Hibernate EntityManager.merge（）不更新数据库 [英] Hibernate EntityManager.merge() does not update database

问题描述

我有一个使用Hibernate的Spring MVC webapp，我的问题是 em.merge 在调用后没有响应。

这是我的Controller

  @RequestMapping（value =/ updDep，method = RequestMethod.PUT） 
 @ResponseBody 
 public String updDeps（@RequestBody Department department）{
 departmentService.addDepartment（department）; 
 System.out.println（合并后;在控制器中）; 
返回成功; 
} 
  

以及带有addDepartment（）方法的Department Service类：

  @Repository 
 public class DepartmentServiceImpl implements DepartmentService {
 
 @PersistenceContext（unitName =MyPersistenceUnit）
私人EntityManager entityManager; 
 .... 
 // getter / setter entityManager .... 
 ... 
 @Override 
 @Transactional 
 public void addDepartment（Department部门）{
 System.out.println（department.getName（）+merge：+ department.getId（））; 
 getEntityManager（）。merge（department）; 
 getEntityManager（）。flush（）; 
 System.out.println（after）; 
 
 
 
 
 
 $ b因此我试着解释问题：
 <$ c $之后从我的控制器 updDeps（..）方法调用c> addDepartment（Department department）方法。 
我在服务器日志中看到这一点： 
 
 
  SECURITY23合并：3 
 Hibernate：
选择
 department0_.id作为
 department0_.name a 
 from 
部门部门
其中
 department0_.id =？ 
 Hibernate：
更新
部门
集合
名称=？ 
其中
 id =？ 
  
就是这样！为什么
 
  System.out.println（after）; 和 System.out.println（merge; in controller）; 不执行？在 em.merge 被调用后没有任何事情发生。
 
 
 
 MySQL表中的数据仍未更新。 
但如果我添加
 
 
  department.setId（null）; 
  
之前，像那样
  @Transactional 
 public void addDepartment（Department department）{
 department.setId（null）; 
 System.out.println（department.getName（）+merge：+ department.getId（））; 
 getEntityManager（）。merge（department）; 
 getEntityManager（）。flush（）; 
 System.out.println（after）; 
} 
  
所有的工作都是在db中创建新的实例，但我想更新当前。 
有什么问题？ 
 更新1  
项目结构：
  
 
 
 
  PERSISTENCE.XML  
 < persistence-unit name =MyPersistenceUnittransaction-type =RESOURCE_LOCAL> 
< provider> org.hibernate.ejb.HibernatePersistence< / provider> 
<属性> 
< property name =hibernate.connection.urlvalue =jdbc：mysql：// localhost：3306 / testbd/> 
< property name =hibernate.connection.driver_classvalue =com.mysql.jdbc.Driver/> 
< property name =hibernate.connection.usernamevalue =root/> 
< property name =hibernate.connection.passwordvalue =root/> 
<！ - < property name =hibernate.hbm2ddl.import_filesvalue =import.sql/>  - > 
< property name =hibernate.show_sqlvalue =true/> 
< property name =hibernate.format_sqlvalue =true/> 
< property name =hibernate.hbm2ddl.autovalue =update/> 
< property name =hibernate.dialectvalue =org.hibernate.dialect.MySQLDialect/> 
< / properties> 
< / persistence-unit> 
 
< /持久性> 
  
  SPRING CONFIG  
 < mvc：annotation-driven /> 
 
< context：annotation-config /> 
< context：component-scan base-package =epam.rest/> 
 
< bean class =org.springframework.web.servlet.view.InternalResourceViewResolver> 
< property name =prefix> 
< value> / WEB-INF / pages /< / value> 
< / property> 
< property name =suffix> 
<值> .jsp< /值> 
< / property> 
< / bean> 
 
< bean class =org.springframework.beans.factory.config.PropertyPlaceholderConfigurer> 
< property name =location> 
< value> classpath：jdbc.properties< / value> 
< / property> 
< / bean> 
 
< bean id =dataSourceclass =org.springframework.jdbc.datasource.DriverManagerDataSource> 
< property name =driverClassNamevalue =$ {jdbc.driverClassName}/> 
< property name =urlvalue =$ {jdbc.url}/> 
< property name =usernamevalue =$ {jdbc.username}/> 
< property name =passwordvalue =$ {jdbc.password}/> 
 
