Hibernate发布了insert语句，但没有保存到数据库

Question

我正在尝试将新记录插入到我的mysql数据库中; Hibernate insert语句打印在日志中，但数据库不插入新记录。没有发布错误，但我的rpcService调用打印了我的onFailure消息。另外：我的应用程序从数据库中读取就好了，所以我的应用程序的其他部分运行良好。下面是代码和配置：

hibernate.cfg.xml中：

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-configuration PUBLIC
            "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
            "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd">

<hibernate-configuration>
<session-factory>
    <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
    <property name="hibernate.connection.password">xxxxxxxx</property>
    <property name="hibernate.connection.url">jdbc:mysql://xxxxxxxxx.us-west-1.rds.amazonaws.com/xxxxxxx</property>
    <property name="hibernate.connection.username">xxxxxx</property>
    <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>

    <!-- configuration pool via c3p0-->
            <property name="c3p0.acquire_increment">1</property>
            <property name="c3p0.idle_test_period">100</property> <!-- seconds -->
            <property name="c3p0.max_size">20</property>
            <property name="c3p0.max_statements">20</property>
            <property name="c3p0.min_size">5</property>
            <property name="c3p0.timeout">1800</property> <!-- seconds -->

    <property name="transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</property>
    <property name="current_session_context_class">thread</property>
    <property name="hibernate.show_sql">true</property>
    <!--  <property name="hbm2ddl.auto">update</property>-->
    <mapping class="com.local.shared.School"/>
    <mapping class="com.local.shared.SchoolVideo"/>
    <mapping class="com.local.shared.Category"/>
    <mapping class="com.local.shared.Administrator"/>
</session-factory>
</hibernate-configuration>

rpcService call：

@Override
public void doUpdateSchoolVideo(SchoolVideo schoolVideo) {
    rpcService.updateSchoolVideo(schoolVideo,
            new AsyncCallback<SchoolVideo>() {

                public void onFailure(Throwable caught) {
                    caught.printStackTrace();
                    new Exception().printStackTrace();
                    Window.alert("Couldn't update schoolVideo info!");
                }

                public void onSuccess(SchoolVideo schoolVideo) {
                    System.out.println("SchoolVideo table updated!");
                    loadSubmittedVideos(Utilities.getSchoolPage()
                            .getSchool_name());
                }
            });
}

rpcService实施：

@Override
public SchoolVideo updateSchoolVideo(SchoolVideo schoolVideo) {
    System.out.println("Attempting to save the schoolVideo information"
            + "\n");
    Transaction tx = null;
    Session session = SessionFactoryUtil.getInstance().getCurrentSession();
    HttpServletRequest httpServletRequest = this.getThreadLocalRequest();
    HttpSession httpSession = httpServletRequest.getSession(false);
    School sessionSchool = (School) httpSession.getAttribute("school");
    System.out.println("\n updateSchoolVideo school in session is " +
                        " = " + sessionSchool.getSchool_name() + "\n");

    try {
        tx = session.beginTransaction();

        School school = sessionSchool;
        System.out.println("\n cachedSchool = " + school + "\n");
        School querySchool = (School) session.get(School.class,
                new Integer(school.getId()));
        System.out.println(querySchool.getId() + " equals id");
        schoolVideo.setSchool_id(querySchool);
        schoolVideo.setReviewed(1);
        System.out.println(schoolVideo.getVideo_name() + " videoname");
        session.save(schoolVideo);
        System.out.println("\n Video Should have been saved in database after upload \n");
        tx.commit();

    } catch (RuntimeException e) {
        if (tx != null && tx.isActive()) {
            try {
                tx.rollback();
            } catch (HibernateException e1) {
                e1.printStackTrace();
            }
            throw e;
        }
    }
    return schoolVideo;
}

我的loggin语句显示了Hibernate插入： Hibernate：插入SchoolVideo（category，image_name，review，school_id，video_name）值（？，？，？，？，？）

因此，我的rpcServiceImpl方法一直执行session.save（）方法调用。直接在它之后的print语句不打印，所以我知道一切都死了。任何人都知道如何我现在可以跟踪这个db插入的缺乏。