request.getUserPrincipal() got null

User successfully authenticated but after authentication when I go to next controller I got request.getUserPrincipal() null. I am using websphere 7 and my application is in spring mvc.

   System.out.println("subject.getPrincipals(): " + subject.getPrincipals());

   WSSubject.setRunAsSubject(subject);

After authentication in login controller subject.getPrincipals() returns principal but when I go to next controller I got request.getUserPrincipal() null.

web.xml

<security-role>
    <开发者_运维知识库role-name>Administrator</role-name>
</security-role>

<security-constraint>
    <display-name>manager_Service</display-name>
    <web-resource-collection>
        <web-resource-name>manageservice</web-resource-name>
        <url-pattern>/manageServiceList.htm</url-pattern>
    </web-resource-collection>
    <auth-constraint>
        <role-name>Administrator</role-name>
    </auth-constraint>
    <user-data-constraint>
        <transport-guarantee>CONFIDENTIAL</transport-guarantee>
    </user-data-constraint>
</security-constraint>

application.xml

<security-role>
    <role-name>Administrator</role-name>
</security-role>

ibm-application-bnd.xml

<security-role name="Administrator">
    <group name="Administrator" />
</security-role>

User belongs to Administrator group. All my deployment descriptors are set up well. Any idea where I am getting mistake?

It seams that you are guarding only one url /manageServiceList.htm so if the user access an other url then there should be no principal at all.

Creating and configuring custom JAAS login module solves problem. See Listing 4 here

Don't know what was the problem with my previous code.