Details
Description
MongoDB 4.4 will refuse to start up on MongoDB 4.0 and earlier data files. When MongoDB 4.4 is run with --repair against 4.0 files, it will attempt to perform a salvage, but fail. In the case salvage fails because of a version incompatibility, no writes have been performed. In that case, the repair lock file should be removed, allowing MongoDB 4.0 to restart on those data files.