I have a customer complaining that one of the sourcetype data is not appearing for couple of days in the past. I see the files for those dates are available in customer's server, but Splunk didn't pick them up for only few days. (10th - 14th) on all other days it worked. I don't find anything wrong with the Splunk config and couldn't find anything from the logs which says an issue about Splunk.
Question is, is there a REST call or any other method to find which files a Splunk forwarder processed in the past? Like if I wanted to check which files were processed by splunkforwarder yesterday; is there a way to find that?
I don't think this is what you're looking for exactly, but this should give you an idea of the files splunk is tailing.
index=_internal sourcetype=splunkd component="TailingProcessor" "adding watch"