So it looks like it is a known bug when returning non-indexable columns. I found it in the known issues section under the release notes for 3.1.1 (DBX-4454). The work around is to remove those columns that contain the binary data. If you run your test query while editing inputs you should see some values like "Non-Displayable Column Type image". Remove those columns and your checkpoint will update. I hope that helps. ... View more

I know this is a bit of an older thread but was wondering if you were able to find a resolution for this issue? I am currently experience the same issue with collecting trace file logs via DB Connect. I get one good pull and then nothing. After reviewing our ../splunk/var/lib/splunk/modinputs/server/splunk_app_db_connect/ file the checkpoint value is "null". TIA ... View more