Access the Configuration Summary page by clicking Setup > Administration in Virtualization Manager.
The Configuration Summary page shows currently running data collection jobs and the success and failure of past jobs. Successful data collection jobs have a green check mark next to them. Failed data collection jobs have a red exclamation mark next to them. Hover over the red exclamation mark to see details of why a job failed.
Troubleshooting failed data collection jobs
The most common causes of an error are incorrect credentials or an unreachable Virtual Center, which is most likely due to a typo in the IP address or in the name of the Virtual Center Data Source.
Another common reason for failed collection jobs is overlapping collections. If the data collection job takes longer to complete than the interval between the collection jobs, the collection will overlap with itself, which causes it to fail.
Make sure that you allow sufficient time for the collection job to finish before the collection starts again: