The debugging output indicates that your namespace name is "404". That doesn't sound correct to me.
GET /wiki/api.php?format=xml&action=query&list=allpages&apnamespace=404&apfrom=Africa%3ATetianCarbonates&aplimit=500 HTTP/1.1
I've gone back and looked at the code and can find no way that the namespace would be corrupted. But maybe this is actually correct. Can you send along a screen shot of the view page for the job?
Also, the wiki connector seeds documents in batches of 500 at a time. It uses the last title fetched in order to be able to find the next batch of 500. So if there are a lot of documents, it will take a while to seed them all. In your log I see signs that this is what is happening. Have a look at all the GET requests and note the apfrom parameter.