< / bean> 
 
< bean id =entityManagerFactoryclass =org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean> 
< property name =persistenceUnitNamevalue =MyPersistenceUnit/> 
< / bean> 
 
< bean id =transactionManagerclass =org.springframework.orm.jpa.JpaTransactionManager> 
< property name =dataSourceref =dataSource/> 
< property name =entityManagerFactoryref =entityManagerFactory/> 
< / bean> 
< tx：注解驱动的事务管理器=事务管理器proxy-target-class =true/> 
< / beans> 
  
 更新3  
添加我的LOG4J登录期.merge（）事务，我创建了ROLLBACK日志，但我不知道最新的问题是什么？： 
 
 
  08：54：28,291 DEBUG LogicalConnectionImpl：218  - 获得JDBC连接
 08：54：28,291 DEBUG JdbcTransaction：69  - 初始自动提交状态：true 
 08：54：28,292 DEBUG JdbcTransaction：71  - 禁用自动提交
 08:54： 28,301 TRACE IdentifierValue：139  -  ID unsaved-value：null 
 08：54：28,302 TRACE AbstractSaveEventListener：504  - 分离的实例：epam.rest.entity.Department 
 08：54：28,304 TRACE DefaultMergeEventListener：245 - 合并分离的实例
 08：54：28,310 TRACE DefaultLoadEventListener：240  - 加载实体：[epam.rest.entity.Department＃16] 
 08：54：28,311 TRACE DefaultLoadEventListener：403  - 试图解析： [epam.rest.entity.Department＃16] 
 08：54：28,311 TRACE DefaultLoadEventListener：427  - 对象在任何缓存中都未解析：[epam.rest.en tity.Department＃16] 
 08：54：28,312 TRACE AbstractEntityPersister：3923  - 获取实体：[epam.rest.entity.Department＃16] 
 08：54：28,312 DEBUG加载器：2109  - 加载实体：[epam.rest.entity.Department＃16] 
 08：54：28,312 DEBUG SQL：104  -  
选择
 department0_.id作为id1_0_0_，
 department0_.name作为name2_0_0_ 
 from 
 department department0_ 
 where 
 department0_.id =？ 
 08：54：28,314 TRACE JdbcCoordinatorImpl：319  - 注册语句[com.mysql.jdbc.JDBC4PreparedStatement@6c31a161：select department0_.id as id1_0_0_，department0_.name as department2_0_0_ from department department0_ where department0_.id = ** NOT SPECIFIED **] 
 08：54：28,314 TRACE JdbcCoordinatorImpl：329  - 注册最后一条查询语句[com.mysql.jdbc.JDBC4PreparedStatement@6c31a161：select department0_.id as id1_0_0_，department0_.name as department2_0_0_ from department department0_ where department0_ .id = ** NOT SPECIFIED **] 
 08：54：28,320 TRACE BasicBinder：84  - 绑定参数[1]为[BIGINT]  -  16 
 08：54：28,320 TRACE加载器：1909  - 绑定[2]参数总数
 08：54：28,321 TRACE JdbcCoordinatorImpl：374  - 注册结果集[com.mysql.jdbc.JDBC4ResultSet@4e1d82e2] 
 08：54：28,322 TRACE加载程序：937  - 处理结果集
 08：54：28,322 DEBUG加载程序：942  - 结果集行：0 
 08：54：28,323 DEBUG加载程序：1476  - 结果行：EntityKey [epam.rest.entity.Department＃16] 
 08：54：28,323 TRACE Loader：1652  - 从ResultSet初始化对象：[epam.rest.entity.Department＃16] 
 08：54：28,333 TRACE AbstractEntityPersister：2844  - 水化实体：[epam。 rest.entity.Department＃16] 
 08：54：28,334 TRACE BasicExtractor：74  - 找到[REWQQ]列[name2_0_0_] 
 08：54：28,337 TRACE Loader：962  - 完成处理结果集（ 1行）
 08：54：28,338 TRACE加载程序：1106  - 水合物总量：1 
 08：54：28,338 DEBUG TwoPhaseLoad：158  - 解析[epam.rest.entity.Department＃16] 
 08：54：28,343 DEBUG TwoPhaseLoad：277  - 完成实体化[epam.rest.entity.Department＃16] 
 08：54：28,344 TRACE JdbcCoordinatorImpl：358  - 释放语句[com.mysql.jdbc .JDBC4PreparedStatement @ 6c31a161：选择department0_.id作为id1_0_0_，department0_.name作为name2_0_0_来自department department0_，其中department0_.id = 16] 
 08：54：28,344 TRACE JdbcCoordinatorImpl：519  - 关闭结果集[com.mysql.jdbc .JDBC4ResultSet @ 4e1d82e2] 
 08:54： 28,345 TRACE JdbcCoordinatorImpl：476  - 关闭准备好的语句[com.mysql.jdbc.JDBC4PreparedStatement@6c31a161：select department0_.id as id1_0_0_，department0_.name as name2_0_0_ from department department0_ where department0_.id = 16] 
 08:54： 28,345 TRACE JdbcCoordinatorImpl：249  - 在语句执行处理后启动[ON_CLOSE] 
 08：54：28,345 TRACE StatefulPersistenceContext：1022  - 初始化非懒惰集合
 08：54：28,346 DEBUG加载器：2133  - 完成实体加载
