Rahul, if you are receiving an exception, could you please paste the exception and full stack trace. Alternatively, can you add message logging to the java callout (or check any logs you may be capturing downstream) and paste those here?For more info...

Hi @Anil Sagar @ Google @Dino-at-Google. Have either of you run into Rahul's situation before?

@Denis Kalitviansky There needs to be a semicolon at the very end of your ServicePrincipalLoginContext definition in login.conf (this semicolon is also missing from the github definition):ServicePrincipalLoginContext { com.sun.security.auth.module.Kr...

Thanks @Anil Sagar @ Google! I just tested and can confirm that this does indeed resolve the "No LoginModules configured for..." exception.