I have a number of plans pointing to a few different workspaces on my build machine. One plan (and its associated branches) seems to have stopped working for some reason. It has been stuck on "Checking out source code" for about a day now, despite the plan having worked in the past, and other plans in the system working correctly.
There haven't been any recent changes in the Perforce workspace it's listening to, and I don't see any errors in the Bamboo logs that would seem relevant.
Why is it stuck on "checking out source code"?