 08：54：28,352 TRACE UnresolvedEntityInsertActions：121  - 没有实体插入操作具有不可空，暂时的实体依赖关系。 
 08：54：28,353 DEBUG AbstractTransactionImpl：173  - 提交
 08：54：28,353 TRACE SessionImpl：403  - 自动刷新会话
 08：54：28,353 TRACE AbstractFlushingEventListener：82  - 刷新会话
 08：54：28,355 DEBUG AbstractFlushingEventListener：144  - 处理刷新时间级联
 08：54：28,358 TRACE级联：151  - 处理级联ACTION_PERSIST_ON_FLUSH用于：epam.rest.entity.Department 
 08:54 ：28,359 TRACE级联：188  - 完成处理级联ACTION_PERSIST_ON_FLUSH用于：epam.rest.entity.Department 
 08：54：28,359 DEBUG AbstractFlushingEventListener：185  - 脏检查集合
 08：54：28,360 TRACE AbstractFlushingEventListener：200 - 刷新实体和处理引用集合
 08：54：28,365 TRACE AbstractEntityPersister：4097  -  epam.rest.entity.Department.name很脏
 08：54：28,366 TRACE DefaultFlushEntityEventListener：642  - 发现脏属性[ [epam.rest.entity.Department＃16]]：[Ljava.lang.String; @ 3aa8208a 
 08:54： 28,366 TRACE DefaultFlushEntityEventListener：281  - 更新实体：[epam.rest.entity.Department＃16] 
 08：54：28,371 TRACE AbstractFlushingEventListener：242  - 处理未引用的集合
 08：54：28,371 TRACE AbstractFlushingEventListener：254 - 调度集合删除/（重新）创建/更新
 08：54：28,372调试AbstractFlushingEventListener：118  - 刷新：0插入，1更新，0删除1个对象
 08：54：28,372调试AbstractFlushingEventListener： 125  - 刷新：0（重新创建），0更新，0清除到0集合
 08：54：28,373 DEBUG EntityPrinter：114  - 上市实体：
 08：54：28,373 DEBUG EntityPrinter：121  -  epam .rest.entity.Department {id = 16，name = REWQQ112} 
 08：54：28,373 TRACE AbstractFlushingEventListener：327  - 执行flush 
 08：54：28,383 TRACE AbstractEntityPersister：3166  - 更新实体：[epam .rest.entity.Department＃16] 
 08：54：28,384 TRACE AbstractServiceRegistryImpl：146  - 初始化服务[role = org.hibernate.engine.jdbc.b atch.spi.BatchBuilder] 
 08：54：28,391 TRACE AbstractServiceRegistryImpl：146  - 初始化服务[role = org.hibernate.service.jmx.spi.JmxService] 
 08：54：28,393 TRACE BatchBuilderImpl：68 - 构建批处理[size = 1] 
 08：54：28,395 DEBUG SQL：104  -  
更新
部门
 set 
 name =？ 
其中
 id =？ 
 08：54：28,397 TRACE JdbcCoordinatorImpl：319  - 注册语句[com.mysql.jdbc.JDBC4PreparedStatement@15f07169：更新部门set name = ** NOT SPECIFIED **其中id = ** NOT SPECIFIED **] 
 08：54：28,397 TRACE AbstractEntityPersister：2780  - 脱水实体：[epam.rest.entity.Department＃16] 
 08：54：28,399 TRACE BasicBinder：84  - 绑定参数[1]为[VARCHAR]  - REWQQ112 
 08：54：28,400 TRACE BasicBinder：84  - 绑定参数[2]为[BIGINT]  -  16 
 08：54：28,436 TRACE JdbcCoordinatorImpl：358  - 释放语句[com.mysql.jdbc.JDBC4PreparedStatement @ 15f07169：update departments set name ='REWQQ112'where id = 16] 
 08：54：28,437 TRACE JdbcCoordinatorImpl：476  - 关闭预准备语句[com.mysql.jdbc.JDBC4PreparedStatement@15f07169：update departments set name =' REWQQ112'，其中id = 16] 
 08：54：28,437 TRACE JdbcCoordinatorImpl：249  - 语句执行处理后启动[ON_CLOSE] 
 08：54：28,439 TRACE JdbcCoordinatorImpl：249  - 启动船尾er语句执行处理[ON_CLOSE] 
 08：54：28,440 DEBUG AbstractTransactionImpl：203  - 回滚
 08：54：28,480 DEBUG JdbcTransaction：164  - 滚动JDBC连接
 08：54：28,481 DEBUG JdbcTransaction：126  - 重新启用自动提交
 08：54：28,482 TRACE TransactionCoordinatorImpl：136  - 交易完成后
 08：54：28,486 TRACE SessionImpl：624  - 交易完成后
 08:54： 28,488 TRACE SessionImpl：342  - 关闭会话
 08：54：28,489 TRACE JdbcCoordinatorImpl：171  - 关闭JDBC容器[org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@26d77937] 
 08：54：28,490 DEBUG JdbcCoordinatorImpl：173  -  HHH000420：关闭未发布的批处理
 08：54：28,490 TRACE LogicalConnectionImpl：164  - 关闭逻辑连接
 08：54：28,491 DEBUG LogicalConnectionImpl：232  - 释放JDBC连接
 08 ：54：28,492 TRACE DriverManagerConnectionProviderImpl：233  - 将连接返回到池，池大小：1 
 08：54：28,493 DEBUG LogicalConnectionIm pl：250  - 已发布的JDBC连接
 08：54：28,493 TRACE LogicalConnectionImpl：176  - 已关闭逻辑连接
  
