groovy + spring integration jpa: linkage error - jpa

Question

Using Spring integration JPA + Groovy
I got the following error:
Could not instantiate bean class [org.springframework.integration.jpa.core.JpaExecutor]: Constructor threw exception; nested exception is java.lang.LinkageError: loader constraint violation: loader (instance of groovy/lang/GroovyClassLoader) previously initiated loading for a different type with name "javax/persistence/LockModeType"
Here are my dependencies :
dependencies {
compile 'org.springframework.integration:spring-integration-jpa:3.0.4.RELEASE'
compile 'org.apache.openjpa:openjpa:2.3.0'
compile group: 'hsqldb', name: 'hsqldb', version: '1.8.0.10'
compile 'org.codehaus.groovy:groovy-all:2.3.6'
}
Here is my spring context :
<int-jpa:inbound-channel-adapter
channel="jpaInboundChannel"
entity-manager="entityManagerFactory"
jpa-query="select p from Person p"
auto-startup="true" >
<int:poller fixed-rate="2000">
</int:poller>
</int-jpa:inbound-channel-adapter>
<bean id="transactionManager" class="org.springframework.orm.jpa.JpaTransactionManager">
<constructor-arg ref="entityManagerFactory" />
</bean>
<bean id="entityManagerFactory"
class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="jpaVendorAdapter" ref="vendorAdaptor" />
<property name="packagesToScan" value="com.univ"/>
</bean>
<jdbc:embedded-database id="dataSource" type="HSQL" />
<bean id="vendorAdaptor" class="org.springframework.orm.jpa.vendor.OpenJpaVendorAdapter"
parent="abstractVendorAdaptor">
</bean>
<bean id="abstractVendorAdaptor" abstract="true">
<property name="generateDdl" value="true" />
<property name="database" value="HSQL" />
<property name="showSql" value="false"/>
</bean>
<int:service-activator input-channel="jpaInboundChannel" ref="service" method="method"></int:service-activator>
<bean id="service" class="com.univ.Service" />
The Groovy main programs contains :
ApplicationContext ctx = new ClassPathXmlApplicationContext("classpath:META-INF/applicationContext.xml")
What can I do ? Thank you.