Not receiving events after upgrading splunk to 8.1.10 from 7.2.3

[ggwp]

Hi, 

After upgrading Splunk Enterprise, I am no longer able to see events coming in for a certain dashboard.

How am I able to check if the forwarder that was previously sending the data is still working?

[PickleRick]

Just upgrading your Splunk installation should have no impact on data input from forwarders (7.x forwarders are compatible and supported; even 6.6 forwarders should work although it's not a supported configuration).

Check forwarder's status in Monitoring Console. Check if you have any events in _internal log coming from the forwardet host. If not, check the splunkd.log on the forwardet itself.