 
 
解决方案
我不确定，但我认为这是分离对象的问题。 
查看此链接 http://www.objectdb.com/java/jpa / persistence / detach  
 
I have a Spring MVC webapp using Hibernate, and my problem is that em.merge doesn't respond after the call.

Here is my Controller
@RequestMapping(value = "/updDep", method = RequestMethod.PUT)
      @ResponseBody
      public String updDeps(@RequestBody Department department ) {
        departmentService.addDepartment(department);
        System.out.println("after merge;  in controller");
        return "Success";
    }
And  Department Service class with addDepartment() method:
@Repository
public class DepartmentServiceImpl implements  DepartmentService {

    @PersistenceContext(unitName = "MyPersistenceUnit")
    private EntityManager entityManager;
....
//getter/setter entityManager....
...
 @Override
    @Transactional
    public void addDepartment(Department department) {
        System.out.println(department.getName() + " merge: " + department.getId());
        getEntityManager().merge(department);
        getEntityManager().flush();
        System.out.println("after");
    }
So i try to explain problem:
After addDepartment(Department department) method is called from my Controllers updDeps(..) method.
I see this in my servers log:
SECURITY23 merge: 3
Hibernate:
    select
        department0_.id as
        department0_.name a
    from
        departments departm
    where
        department0_.id=?
Hibernate:
    update
        departments
    set
        name=?
    where
        id=?
And that's all! Why did

System.out.println("after"); and System.out.println("after merge;  in controller"); not execute? After em.merge was called nothing happened.

