This message indicates that the SSL connection is closed successfully. It is a warning message and normal to see in the logs when you enable the SSL debug flags. This is an expected behavior. If you see alerts when SSL debug is NOT ENABLED then it is a real alert and we need to take care of those issues. Also, it is not a real alert, it is a caught and handled exception from the certicom code which is not harmful and should be ignored, just because you have enabled the SSL debug flag. Once you turn it off, you won't see it in the logs.