Check ltpa token between webseal and websphere 9.0

问题

Good day! Do you explain for me? I have two servers - webseal and websphere 9.0. On websphere I exported ltpa key and enable security application check. On webseal I imported ltpa key. My code:

        try {
            Subject cs = WSSubject.getCallerSubject();
            logger.info("subject: ", cs);
            logger.info("subjectPrincipal: ", WSSubject.getCallerPrincipal());
            Subject rs = WSSubject.getRunAsSubject();
            logger.info("runSubject: ", rs);
            Set securityCredentials = rs.getPublicCredentials(WSCredential.class);
            WSCredential sc = (WSCredential) securityCredentials.iterator().next();
            logger.info("securityCredential.getSecurityName(): ", sc.getSecurityName());
            return cs != null;
        } catch (Exception e) {
            logger.error("Exception: ", e);
            throw new SecurityException("Can't authorize subject");
        }

In my log:

SecurityService     : subject: 
SecurityService     : subjectPrincipal: 
SecurityService     : runSubject: 
SecurityService     : securityCredential.getSecurityName(): 

What's happened? Why my callerSubject != null, but in my log no more about secure details? Is it correct check of ltpa token?

来源：https://stackoverflow.com/questions/58960099/check-ltpa-token-between-webseal-and-websphere-9-0