And data in MySQL table still not updated.
But if I add  
department.setId(null);   
before, like that
@Transactional
    public void addDepartment(Department department) {
        department.setId(null);
        System.out.println(department.getName() + " merge: " + department.getId());
        getEntityManager().merge(department);
        getEntityManager().flush();
        System.out.println("after");
    }
All works and it created new instance in db, but I want update current.
What's the problem?
UPDATE 1
Project Structure:


PERSISTENCE.XML
 <persistence-unit name="MyPersistenceUnit" transaction-type="RESOURCE_LOCAL">
        <provider>org.hibernate.ejb.HibernatePersistence</provider>
        <properties>
            <property name="hibernate.connection.url" value="jdbc:mysql://localhost:3306/testbd"/>
            <property name="hibernate.connection.driver_class" value="com.mysql.jdbc.Driver"/>
            <property name="hibernate.connection.username" value="root"/>
            <property name="hibernate.connection.password" value="root"/>
            <!--<property name="hibernate.hbm2ddl.import_files" value= "import.sql"/>-->
            <property name="hibernate.show_sql" value="true"/>
            <property name="hibernate.format_sql" value="true"/>
            <property name="hibernate.hbm2ddl.auto" value="update"/>
            <property name="hibernate.dialect" value="org.hibernate.dialect.MySQLDialect"/>
        </properties>
    </persistence-unit>

</persistence>
SPRING CONFIG
 <mvc:annotation-driven />

    <context:annotation-config />
    <context:component-scan base-package="epam.rest" />

    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="prefix">
            <value>/WEB-INF/pages/</value>
        </property>
        <property name="suffix">
            <value>.jsp</value>
        </property>
    </bean>

    <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location">
            <value>classpath:jdbc.properties</value>
        </property>
    </bean>

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${jdbc.driverClassName}" />
        <property name="url" value="${jdbc.url}" />
        <property name="username" value="${jdbc.username}" />
        <property name="password" value="${jdbc.password}" />

    </bean>

    <bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
         <property name="persistenceUnitName" value="MyPersistenceUnit"/>
    </bean>

