After OS patching or unexpected/unplanned OS restart, you may notice that the oi_conenctor probe is down (red) and the functionality cannot be restored (re-validating, restarting does not help).
The following error message is present in the OI_connector logs (nothing more specific)
LOG ERROR: Max. restarts reached for probe 'oi_connector' (command = <startup java>)
UIM 20.4.x, 23.4.x
oi_connector probe
Corrupted oi_connector.cfg file
If you have a backup of oi_connector.cfg file, replace it with the corrupted file, and restart the affected robot.
Otherwise, redeploy the oi_connector probe to the affected robot and the problem should be resolved