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org.hibernate.NonUniqueObjectException

Posted on 2013-01-07
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Last Modified: 2013-01-17
Hi All,

Please advise on what we should do to prevent the following exception.

-10.60.5.39-8643-8) MKOCO95200M42Q0 : a different object with the same identifier value was already associated with the session: web.enrollment.bean.organization.EnrollmentAccomodationsBean#308: org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: web.enrollment.bean.organization.EnrollmentAccomodationsBean#308
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Question by:somaghoshCU
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ivanovn earned 300 total points
ID: 38764767
The Java objects and Hibernate objects are handled differently. In this case, you have opened a hibernate session and associated an object to that identifier. So when you try to merge in a new java object within the same hibernate session, that identifier is already used in hibernate cache and you get that exception.

What you should do is either complete the merge of the initial object and close or clear the session, or evict the hibernate object from the cache before reusing the identifier.

Chapter 11 of the documentation contains most of the information you need:
http://docs.jboss.org/hibernate/orm/4.1/manual/en-US/html/ch11.html

For the rest of the documentation see:
http://docs.jboss.org/hibernate/orm/4.1/manual/en-US/html/
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