Question

关于Hibernate继承映射抛出的异常（一个类一张表）

Exception in thread "main" org.hibernate.StaleStateException: Batch update returned unexpected row count from update [1]; actual row count: 0; expected: 1
at org.hibernate.jdbc.Expectations$BasicExpectation.checkBatched(Expectations.java:61)
at org.hibernate.jdbc.Expectations$BasicExpectation.verifyOutcome(Expectations.java:46)
at org.hibernate.jdbc.BatchingBatcher.checkRowCounts(BatchingBatcher.java:68)
at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:237)
at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:145)
at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
at org.hibernate.impl.SessionImpl.managedFlush(SessionImpl.java:338)
at org.hibernate.transaction.JDBCTransaction.commit(JDBCTransaction.java:106)
at com.xie.ManyToOne.add(ManyToOne.java:121)
at com.xie.ManyToOne.main(ManyToOne.java:22)
hbm.xml配置如下：
<hibernate-mapping package="com.xie.domain">
<class name="Employee" >
<id name="id">
<generator class="hilo"/>
</id>
<property name="name" unique="true"/>
<many-to-one name="depart" column="depart_id"/>
<union-subclass name="Skiller" table="skiller">
<property name="skill"/>
</union-subclass>
<union-subclass name="Sales" table="sales">
<property name="sell"/>
</union-subclass>
</class>
</hibernate-mapping>
请问问题出在哪儿？？

Answer 1

StaleStateException这个异常应该是不是在同一个session中管理所以导致这种错误
session处理的对象不是persistent对象