mongodb/mongo — pull request #616 by zhihuiFan (2014-01-27 10:19:41+00:00)
Title: fixed SERVER-9923

The main change here is changing FileAllocator::_failed from bool to map.
besides that, I also changed FileAllocator::run to release lock before sleep 10 seconds in exception case. and also move the failed file name to the pending last. Please let me know there is any issue for this change. thanks!