This week's book giveaways are in the AI and JavaScript forums.
We're giving away four copies each of GANs in Action and WebAssembly in Action and have the authors on-line!
See this thread and this one for details.
Win a copy of GANs in ActionE this week in the AI forum
or WebAssembly in Action in the JavaScript forum!
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Bear Bibeault
  • Paul Clapham
  • Jeanne Boyarsky
  • Knute Snortum
Sheriffs:
  • Liutauras Vilda
  • Tim Cooke
  • Junilu Lacar
Saloon Keepers:
  • Ron McLeod
  • Stephan van Hulst
  • Tim Moores
  • Tim Holloway
  • Carey Brown
Bartenders:
  • Joe Ess
  • salvin francis
  • fred rosenberger

Hibernate causing Concurrent Modification Exception

 
Greenhorn
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
Hibernate 2.18 and JBOSS 4.0.0 and MYSQL 4.1

Please could someone assist with this bizarre problem:

whenever i attempt an UPDATE of a loaded object i get a ConcurrentModificationException. All I am doing is
1) get new session from sessionfactory
2) load object
3) change object
4) commit changes

I have Hibernate working within a stateless session bean environment with business methods such as add,update etc called using an axis webservice.
The code is as simple as

Session session=null;
CollectionDetailsType colDetails=null;
CollectionDetailsTypeImpl();
try{
//open session
session=sf.openSession();
//begin transaction
net.sf.hibernate.Transaction t=session.beginTransaction();
//load db object
colDetails=(CollectionDetailsType)session.getCollectionDetailsTypeImpl.class,new Integer(1));
//change something
colDetails.setInitialDebt(new Double(1.00));
//commit
t.commit();
session.close();
}catch(HibernateException he){

Does anyone have any ideas as to why on earth this is happening in such a simple case of update?
 
Anton Lokotsch
Greenhorn
Posts: 3
  • Mark post as helpful
  • send pies
  • Quote
  • Report post to moderator
We suspected it was a mapping issue. All our cascades were set to "all". So we played with the various options. Eventually cascade="delete-orphan" allows the update to complete without any ConcurrentModificationException. The Hibernate book states that this "will delete any persistent entity instance that has been removed (dereferenced) from the association (for example, from a collection)"

The reason why I have orphans is puzzling. Any ideas? Below is the mapping:

<hibernate-mapping>

<!-- Collection-->
<class name="za.co.lawactive.tpe.dao.impl.CollectionImpl"
table="collection">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="idNo"/>
<property name="branch"/>
<property name="status" />
<property name="department"/>
<property name="province"/>
<property name="division"/>

<bag name="transaction" cascade="delete-orphan" inverse="false" lazy="false">
<key column="collectionID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.TransactionTypeImpl"/>
</bag>

<bag name="collectionDetails" cascade="delete-orphan" inverse="false" lazy="false">
<key column="collectionID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.CollectionDetailsTypeImpl"/>
</bag>

<bag name="party" cascade="delete-orphan" inverse="false" lazy="false">
<key column="collectionID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.PartyTypeImpl"/>
</bag>

</class>

<!-- Address -->
<class name="za.co.lawactive.tpe.dao.impl.AddressTypeImpl"
table="address"
dynamic-update="false">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="type"/>
<property name="line1" />
<property name="line2"/>
<property name="line3"/>
<property name="line4"/>
<property name="code" />
<property name="actionDate" />

<many-to-one name="party" class="za.co.lawactive.tpe.dao.impl.PartyTypeImpl" column="partyID"/>

</class>

<!-- Party -->
<class name="za.co.lawactive.tpe.dao.impl.PartyTypeImpl"
table="party" dynamic-update="false">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="lastName"/>
<property name="firstNames"/>
<property name="title"/>
<property name="initials"/>
<property name="homeTel"/>
<property name="workTel"/>
<property name="cellTel"/>
<property name="otherTel"/>
<property name="email" />
<property name="idNo"/>
<property name="maritalStatus"/>

