Hi Everyone,

The following is my hibernate mapping file.

<hibernate-mapping>
<class name="com.isd.cdm.dao.replicate.Activity" table="VB03ACTV" >
<id name="messageID" column="ACTV_ID">
<generator class="assigned"/>
</id>
<property name="activitySummary" type="java.lang.String">
<column name="ACTVY_SUMMY" length="10"/>
</property>
<set name="messages" table="VB21AUTR" lazy="false" cascade="all,delete-orphan" >
<key column="ACTV_ID" unique="false"/>
<one-to-many class="com.isd.cdm.dao.replicate.Message" />
</set>
</class>
</hibernate-mapping>

<hibernate-mapping>
<class name="com.isd.cdm.dao.replicate.Message" table="VB21AUTR" >
<composite-id>
<key-property name="activityMessageID" column="ACTV_ID" />
<key-property name="systemID" column="HOST_IMS_SYS_ID" />
</composite-id>
<property name="activityMessage" type="java.lang.String">
<column name="AUDIT_TRAIL" length="3600"/>
</property>
</class>
</hibernate-mapping>

When I try to save this parent+child I get the following exception.

org.springframework.orm.hibernate3.HibernateSystem Exception: a different object with the same identifier value was already associated with the session: [com.isd.cdm.dao.replicate.Message#com.isd.cdm.dao. replicate.Message@396591ce]; nested exception is org.hibernate.NonUniqueObjectException: a different object with the same identifier value was already associated with the session: [com.isd.cdm.dao.replicate.Message#com.isd.cdm.dao. replicate.Message@396591ce]


The biggest issue is that, this exception occurs only some time, and even it is very diff for me recreate the issue. Googled and found that I need to use saveOrUpdate() / merge() OR remove cascade="all" to fix this. But when I try that I cant recreate the issue.

My question is like, if there is a reference problem, why does it save well sometimes and gets me this error occasionally.

Thanks in advance for your valuable reply.