If you have UDT installed it's very hard to tell if your installation is actually broken -- there is no common reporting of the status of jobs.
I've written a health-check type report for the UDT polling jobs: UDT Job Status report by polling engine and also UDT-poller.AlertDefinition
This will allow you either check the actual number of successful or failed jobs, or raise an alert if the poller is failing to gather data.
/RjL