The message hasn't fire any handler is very annoying and does not seem to serve any purpose aside from logspam. In order to prevent this message from appearing in the logs several times a second, the user would have to subscribe to every single event on the hub with an empty lambda. I'd much prefer this non-warning be demoted from loglevel warning to loglevel debug, as it may help a user debug why their application is not responding to serverside events, but has no value in a prod setting.
2022-03-30 07:50:50,984 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:50:50,984 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:50:50,984 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:50:50,984 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:50:50,984 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 07:50:50,984] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 07:57:46,736 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 07:57:46,736] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:11:19,684 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 08:11:19,684] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:15:14,440 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 08:15:14,440] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:16:01,850 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 08:16:01,850] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
2022-03-30 08:17:22,659 - SignalRCoreClient - WARNING - event 'OnSubmitDataEntry' hasn't fire any handler
[2022-03-30 08:17:22,659] WARNING in base_hub_connection: event 'OnSubmitDataEntry' hasn't fire any handler
The message
hasn't fire any handler
is very annoying and does not seem to serve any purpose aside from logspam. In order to prevent this message from appearing in the logs several times a second, the user would have to subscribe to every single event on the hub with an empty lambda. I'd much prefer this non-warning be demoted from loglevel warning to loglevel debug, as it may help a user debug why their application is not responding to serverside events, but has no value in a prod setting.