We generate quite a lot of reports for our customers at the beginning of the month and it is annoying when one customer site is not reachable at this moment. All reports contain this warning at the top of the report.
The quick and obvious workaround would be to disable the failing site in “Distributed monitoring”.
Long term solution should be to fix the site connection, but I get, that that is not always trivial.
But the warning is nevertheless relevant, as report data might be incomplete, which could cause wrong conclusions.
I can see a feature request, but I would ask you write up the specific use-case and put it into an idea.
maybe a solution would be a new setting to assign reports to specific sites in cme edition.
So when a site fails only reports which use hosts from these sites as datasource will receive the warning.