependencyInjectionTestExecutionListener.class,
          DirtiesContextTestExecutionListener.class,
          TransactionalTestExecutionListener.class })
  @ActiveProfiles("test")
  @DirtiesContext
  @ContextConfiguration(loader = AnnotationConfigContextLoader.class, classes = {
          SpringConfig.class, SpringTestingConfig.class,
          SpringLocalContainerJPAConfig.class, CustomConfiguration.class })
  @PrepareForTest({ FacesContext.class })
  @PowerMockIgnore({ "javax.management.*", "javax.xml.parsers.*",
      "com.sun.org.apache.xerces.internal.jaxp.*", "ch.qos.logback.*",
      "org.slf4j.*" })
  public class MyTestClass{
  
     private Company company;
     private User user;
  
  
     @Test
      public void signup(){
  
         User user = new User();
      Company company = new Company();
      company.setName("Test");
      company = usService.saveCompany(company);
      user.setFirstName("Test");
      user.setLastName("User");
      user.setEmail("test@test.com");
      user.setPassword("verySecret");
      user.setCompany(company);
      user = usService.saveUser(user); // gives exception
  
     }
  
  } 
  </code></pre>
  
  <p><strong>3- Save methods:</strong></p>
  
  <pre><code>@Transactional(propagation = Propagation.REQUIRED)
      public User saveUser(User user) {
          return userRepository.saveAndFlush(user); //JpaRepository
      }
  
  @Transactional(propagation = Propagation.REQUIRED)
      public Company saveCompany(Company company) {
          return companyRepository.saveAndFlush(company); //JpaRepository
      }
  </code></pre>
  
  <p><strong>4- JPA Config</strong></p>
  
  <pre><code>@Configuration
  @EnableSpringConfigured
  public class SpringJNDIJPAConfig {
  protected static final Logger logger = LoggerFactory.getLogger(SpringConfig.class);
  protected static final String HIBERNATE_TRANSACTION_JTA_PLATFORM = "hibernate.transaction.jta.platform";
  
  @Value("${hibernate.naming_strategy:org.hibernate.cfg.DefaultNamingStrategy}")
  private String namingStrategy;
  
  @Value("${hibernate.packages_to_scan:com.myapp.data.domain}")
  private String packagesToScan;
  
  @Value("${spring_config.project_name}")
  private String projectName;
  
  @Value("${hibernate.show_sql:false}")
  private String showSql;
  
  @Value("${hibernate.hbm2ddl.auto:update}")
  private String hbm2ddlAuto;
  
  @Value("${hibernate.format_sql:false}")
  private String formatSql;
  
  @Value("${hibernate.dialect:org.hibernate.dialect.MySQL5InnoDBDialect}")
  private String hibernateDialect;
  
  @Value("${hibernate.connection.useUnicode:true}")
  private String useUnicode;
  
  @Value("${hibernate.connection.characterEncoding:UTF-8}")
  private String characterEncoding;
  
  @Value("${hibernate.charSet:UTF-8}")
  private String charSet;
  
  @Value("${hibernate.default_schema}")
  private String defaultSchema;
  
  @Value("${hibernate.use_default_schema:true}")
  private boolean useDefaultSchema;
  
  @Value("${hibernate.use_sql_comments:true}")
  private String useSqlComments;
  
  @Autowired
  private ApplicationContext applicationContext;
  
  @Autowired
  private DataSource dataSource;
  
  @Bean
  public HibernateExceptionTranslator hibernateExceptionTranslator() {
    return new HibernateExceptionTranslator();
  }
  
  @Bean
  protected EntityManagerFactory entityManagerFactory() {
    LocalContainerEntityManagerFactoryBean bean = new LocalContainerEntityManagerFactoryBean();
  
    JtaPersistenceUnitManager puManager = new JtaPersistenceUnitManager();
    Map&lt;String, DataSource&gt; dataSources = new HashMap&lt;String, DataSource&gt;();
    dataSources.put("dataSource", dataSource);
    puManager.setDataSourceLookup(new MapDataSourceLookup(dataSources));
    puManager.setDefaultDataSource(dataSource);
    puManager.setPackagesToScan(packagesToScan());
    bean.setPersistenceUnitManager(puManager);
  
    bean.setPersistenceProviderClass(HibernatePersistence.class);
    bean.setJpaVendorAdapter(new HibernateJpaVendorAdapter());
  
