Mercurial > public > mercurial-scm > hg
comparison mercurial/revlogutils/nodemap.py @ 46971:a3720569a43f
nodemap: deal with data mmap error
If the file is too small, the mmapread call would raise a ValueError. We catch
that and ignore nodemap content (as we do without mmap). This make the repository
slightly slower (until the next write) but usable. Unlike the current crash.
Differential Revision: https://phab.mercurial-scm.org/D10458
| author | Pierre-Yves David <pierre-yves.david@octobus.net> |
|---|---|
| date | Fri, 16 Apr 2021 15:39:00 +0200 |
| parents | e2f7b2695ba1 |
| children | f38bf44e077f |
comparison
equal
deleted
inserted
replaced
| 46970:99aed233aa8d | 46971:a3720569a43f |
|---|---|
| 51 filename = _rawdata_filepath(revlog, docket) | 51 filename = _rawdata_filepath(revlog, docket) |
| 52 use_mmap = revlog.opener.options.get(b"persistent-nodemap.mmap") | 52 use_mmap = revlog.opener.options.get(b"persistent-nodemap.mmap") |
| 53 try: | 53 try: |
| 54 with revlog.opener(filename) as fd: | 54 with revlog.opener(filename) as fd: |
| 55 if use_mmap: | 55 if use_mmap: |
| 56 data = util.buffer(util.mmapread(fd, data_length)) | 56 try: |
| 57 data = util.buffer(util.mmapread(fd, data_length)) | |
| 58 except ValueError: | |
| 59 # raised when the read file is too small | |
| 60 data = b'' | |
| 57 else: | 61 else: |
| 58 data = fd.read(data_length) | 62 data = fd.read(data_length) |
| 59 except (IOError, OSError) as e: | 63 except (IOError, OSError) as e: |
| 60 if e.errno == errno.ENOENT: | 64 if e.errno == errno.ENOENT: |
| 61 return None | 65 return None |