Home » Java » Enterprise Java » Upgrading Spring 3.x and Hibernate 3.x to Spring Platform 1.0.1 (Spring + hibernate 4.x)

About Brian Du Preez

Brian Du Preez

Upgrading Spring 3.x and Hibernate 3.x to Spring Platform 1.0.1 (Spring + hibernate 4.x)

I recent volunteered to upgrade our newest project to the latest version of Spring Platform. What Spring Platform gives you is dependency & plugin management across the whole Spring framework’s set of libraries.

Since we had fallen behind a little the upgrade did raise some funnies. Here are the things I ran into:



Our pom files were still referencing:

These artefacts don’t exit on the latest version, so replaced those with hibernate-core.jar and ehcache-core.jar.

We also still use the hibernate tools + maven run plugin to reverse engineer our db object. This I needed to update to a release candidate:

<hibernate-tools .version="">4.3.1.CR1</hibernate-tools>


The code: “Hibernate.createBlob”… no longer exists

replaced with:

private Blob createBlob(final byte[] bytes) {
return NonContextualLobCreator.INSTANCE.wrap(NonContextualLobCreator.INSTANCE.createBlob(bytes));

On the HibernateTemplate return types are now List; not element…So needed to add casts for the lists being returned.

import org.hibernate.classic.Session;

replaced with:

import org.hibernate.Session;

Reverse engineer works a little differently…
Assigns Long to numeric…

 <sql-type jdbc-type="NUMERIC" precision="4" hibernate-type="java.lang.Integer" />
 <sql-type jdbc-type="NUMERIC" precision="6" hibernate-type="java.lang.Integer" />
 <sql-type jdbc-type="NUMERIC" precision="8" hibernate-type="java.lang.Integer" />
 <sql-type jdbc-type="NUMERIC" precision="10" hibernate-type="java.lang.Long" />
 <sql-type jdbc-type="DECIMAL" precision='4' scale='0' hibernate-type="java.lang.Integer" not-null="true"/>
 <sql-type jdbc-type="DECIMAL" precision='6' scale='0' hibernate-type="java.lang.Integer" not-null="true"/>
 <sql-type jdbc-type="DATE" hibernate-type="java.util.Date"/>

Possible Errors:

  • Caused by: org.hibernate.service.UnknownUnwrapTypeException: Cannot unwrap to requested type [javax.sql.DataSource]

Add a dependency for c3p0:


And configure the settings in the cfg.xml for it:

<property name="hibernate.c3p0.min_size">5</property>
<property name="hibernate.c3p0.max_size">20</property>
<property name="hibernate.c3p0.timeout">300</property>
<property name="hibernate.c3p0.max_statements">50</property>
<property name="hibernate.c3p0.idle_test_period">3000</property>
  • Caused by: java.lang.ClassNotFoundException: org.hibernate.engine.FilterDefinition

Probably still using a reference to hibernate3 factory / bean somewhere, change to hibernate4:

  • Caused by: java.lang.ClassNotFoundException: Could not load requested class : org.hibernate.hql.classic.ClassicQueryTranslatorFactory There is minor change in new APIs, so this can be resolved by replacing property value with:


Amazingly some of our application context files still referenced the Spring DTD … replaced with XSD:

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

In Spring configs added for c3p0:

<prop key="hibernate.c3p0.min_size">5</prop>
<prop key="hibernate.c3p0.max_size">20</prop>
<prop key="hibernate.c3p0.timeout">300</prop>
<prop key="hibernate.c3p0.max_statements">50</prop>
<prop key="hibernate.c3p0.idle_test_period">3000</prop>

Spring removed the “local”=: so needed to just change that to “ref”=

Spring HibernateDaoSupport no longer has: “releaseSession(session);”, which is a good thing so was forced to update the code to work within a transaction.

Possible Errors:

  • getFlushMode is not valid without active transaction; nested exception is org.hibernate.HibernateException: getFlushMode is not valid without active transaction

Removed from hibernate properties:

<prop key="hibernate.current_session_context_class">thread</prop>


Supply a custom strategy for the scoping of the “current”Session. See Section 2.5, “Contextual sessions” for more information about the built-in strategies


  • org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove ‘readOnly’ marker from transaction definition.

Another option is :

<bean id ="productHibernateTemplate" class="org.springframework.orm.hibernate4.HibernateTemplate">
<property name="sessionFactory" ref="productSessionFactory"/>
<property name="checkWriteOperations" value="false"/>
  • java.lang.NoClassDefFoundError: javax/servlet/SessionCookieConfig

Servlet version update:

  • Then deploying on weblogic javassist: $$_javassist_  cannot be cast to javassist.util.proxy.Proxy

The issue here was that there were different versions of javassist being brought into the ear. I all references removed from all our poms, so that the correct version gets pulled in from from Spring/Hibernate…

and then configured weblogic to prefer our version:

<?xml version="1.0" encoding="UTF-8"?>
(0 rating, 0 votes)
You need to be a registered member to rate this.
1 Comment Views Tweet it!
Do you want to know how to develop your skillset to become a Java Rockstar?
Subscribe to our newsletter to start Rocking right now!
To get you started we give you our best selling eBooks for FREE!
1. JPA Mini Book
2. JVM Troubleshooting Guide
3. JUnit Tutorial for Unit Testing
4. Java Annotations Tutorial
5. Java Interview Questions
6. Spring Interview Questions
7. Android UI Design
and many more ....
I agree to the Terms and Privacy Policy

Leave a Reply

1 Comment threads
0 Thread replies
Most reacted comment
Hottest comment thread
1 Comment authors
PikBadaluk Recent comment authors

This site uses Akismet to reduce spam. Learn how your comment data is processed.

newest oldest most voted
Notify of

I just did the same kind of migration, I also removed [hibernate.current_session_context_class] but not sure why, I had a try-change-try approach and noticed that {absent} property looks (now?) like a distinct value, different from what was default [thread]. Do you know something more about this ?