    Properties jpaProperties = getHibernateProperties();
    jpaProperties.put(HIBERNATE_TRANSACTION_JTA_PLATFORM, SpringJtaPlatform.class.getName().toString());
    bean.setJpaProperties(jpaProperties);
  
    puManager.afterPropertiesSet();
    bean.afterPropertiesSet();
    return bean.getObject();
  }
  
  protected String getDefaultSchema() {
    String ds = ConfigurationUtil.config().getString("db.schema.name");
    if (ds != null) defaultSchema = ds;
    return defaultSchema;
  }
  
  protected String getUseUnicode() {
        return useUnicode;
  }
  
  protected String getCharacterEncoding() {
        return characterEncoding;
  }
  
  protected String getCharSet() {
        return charSet;
  }
  
  protected String getFormatSql() {
    return formatSql;
  }
  
  protected String getHbm2ddlAuto() {
    return hbm2ddlAuto;
  }
  
  protected String getHibernateDialect() {
    return hibernateDialect;
  }
  
  protected Properties getHibernateProperties() {
    Properties properties = new Properties();
    properties.put("hibernate.dialect", getHibernateDialect());
    properties.put("hibernate.hbm2ddl.auto", getHbm2ddlAuto());
    properties.put("hibernate.show_sql", getShowSql());
    properties.put("hibernate.use_sql_comments", getUseSqlComments());
    properties.put("hibernate.format_sql", getFormatSql());
    if(useDefaultSchema) {
       properties.put("hibernate.default_schema", getDefaultSchema());
    }
    //properties.put("hibernate.ejb.naming_strategy", namingStrategy);
    properties.put("hibernate.hbm2ddl.import_files", "/import.sql");
    //properties.put("hibernate.connection.characterEncoding", getCharacterEncoding());
    //properties.put("hibernate.connection.charSet", getCharSet());
    //properties.put("hibernate.connection.useUnicode", getUseUnicode());
    if(logger.isInfoEnabled()) {
       logger.info(MessageFormat.format("SET HIBERNATE PROPERTIES: {0}", properties.toString()));
    }
    return properties;
  }
  
  protected String getProjectName() {
    return projectName;
  }
  
  protected String getShowSql() {
    return showSql;
  }
  
  protected String getUseSqlComments() {
    return useSqlComments;
  }
  
  protected String packagesToScan() {
        return packagesToScan;
     }
  
  @Bean
  protected JtaTransactionManager transactionManager() {
    SpringBeanFactory.setApplicationContext(applicationContext);
    JtaTransactionManager manager = new JtaTransactionManager();
    manager.setTransactionManagerName("java:jboss/TransactionManager");
    manager.setUserTransactionName("java:jboss/UserTransaction");
    manager.afterPropertiesSet();
    return manager;
  }
  
  }
  </code></pre>
  
  <p><strong>5- User Entity:</strong></p>
  
  <pre><code>@Entity
  @Table(name = "User", uniqueConstraints = { @UniqueConstraint(columnNames = {
          "CompanyGID", "MPath" }) })
  public class User extends PersistableEntity implements UserDetails {
      /**
       * 
       */
      private static final long serialVersionUID = -6520416613985790209L;
  
      @ManyToOne(fetch = FetchType.EAGER, cascade = CascadeType.ALL)
      @JoinColumn(name = "CompanyGID")
      private Company company;
  </code></pre>
  
  <p><strong>ISSUE:</strong> the code in test method works very fine when running the application (local database) on Jboss and invoking the code from backing bean method, but when running it from test (in memory database) it saves company and when trying to save user it gives the exception:</p>
  
