org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role:XXX
2014-06-27 18:43
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org.hibernate.LazyInitializationException: failed to lazily initialize a collection of role: com.zznode.inms.pdm.data.ProjectBatchUpdateTask.devicePrjChangeTasks, no session or session was closed at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationException(AbstractPersistentCollection.java:358) at org.hibernate.collection.AbstractPersistentCollection.throwLazyInitializationExceptionIfNotConnected(AbstractPersistentCollection.java:350) at org.hibernate.collection.AbstractPersistentCollection.readSize(AbstractPersistentCollection.java:97) at org.hibernate.collection.PersistentSet.size(PersistentSet.java:114)
原因：在hibernate的映射关系中由于延迟加载，之前的操作使session已经关闭，所以加载set属性时无可用session
解决办法：在映射文件中设置set属性 lazy='false'
<set name="devicePrjChangeTasks" lazy="false" cascade="delete" inverse="true"> <!-- 主键对应的关联表外键 --> <key column="prj_update_task_id"></key> <!-- 关联表 --> <one-to-many class="com.zznode.inms.pdm.data.ProjectUpdateTemp"/> </set>
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