    <bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
        <property name="dataSource" ref="dataSource" />
        <property name="entityManagerFactory" ref="entityManagerFactory" />
    </bean>
    <tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true" />
</beans>
UPDATE 3
ADD MY LOG4J log in period of em.merge() transaction, where I founded ROLLBACK log but I dont know whats the problem?:
08:54:28,291 DEBUG LogicalConnectionImpl:218 - Obtained JDBC connection
08:54:28,291 DEBUG JdbcTransaction:69 - initial autocommit status: true
08:54:28,292 DEBUG JdbcTransaction:71 - disabling autocommit
08:54:28,301 TRACE IdentifierValue:139 - ID unsaved-value: null
08:54:28,302 TRACE AbstractSaveEventListener:504 - Detached instance of: epam.rest.entity.Department
08:54:28,304 TRACE DefaultMergeEventListener:245 - Merging detached instance
08:54:28,310 TRACE DefaultLoadEventListener:240 - Loading entity: [epam.rest.entity.Department#16]
08:54:28,311 TRACE DefaultLoadEventListener:403 - Attempting to resolve: [epam.rest.entity.Department#16]
08:54:28,311 TRACE DefaultLoadEventListener:427 - Object not resolved in any cache: [epam.rest.entity.Department#16]
08:54:28,312 TRACE AbstractEntityPersister:3923 - Fetching entity: [epam.rest.entity.Department#16]
08:54:28,312 DEBUG Loader:2109 - Loading entity: [epam.rest.entity.Department#16]
08:54:28,312 DEBUG SQL:104 - 
    select
        department0_.id as id1_0_0_,
        department0_.name as name2_0_0_ 
    from
        departments department0_ 
    where
        department0_.id=?
08:54:28,314 TRACE JdbcCoordinatorImpl:319 - Registering statement [com.mysql.jdbc.JDBC4PreparedStatement@6c31a161: select department0_.id as id1_0_0_, department0_.name as name2_0_0_ from departments department0_ where department0_.id=** NOT SPECIFIED **]
08:54:28,314 TRACE JdbcCoordinatorImpl:329 - Registering last query statement [com.mysql.jdbc.JDBC4PreparedStatement@6c31a161: select department0_.id as id1_0_0_, department0_.name as name2_0_0_ from departments department0_ where department0_.id=** NOT SPECIFIED **]
08:54:28,320 TRACE BasicBinder:84 - binding parameter [1] as [BIGINT] - 16
08:54:28,320 TRACE Loader:1909 - Bound [2] parameters total
08:54:28,321 TRACE JdbcCoordinatorImpl:374 - Registering result set [com.mysql.jdbc.JDBC4ResultSet@4e1d82e2]
08:54:28,322 TRACE Loader:937 - Processing result set
08:54:28,322 DEBUG Loader:942 - Result set row: 0
08:54:28,323 DEBUG Loader:1476 - Result row: EntityKey[epam.rest.entity.Department#16]
08:54:28,323 TRACE Loader:1652 - Initializing object from ResultSet: [epam.rest.entity.Department#16]
08:54:28,333 TRACE AbstractEntityPersister:2844 - Hydrating entity: [epam.rest.entity.Department#16]
08:54:28,334 TRACE BasicExtractor:74 - Found [REWQQ] as column [name2_0_0_]
08:54:28,337 TRACE Loader:962 - Done processing result set (1 rows)
08:54:28,338 TRACE Loader:1106 - Total objects hydrated: 1
08:54:28,338 DEBUG TwoPhaseLoad:158 - Resolving associations for [epam.rest.entity.Department#16]
08:54:28,343 DEBUG TwoPhaseLoad:277 - Done materializing entity [epam.rest.entity.Department#16]
08:54:28,344 TRACE JdbcCoordinatorImpl:358 - Releasing statement [com.mysql.jdbc.JDBC4PreparedStatement@6c31a161: select department0_.id as id1_0_0_, department0_.name as name2_0_0_ from departments department0_ where department0_.id=16]
08:54:28,344 TRACE JdbcCoordinatorImpl:519 - Closing result set [com.mysql.jdbc.JDBC4ResultSet@4e1d82e2]
08:54:28,345 TRACE JdbcCoordinatorImpl:476 - Closing prepared statement [com.mysql.jdbc.JDBC4PreparedStatement@6c31a161: select department0_.id as id1_0_0_, department0_.name as name2_0_0_ from departments department0_ where department0_.id=16]
08:54:28,345 TRACE JdbcCoordinatorImpl:249 - Starting after statement execution processing [ON_CLOSE]
08:54:28,345 TRACE StatefulPersistenceContext:1022 - Initializing non-lazy collections
08:54:28,346 DEBUG Loader:2133 - Done entity load
08:54:28,352 TRACE UnresolvedEntityInsertActions:121 - No entity insert actions have non-nullable, transient entity dependencies.
08:54:28,353 DEBUG AbstractTransactionImpl:173 - committing
08:54:28,353 TRACE SessionImpl:403 - Automatically flushing session
08:54:28,353 TRACE AbstractFlushingEventListener:82 - Flushing session
