As you can see from the log, the messages reporting received updates from the Data Adapter ("INCOMING DATA for ... ") disappear completely from 03:50:01,925; but the rest of the server activity continues regularly.
New client sessions are processed properly, as well as subscriptions and unsubscription requests; just no new data from the Data Adapter were received.

Please you should double check your Data Adapter code and your back-end source of the data to try to figure out where could be addressed the stoppage.

Regards,
Giuseppe