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POHibernate calls flush on find- causes not-null error
 

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    <p>I have a process which updates a tree to the database, and in doing so, performs reads to check for duplicates entities.</p> <p>I'm finding that trying to do a criteria.uniqueResult() midway through this process causes the following error:</p> <blockquote> <p>org.hibernate.PropertyValueException: not-null property references a null or transient value</p> </blockquote> <p>Digging through the stack trace, I see that the uniqueResult() is flushing the session, attempting to perform updates that aren't ready to go to the database yet.</p> <pre><code>at org.hibernate.engine.Cascade.cascade(Cascade.java:153) at org.hibernate.event.def.AbstractFlushingEventListener.cascadeOnFlush(AbstractFlushingEventListener.java:154) at org.hibernate.event.def.AbstractFlushingEventListener.prepareEntityFlushes(AbstractFlushingEventListener.java:145) at org.hibernate.event.def.AbstractFlushingEventListener.flushEverythingToExecutions(AbstractFlushingEventListener.java:88) at org.hibernate.event.def.DefaultAutoFlushEventListener.onAutoFlush(DefaultAutoFlushEventListener.java:58) at org.hibernate.impl.SessionImpl.autoFlushIfRequired(SessionImpl.java:996) at org.hibernate.impl.SessionImpl.list(SessionImpl.java:1589) at org.hibernate.impl.CriteriaImpl.list(CriteriaImpl.java:306) at org.hibernate.impl.CriteriaImpl.uniqueResult(CriteriaImpl.java:328) at com.inversion.dal.BaseDAO.findUniqueByCriterion(BaseDAO.java:59) </code></pre> <p>Have I set something up wrong here?</p> <p>Any help greatly appreciated.</p> <p>Marty</p>
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