We got today the first the the message of:
There are more SCM polling activities scheduled than handled, so the threads are not keeping up with the demands

in "Manage Jenkins" overview.

We use the tfs-plugin 3.2.0, because the latest 4.0.0 doesn't support our TFS Server 2005.

Any suggestions?
I cannot provide a jenkins log, because it hold only 30 minutes, maybe cause by regulary occuring DNS errors. Maybe anybody can give me a hint how I could improve logging on my side.