a couple of errors left the sitemap in a running state
If the sitemap creation fails, we signal a stop event. With a new stand-alone server, the problem will have cleared itself by the time the sitemap is first requested, other error conditions may required intervention, but by signalling a stop we allow the create to be run later. this is a fix for fedwiki/wiki-client#88
When we fail to load the sitemap back into memory, probably it has been corrupted so it can't be parsed, we will recreate the sitemap.
a couple of errors left the sitemap in a running state