FileAuditLoginModule not working as expected

Issue

• JAAS configuration for audit-login logs, is as captured below:

    enabled=true
    file=/tmp/audit.log

    enabled=true 
    topic=org/apache/karaf/login

• The audit login logs

$ tail -f /tmp/audit.log
05/31/2017 10:15:28 - Authentication attempt - admin
05/31/2017 10:15:28 - Authentication failed - admin
05/31/2017 10:20:18 - Authentication attempt - admin
05/31/2017 10:20:18 - Authentication failed - admin

• The problem

1. Hot deploying on karaf, the *modules.xml with the above mentioned configuration (i.e. - deploy/example-module.xml), does not show successful login attemps. The audit logs generated only shows the failed attempts only.

2. If the above configuration is deployed as a bundle (deployed on karaf using osgi:install), the audit logs are not even getting generated i.e.- none, neither for successful nor for failed attempts. Although fuse logs shows the failed attempts.