identifier of an instance of xxx was altered from 1 to 1

今天测试一个项目，这个项目使用了hibernate和spring，报错信息如下：

org.springframework.orm.hibernate4.HibernateSystemException: identifier of an instance of com.tdr.push.entity.ThreadPushFail was altered from 1 to 1; nested exception is org.hibernate.HibernateException: identifier of an instance of com.tdr.push.entity.ThreadPushFail was altered from 1 to 1

后来发现是因为实体类中id的属性和hbm.xml配置文件中id的属性不一致造成的。

我实体类中的id属性是：

public class ThreadPushFail {
	private long id;
	/***
	 * 推送消息的id
	 */
	private long pushMessageId;

hbm.xml配置文件中id的属性：

<hibernate-mapping>
    <class name="com.tdr.push.entity.ThreadPushFail" table="t_threadPushFail" lazy="true">
        <id name="id" type="int">
            <column name="ID" precision="19" scale="0">
                <comment>主键id</comment>
            </column>
            <generator class="identity"/>
        </id>

一个是int，一个是long

解决方案：是id的属性保持一致。

参考：http://www.52php.cn/article/p-hzgpvqlx-baw.html