<bag name="address" cascade="delete-orphan" inverse="false" lazy="false">
<key column="partyID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.AddressTypeImpl"/>
</bag>

<many-to-one name="collection" class="za.co.lawactive.tpe.dao.impl.CollectionImpl" column="collectionID"/>
</class>

<!-- CollectionDetails-->
<class name="za.co.lawactive.tpe.dao.impl.CollectionDetailsTypeImpl"
table="collectiondetails"
dynamic-update="false">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="initialDebt"/>
<property name="accountNo" />
<property name="balanceOutstanding"/>
<property name="arrearAmount" />
<property name="arrearInterest" />
<property name="agreementType" />
<property name="agreementDate" />
<property name="lastPaymentDate" />
<property name="lastPayment" />

<bag name="assetDescription" cascade="delete-orphan" inverse="false" lazy="false">
<key column="collectionDetailsID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.AssetDescriptionTypeImpl"/>
</bag>

<many-to-one name="collection" class="za.co.lawactive.tpe.dao.impl.CollectionImpl" column="collectionID"/>

</class>

<class name="za.co.lawactive.tpe.dao.impl.AssetDescriptionTypeImpl"
table="assetdescription">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>
<property name="description"/>

<many-to-one name="collectionDetails" class="za.co.lawactive.tpe.dao.impl.CollectionDetailsTypeImpl" column="collectionDetailsID"/>

</class>



<!-- Description -->
<class name="za.co.lawactive.tpe.dao.impl.TransactionDescriptionTypeImpl"
table="transactiondescription">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>
<property name="description"/>

<many-to-one name="transaction" class="za.co.lawactive.tpe.dao.impl.TransactionTypeImpl" column="transactionID"/>

</class>



<!-- Transaction-->
<class name="za.co.lawactive.tpe.dao.impl.TransactionTypeImpl"
table="transaction">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="collectionID" update="false" insert="false"/>
<property name="messageID" />
<property name="accountNo" />
<property name="sender"/>
<property name="senderUser" />
<property name="recipient"/>
<property name="recipientUser"/>
<property name="status"/>
<property name="date" />
<property name="actionDate" />

<bag name="transactionDescription" cascade="delete-orphan" inverse="false" lazy="false">
<key column="transactionID"/>
<one-to-many class="za.co.lawactive.tpe.dao.impl.TransactionDescriptionTypeImpl"/>
</bag>

<many-to-one name="collection" class="za.co.lawactive.tpe.dao.impl.CollectionImpl" column="collectionID"/>

</class>

<class name="za.co.lawactive.tpe.dao.TimerSetup"
table="TimerSetup">
<id name="messageID" column="messageID" type="java.lang.Integer" unsaved-value="null">
<generator class="assigned" />
</id>

<property name="action"/>
<property name="waitMT"/>
<property name="duration"/>
<property name="reflexMT"/>


</class>

<class name="za.co.lawactive.tpe.dao.Timers"
table="Timers">
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="colID"/>
<property name="accountNo"/>
<property name="MTWatch"/>
<property name="expiredMT"/>
<property name="endTime"/>
<property name="recipient"/>

</class>
<class name="za.co.lawactive.tpe.util.panel.dao.impl.PanelItemTypeImpl"
table="userpanel"
dynamic-update="false"
>
<id name="id" column="id" type="java.lang.Integer" unsaved-value="null">
<generator class="identity" />
</id>

<property name="lawUserID"/>
<property name="parentID"/>
<property name="userTypeCode"/>
<property name="regionCode"/>
<property name="userName"/>
<property name="rating"/>

</class>

<class name="za.co.lawactive.tpe.util.messages.dao.impl.MessageTypeImpl"
table="messagetypes">
<id name="messageID" column="messageID" type="java.lang.Integer" unsaved-value="null">
<generator class="assigned" />
</id>
<property name="description"/>
<property name="userTypeCode"/>
</class>



</hibernate-mapping>
 
Willie Smits can speak 40 languages. This tiny ad can speak only one:
Java file APIs (DOC, XLS, PDF, and many more)
https://products.aspose.com/total/java
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
Boost this thread!