Splunk support came back and stated this is a known issue, and the 9.4.0 update has an issue with the Splunk DB Connect app. The work around was time consuming, but finally everything is back up and running. I had to manually go into: /opt/splunk/etc/apps/splunk_app_db_connect/local/db_inputs.conf ...and comment out each line with: tail_rising_column_init_ckpt_value checkpoint_key Then restart Splunk, then go into each INPUT config and manually reset the checkpoint value to what was recorded in the tail_rising_column_init_ckpt_value setting. Took forever, but after doing all that and another Splunk restart, only then did all the issues go away. Also noted that the 9.4.0 update removes the legacy tail_rising_column_init_ckpt_value from the db_inputs.conf file, as it is now stored in kvstore, and since kvstore has been updated with 9.4.0 update, that was the overall issue. Just yet another mess that Splunk updates have caused, but at least support is aware, and they are working hard to properly fix it.
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