08:54:28,355 DEBUG AbstractFlushingEventListener:144 - Processing flush-time cascades
08:54:28,358 TRACE Cascade:151 - Processing cascade ACTION_PERSIST_ON_FLUSH for: epam.rest.entity.Department
08:54:28,359 TRACE Cascade:188 - Done processing cascade ACTION_PERSIST_ON_FLUSH for: epam.rest.entity.Department
08:54:28,359 DEBUG AbstractFlushingEventListener:185 - Dirty checking collections
08:54:28,360 TRACE AbstractFlushingEventListener:200 - Flushing entities and processing referenced collections
08:54:28,365 TRACE AbstractEntityPersister:4097 - epam.rest.entity.Department.name is dirty
08:54:28,366 TRACE DefaultFlushEntityEventListener:642 - Found dirty properties [[epam.rest.entity.Department#16]] : [Ljava.lang.String;@3aa8208a
08:54:28,366 TRACE DefaultFlushEntityEventListener:281 - Updating entity: [epam.rest.entity.Department#16]
08:54:28,371 TRACE AbstractFlushingEventListener:242 - Processing unreferenced collections
08:54:28,371 TRACE AbstractFlushingEventListener:254 - Scheduling collection removes/(re)creates/updates
08:54:28,372 DEBUG AbstractFlushingEventListener:118 - Flushed: 0 insertions, 1 updates, 0 deletions to 1 objects
08:54:28,372 DEBUG AbstractFlushingEventListener:125 - Flushed: 0 (re)creations, 0 updates, 0 removals to 0 collections
08:54:28,373 DEBUG EntityPrinter:114 - Listing entities:
08:54:28,373 DEBUG EntityPrinter:121 - epam.rest.entity.Department{id=16, name=REWQQ112}
08:54:28,373 TRACE AbstractFlushingEventListener:327 - Executing flush
08:54:28,383 TRACE AbstractEntityPersister:3166 - Updating entity: [epam.rest.entity.Department#16]
08:54:28,384 TRACE AbstractServiceRegistryImpl:146 - Initializing service [role=org.hibernate.engine.jdbc.batch.spi.BatchBuilder]
08:54:28,391 TRACE AbstractServiceRegistryImpl:146 - Initializing service [role=org.hibernate.service.jmx.spi.JmxService]
08:54:28,393 TRACE BatchBuilderImpl:68 - Building batch [size=1]
08:54:28,395 DEBUG SQL:104 - 
    update
        departments 
    set
        name=? 
    where
        id=?
08:54:28,397 TRACE JdbcCoordinatorImpl:319 - Registering statement [com.mysql.jdbc.JDBC4PreparedStatement@15f07169: update departments set name=** NOT SPECIFIED ** where id=** NOT SPECIFIED **]
08:54:28,397 TRACE AbstractEntityPersister:2780 - Dehydrating entity: [epam.rest.entity.Department#16]
08:54:28,399 TRACE BasicBinder:84 - binding parameter [1] as [VARCHAR] - REWQQ112
08:54:28,400 TRACE BasicBinder:84 - binding parameter [2] as [BIGINT] - 16
08:54:28,436 TRACE JdbcCoordinatorImpl:358 - Releasing statement [com.mysql.jdbc.JDBC4PreparedStatement@15f07169: update departments set name='REWQQ112' where id=16]
08:54:28,437 TRACE JdbcCoordinatorImpl:476 - Closing prepared statement [com.mysql.jdbc.JDBC4PreparedStatement@15f07169: update departments set name='REWQQ112' where id=16]
08:54:28,437 TRACE JdbcCoordinatorImpl:249 - Starting after statement execution processing [ON_CLOSE]
08:54:28,439 TRACE JdbcCoordinatorImpl:249 - Starting after statement execution processing [ON_CLOSE]
08:54:28,440 DEBUG AbstractTransactionImpl:203 - rolling back
08:54:28,480 DEBUG JdbcTransaction:164 - rolled JDBC Connection
08:54:28,481 DEBUG JdbcTransaction:126 - re-enabling autocommit
08:54:28,482 TRACE TransactionCoordinatorImpl:136 - after transaction completion
08:54:28,486 TRACE SessionImpl:624 - after transaction completion
08:54:28,488 TRACE SessionImpl:342 - Closing session
08:54:28,489 TRACE JdbcCoordinatorImpl:171 - Closing JDBC container [org.hibernate.engine.jdbc.internal.JdbcCoordinatorImpl@26d77937]
08:54:28,490 DEBUG JdbcCoordinatorImpl:173 - HHH000420: Closing un-released batch
08:54:28,490 TRACE LogicalConnectionImpl:164 - Closing logical connection
08:54:28,491 DEBUG LogicalConnectionImpl:232 - Releasing JDBC connection
08:54:28,492 TRACE DriverManagerConnectionProviderImpl:233 - Returning connection to pool, pool size: 1
08:54:28,493 DEBUG LogicalConnectionImpl:250 - Released JDBC connection
08:54:28,493 TRACE LogicalConnectionImpl:176 - Logical connection closed

解决方案
I am not sure but I think that's problem with 'detached' objects.
Look at this link http://www.objectdb.com/java/jpa/persistence/detach

                        
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