[google-appengine] Could not get constructor for org.hibernate.persister.entity.SingleTableEntityPersister

[Montassar Dridi]

I keep getting this error after deploying my application successfully 
through eclipse to the app engine

org.springframework.beans.factory.BeanCreationException: Error creating 
bean with name 'annotationSessionFactory' defined in ServletContext 
resource [/WEB-INF/spring/applicationContext-system.xml]: Invocation of 
init method failed; nested exception is org.hibernate.MappingException: 
Could not get constructor for 
org.hibernate.persister.entity.SingleTableEntityPersister at 
org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1574)
 
at .......

applicationContext-system.xml

<property name="dataSource" ref="dataSource" />

    <property name="hibernateProperties">
        <props>
            <prop key="hibernate.connection.driver_class">${db_driver}</prop>
            <prop key="hibernate.connection.username">${db_username}</prop>
             <prop key="hibernate.connection.password">${db_password}</prop>
            <prop 
key="hibernate.connection.url">${db_uri}${db_name}?user=${db_username}&amp;password=${db_password}</prop>
            <prop 
key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
            <prop key="hibernate.dialect">
                ${hibernate.dialect}
            </prop>
            <prop key="hibernate.show_sql">
                ${hibernate.show_sql}
            </prop>
            <prop key="hibernate.generate_statistics">
                ${hibernate.generate_statistics}
            </prop>
            <prop key="hibernate.cache.use_second_level_cache">
                false
            </prop>
            <prop key="hibernate.cache.use_query_cache">false</prop>
            <prop 
key="hibernate.connection.provider_class">org.hibernate.connection.C3P0ConnectionProvider
            </prop>
            <prop key="hibernate.c3p0.max_size">40</prop> <!-- was 60 -->
            <prop key="hibernate.c3p0.min_size">5</prop>
            <prop key="hibernate.c3p0.timeout">60</prop> <!-- was 1800 -->
            <prop key="hibernate.c3p0.max_statements">100</prop>
            <prop key="hibernate.c3p0.idle_test_period">60</prop>
            <prop key="hibernate.c3p0.acquire_increment">5</prop>
            <prop key="hibernate.c3p0.acquireRetryAttempts">4</prop> <!-- added 
-->
            <prop key="hibernate.c3p0.acquireRetryDelay">5000</prop> <!-- added 
-->
            <prop key="hibernate.c3p0.preferredTestQuery">SELECT 1</prop> <!-- 
added -->
            <prop key="hibernate.c3p0.idleConnectionTestPeriod">100</prop> <!-- 
added -->
            <prop key="hibernate.c3p0.testConnectionOnCheckin">true</prop> <!-- 
added -->
            <prop key="hibernate.c3p0.validate">true</prop>
            <prop key="hibernate.c3p0.testConnectionOnCheckout">true</prop>
            <prop key="myeclipse.connection.profile">hl3000</prop>
            <prop key="hibernate.c3p0.unreturnedConnectionTimeout">200</prop>
            <prop 
key="hibernate.c3p0.debugUnreturnedConnectionStackTraces">true</prop>

            <prop key="hibernate.enable_lazy_load_no_trans">true</prop>
        </props>
    </property>
    <property name="entityInterceptor">
        <bean 
class="com.ish.core.persistence.hibernate.TimestampedEntityInterceptor" />
    </property>

    <property name="mappingDirectoryLocations" 
ref="hibernateMappingDirectories" />
    <property name="packagesToScan" ref="hibernateAnnotatedPackages"/>
</bean>

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