Splunk can index any text-based log file, so it won't have any trouble ingesting the resin logs. AFAIK, there aren't any pre-built apps for resin /caucho, but you will still be able to search the logs without difficulty. If you want to "train" Splunk to recognize the resin log file formats, it is not hard (though sometimes tedious) to set up the field extractions.
Once you have Splunk monitoring the logs, open another question if you need help with reporting or field extractions. Be sure to include a brief sample of the log, too, as the resin formats seem very customizable.
BTW, this is a user-driven forum; it isn't the place to have a conversation with Support. To submit a support ticket, go to https://www.splunk.com/page/submit_issue
