This exception appears if a Thing that was communicating for a long time no longer appears to be communicating. A symptom could be that its
lastConnected property is not updating or that expected data updates are not showing up. Note that if a Thing name is null, token authentication always fails. For more information, refer to
Observation 2: The lastConnection property of the Thing does not update and
Observation 3: Asset was communicating earlier, but now it does not communicate.
This scenario is almost identical to
Connector Exception 8. The only difference is that the check box for the setting,
Upload Token on First Message, in the
TokenPropertyAuthenticator configuration, would need to be cleared. Once it is cleared, setting a missing (or blank) token would result in a token authentication failure.