  <pre><code>    org.springframework.dao.InvalidDataAccessApiUsageException: detached entity passed to persist: com.myapp.data.domain.Company; nested exception is org.hibernate.PersistentObjectException: detached entity passed to persist: com.myapp.data.domain.Company
      at org.springframework.orm.hibernate3.SessionFactoryUtils.convertHibernateAccessException(SessionFactoryUtils.java:668)
      at org.springframework.orm.jpa.vendor.HibernateJpaDialect.translateExceptionIfPossible(HibernateJpaDialect.java:106)
      at org.springframework.orm.jpa.AbstractEntityManagerFactoryBean.translateExceptionIfPossible(AbstractEntityManagerFactoryBean.java:403)
      at org.springframework.dao.support.ChainedPersistenceExceptionTranslator.translateExceptionIfPossible(ChainedPersistenceExceptionTranslator.java:58)
      at org.springframework.dao.support.DataAccessUtils.translateIfNecessary(DataAccessUtils.java:213)
      at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:163)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.data.jpa.repository.support.LockModeRepositoryPostProcessor$LockModePopulatingMethodIntercceptor.invoke(LockModeRepositoryPostProcessor.java:92)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.aop.interceptor.ExposeInvocationInterceptor.invoke(ExposeInvocationInterceptor.java:91)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
      at com.myapp.service.UserService.saveUser_aroundBody6(UserService.java:98)
      at com.myapp.service.UserService$AjcClosure7.run(UserService.java:1)
      at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$around$org_springframework_transaction_aspectj_AbstractTransactionAspect$1$2a73e96cproceed(AbstractTransactionAspect.aj:59)
      at org.springframework.transaction.aspectj.AbstractTransactionAspect$AbstractTransactionAspect$1.proceedWithInvocation(AbstractTransactionAspect.aj:65)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
      at org.springframework.transaction.aspectj.AbstractTransactionAspect.ajc$around$org_springframework_transaction_aspectj_AbstractTransactionAspect$1$2a73e96c(AbstractTransactionAspect.aj:63)
      at com.myapp.service.UserService.saveUser(UserService.java:93)
      at com.myapp.service.UserService$$FastClassByCGLIB$$697e2a1b.invoke(&lt;generated&gt;)
      at org.springframework.cglib.proxy.MethodProxy.invoke(MethodProxy.java:204)
      at org.springframework.aop.framework.CglibAopProxy$CglibMethodInvocation.invokeJoinpoint(CglibAopProxy.java:698)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
      at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.aop.framework.CglibAopProxy$DynamicAdvisedInterceptor.intercept(CglibAopProxy.java:631)
      at com.myapp.service.UserService$$EnhancerByCGLIB$$abc2864a.saveUser(&lt;generated&gt;)
      at test.myapp.web.controllers.SignUpBeanTest.testSignUp(SignUpBeanTest.java:126)
      at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:74)
      at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:83)
      at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:72)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:88)
      at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
      at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:71)
      at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  Caused by: org.hibernate.PersistentObjectException: detached entity passed to persist: com.myapp.data.domain.Company
      at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:141)
      at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:842)
      at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:835)
      at org.hibernate.ejb.engine.spi.EJB3CascadingAction$1.cascade(EJB3CascadingAction.java:53)
      at org.hibernate.engine.internal.Cascade.cascadeToOne(Cascade.java:387)
      at org.hibernate.engine.internal.Cascade.cascadeAssociation(Cascade.java:330)
      at org.hibernate.engine.internal.Cascade.cascadeProperty(Cascade.java:208)
      at org.hibernate.engine.internal.Cascade.cascade(Cascade.java:165)
      at org.hibernate.event.internal.AbstractSaveEventListener.cascadeBeforeSave(AbstractSaveEventListener.java:424)
      at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:263)
      at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:192)
      at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:135)
      at org.hibernate.ejb.event.EJB3PersistEventListener.saveWithGeneratedId(EJB3PersistEventListener.java:78)
      at org.hibernate.event.internal.DefaultPersistEventListener.entityIsTransient(DefaultPersistEventListener.java:208)
      at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:151)
      at org.hibernate.event.internal.DefaultPersistEventListener.onPersist(DefaultPersistEventListener.java:78)
      at org.hibernate.internal.SessionImpl.firePersist(SessionImpl.java:852)
      at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:826)
      at org.hibernate.internal.SessionImpl.persist(SessionImpl.java:830)
      at org.hibernate.ejb.AbstractEntityManagerImpl.persist(AbstractEntityManagerImpl.java:875)
      at org.springframework.orm.jpa.SharedEntityManagerCreator$SharedEntityManagerInvocationHandler.invoke(SharedEntityManagerCreator.java:241)
      at org.springframework.data.jpa.repository.support.SimpleJpaRepository.save(SimpleJpaRepository.java:354)
      at org.springframework.data.jpa.repository.support.SimpleJpaRepository.saveAndFlush(SimpleJpaRepository.java:368)
      at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.executeMethodOn(RepositoryFactorySupport.java:333)
      at org.springframework.data.repository.core.support.RepositoryFactorySupport$QueryExecutorMethodInterceptor.invoke(RepositoryFactorySupport.java:318)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.transaction.interceptor.TransactionInterceptor$1.proceedWithInvocation(TransactionInterceptor.java:96)
      at org.springframework.transaction.interceptor.TransactionAspectSupport.invokeWithinTransaction(TransactionAspectSupport.java:260)
      at org.springframework.transaction.interceptor.TransactionInterceptor.invoke(TransactionInterceptor.java:94)
      at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
      at org.springframework.dao.support.PersistenceExceptionTranslationInterceptor.invoke(PersistenceExceptionTranslationInterceptor.java:155)
      ... 38 more
  </code></pre>