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Portage file corruption -- but which file?
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dwnoon
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Joined: 28 Aug 2003
Posts: 21
Location: Luton, England

PostPosted: Fri Sep 28, 2012 9:43 pm    Post subject: Portage file corruption -- but which file? Reply with quote

One of my systems has had a dodgy cable to its hard drives, which seems to have corrupted some sector(s) when Portage was writing one of its files. This manifests itself with the following error:

Code:

dwn@karnak ~ % emerge -pvuDN @world

These are the packages that would be merged, in order:

Calculating dependencies... done!
Traceback (most recent call last):
  File "/usr/bin/emerge", line 50, in <module>
    retval = emerge_main()
  File "/usr/lib/portage/pym/_emerge/main.py", line 2071, in emerge_main
    myopts, myaction, myfiles, spinner)
  File "/usr/lib/portage/pym/_emerge/actions.py", line 302, in action_build
    settings, trees, myopts, myparams, myaction, myfiles, spinner)
  File "/usr/lib/portage/pym/_emerge/depgraph.py", line 7319, in backtrack_depgraph
    myaction, myfiles, spinner)
  File "/usr/lib/portage/pym/_emerge/depgraph.py", line 7351, in _backtrack_depgraph
    success, favorites = mydepgraph.select_files(myfiles)
  File "/usr/lib/portage/pym/_emerge/depgraph.py", line 2249, in select_files
    self._load_vdb()
  File "/usr/lib/portage/pym/_emerge/depgraph.py", line 546, in _load_vdb
    fake_vartree.sync()
  File "/usr/lib/portage/pym/_emerge/FakeVartree.py", line 179, in sync
    self._sync()
  File "/usr/lib/portage/pym/_emerge/FakeVartree.py", line 228, in _sync
    pkg = self._pkg(cpv)
  File "/usr/lib/portage/pym/_emerge/FakeVartree.py", line 250, in _pkg
    self._real_vardb.aux_get(cpv, self._db_keys)),
  File "/usr/lib/portage/pym/portage/dbapi/vartree.py", line 662, in aux_get
    pkg_data = self._aux_cache["packages"].get(mycpv)
  File "/usr/lib/portage/pym/portage/dbapi/vartree.py", line 563, in _aux_cache
    self._aux_cache_init()
  File "/usr/lib/portage/pym/portage/dbapi/vartree.py", line 585, in _aux_cache_init
    aux_cache = mypickle.load()
KeyError: 1898881161


The contents of a .pickle file are clearly invalid. But the .pickle file is a transient thing, used during the emerge command but built from soemthing else. Does anybody with inner knowledge of emerge processing have any idea which file(s) could be corrupt?
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Dave [RLU #314465]
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dol-sen
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Joined: 30 Jun 2002
Posts: 2805
Location: Richmond, BC, Canada

PostPosted: Sat Sep 29, 2012 2:06 am    Post subject: Reply with quote

Code:
rm /var/cache/edb/vdb_metadata.pickle
should fix that issue.

You'll have to do that one and see what else may need fixing.
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Brian
Porthole, the Portage GUI frontend irc@freenode: #gentoo-guis, #porthole, Blog
layman, gentoolkit, CoreBuilder, esearch...
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dol-sen
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Joined: 30 Jun 2002
Posts: 2805
Location: Richmond, BC, Canada

PostPosted: Sat Sep 29, 2012 3:26 am    Post subject: Reply with quote

Also this type of error is now fixed to handle it automatically without crashing.

http://git.overlays.gentoo.org/gitweb/?p=proj/portage.git;a=commit;h=2377357f4e0164d338c1249c79f479229aa7c0e4
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Brian
Porthole, the Portage GUI frontend irc@freenode: #gentoo-guis, #porthole, Blog
layman, gentoolkit, CoreBuilder, esearch...
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dwnoon
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Joined: 28 Aug 2003
Posts: 21
Location: Luton, England

PostPosted: Sat Sep 29, 2012 3:15 pm    Post subject: Reply with quote

dol-sen wrote:
Code:
rm /var/cache/edb/vdb_metadata.pickle
should fix that issue.

You'll have to do that one and see what else may need fixing.

Yes, that fixed the immediate problem. I just hope not too many other files have been corruptted.

Many thanks.
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Dave [RLU #314465]
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