I looked at the two ways to share a hibernate session between spring and seam--configure it in spring and use it in seam, or configure it in seam and use it in spring.  I chose the former, because I have other spring beans that need a spring configured data source. 

However, when I attempt to start the application, I get the following error:

java.lang.IllegalArgumentException: value of context variable is not an instance of the component bound to the context variable: serviceEntities

I've searched for other people with this error, and it seems to come up when they have a seam project that is hot deployed, and thus have old jars lying around, or they have a seam component with the same name as a jsp variable, neither of which applies here. I'm thinking that the underlying issue is that the serviceEntities bean is actually a proxied bean, wrapped in order to provide transaction management, and that somehow throws off the seam/spring integration.  Does anyone know if that indeed the case, and if so, is there a known workaround?

Here's the bean configuration:

  <bean id="serviceEntities" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <seam:component/>
    <property name="transactionManager">
      <ref bean="transactionManager"/>
    </property>
    <property name="proxyInterfaces">
      <value>com.company.IEntitiesService</value>
    </property>
    <property name="proxyTargetClass">
        <value>true</value>
    </property>
    <property name="target">
      <bean class="com.company.service.entities.HibernateEntitiesService">
        <property name="sessionFactory">
          <ref bean="sessionFactory"/>
        </property>
      </bean>
    </property>
    <property name="transactionAttributes">
      <props>
        <prop key="*">PROPAGATION_REQUIRED</prop>
      </props>
    </property>
  </bean>

and here's the components.xml

<?xml version="1.0" encoding="UTF-8"?>
<components xmlns="http://jboss.com/products/seam/components"
            xmlns:core="http://jboss.com/products/seam/core"
            xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
            xmlns:persistence="http://jboss.com/products/seam/persistence" 
            xmlns:spring="http://jboss.com/products/seam/spring"
            xmlns:transaction="http://jboss.com/products/seam/transaction"
            xsi:schemaLocation=
                "http://jboss.com/products/seam/core http://jboss.com/products/seam/core-2.0.xsd
                 http://jboss.com/products/seam/spring http://jboss.com/products/seam/spring-2.0.xsd
                 http://jboss.com/products/seam/components http://jboss.com/products/seam/components-2.0.xsd
                 http://jboss.com/products/seam/transaction http://jboss.com/products/seam/transaction-2.0.xsd
                 http://jboss.com/products/seam/persistence http://jboss.com/products/seam/persistence-2.0.xsd">
                  <core:init transaction-management-enabled="true" debug="true"/>
    <core:manager conversation-timeout="120000"
                  concurrent-request-timeout="500"
                  conversation-id-parameter="k"/>
    <spring:context-loader>
        <spring:config-locations>
        <value>/WEB-INF/spring-dbContext.xml</value>
        <value>/WEB-INF/spring-serviceContext.xml</value>
        <value>/WEB-INF/spring-cacheContext.xml</value>
        <value>/WEB-INF/spring-schedulerContext.xml</value>
        <value>/WEB-INF/spring-acegiContext.xml</value>
        </spring:config-locations>
    </spring:context-loader>
    <persistence:managed-hibernate-session name="seamManagedHibernateSession" auto-create="true" session-factory="#{sessionFactory}"/>
    <transaction:hibernate-transaction session="#{seamManagedHibernateSession}"/> 
</components>