UserModule.findUserByUserName problem

[glarenzie]

I am doing the following in a portlet:
UserModule um = (UserModule)new InitialContext().lookup("java:portal/UserModule");
System.out.println("UM: " + um);
User u = um.findUserByUserName("fred");

and I get this output and error:

UM: org.jboss.portal.identity.db.HibernateUserModuleImpl@965003
2007-06-12 10:34:34,137 ERROR [org.jboss.portal.identity.db.HibernateUserModuleImpl] Cannot find user by name fred
org.hibernate.HibernateException: Unable to locate current JTA transaction

What is this error trying to tell me?

[glarenzie]

If anyone else needs to know I found the answer in the 2.4 wiki as follows:
do this to the jboss-portlet.xml
<portlet-app>
...

<portlet-name>MyPortlet</portlet-name>

<trans-attribute>Required</trans-attribute>


...

<service-name>UserModule</service-name>
<service-class>org.jboss.portal.core.modules.UserModule</service-class>
<service-ref>:service=Module,type=User</service-ref>

...
</portlet-app>
Also in that example we ask the portal to propagate the portal transaction to our portlet in order to be able to modify data in the scope of the same request.