AssertionError: no lhs parent revmeta found for <bzrlib.plugins.svn.revmeta.CachingBzrMetaRevision object at 0x714aa70>

[Jean-Paul Calderone]

When pulling the same branch to two different checkouts sharing a repository, often this happens to one of them:

bzr: ERROR: Pack '70d4dafb35865ffb0b83bee3f119b06e' already exists in GCRepositoryPackCollection(CHKInventoryRepository('file:///var/lib/buildbot/bot-glyph-1/.bzr/repository/'))

[Martin Pool (mbp)]

I think this is a dupe of something else recently fixed (by John?) Can you reproduce this in 2.4b5?

[Jean-Paul Calderone (exarkun)]

Unfortunately I'm only seeing this on hardy right now. The bzr beta ppa, <https://launchpad.net/~bzr/+archive/beta>, doesn't appear to have hardy packages.

[Jean-Paul Calderone (exarkun)]

Okay, scratch that. I *did* manage to reproduce on a Natty machine. When I tried to do a checkout, it took (is taking) ages.

[Jean-Paul Calderone (exarkun)]

Eventually the checkout finished. On irc jelmer suggested that it was slow because 2.4 copies more revisions than earlier versions of bzr did.

Shortly after it finished, this happened:

bzr: failed to report crash using apport:
     OSError(17, 'File exists')
bzr: ERROR: exceptions.AssertionError: no lhs parent revmeta found for <bzrlib.plugins.svn.revmeta.CachingBzrMetaRevision object at 0x714aa70>

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 946, in exception_to_return_code
    return the_callable(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 1150, in run_bzr
    ret = run(*run_argv)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 699, in run_argv_aliases
    return self.run(**all_cmd_args)
  File "/usr/lib/python2.7/dist-packages/bzrlib/commands.py", line 721, in run
    return self._operation.run_simple(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 135, in run_simple
    self.cleanups, self.func, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/cleanup.py", line 165, in _do_with_cleanups
    result = func(*args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/builtins.py", line 1408, in run
    accelerator_tree, hardlink)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/branch.py", line 375, in create_checkout
    hardlink=hardlink)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/branch.py", line 320, in _create_heavyweight_checkout
    checkout_branch.pull(self, stop_revision=revision_id)
  File "/usr/lib/python2.7/dist-packages/bzrlib/branch.py", line 1108, in pull
    possible_transports=possible_transports, *args, **kwargs)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/branch.py", line 802, in pull
    stop_revision, overwrite)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/branch.py", line 734, in _update_revisions
    self.fetch(stop_revision=stop_revision, fetch_tags=fetch_tags)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/branch.py", line 705, in fetch
    d = resolve_tags_svn_ancestry(self.source, tag_revmetas)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/tags.py", line 94, in resolve_tags_svn_ancestry
    pb=pb):
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/repository.py", line 845, in _iter_reverse_revmeta_mapping_ancestry
    rhs_parent_foreign_revid, rhs_parent_mapping = self.lookup_bzr_revision_id(rhs_parent_revid, foreign_sibling=revmeta.metarev.get_foreign_revid())
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/repository.py", line 1064, in lookup_bzr_revision_id
    return self.revmap.get_branch_revnum(revid, layout, project)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/revids.py", line 290, in get_branch_revnum
    branch_path, min_revnum, max_revnum)
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/revids.py", line 151, in bisect_fileprop_revid_revnum
    for propname, (oldpropvalue, propvalue) in revmeta.get_changed_fileprops().iteritems():
  File "/usr/lib/python2.7/dist-packages/bzrlib/plugins/svn/revmeta.py"...

[Martin Pool (mbp)]

  status confirmed

That looks like a different bug, perhaps one originating in bzr-svn.
Do you think so, Jelmer?

Martin

[Jelmer Vernooij (jelmer)]

On Mon, 2011-08-08 at 23:37 +0000, Martin Pool wrote:
> status confirmed
>
> That looks like a different bug, perhaps one originating in bzr-svn.
> Do you think so, Jelmer?

Yeah, that's definitely a different issue. I thought I'd squashed that
particular bug though, trying to reproduce here locally at the moment.

Cheers,

jelmer

[Jelmer Vernooij (jelmer)]

FWIW, the second issue doesn't occur here locally with bzr.dev and bzr-svn trunk so it'd be interesting to find out what's different on your setup that's causing this.

[Jean-Paul Calderone (exarkun)]

You can have the repository that encountered the problem, if it would help.

[Jean-Paul Calderone (exarkun)]

The "no lhs parent revmeta found" exception just happened again on a new repository.

[Martin Pool (mbp)]

exarkun if you can put a tarball on of the relevant branches on this bug that could help.

[Martin Pool (mbp)]

or, if it's private, contact jelmer out of band.

[Jelmer Vernooij (jelmer)]

have you tried removing the bzr-svn cache?

[Jean-Paul Calderone (exarkun)]

Yes, I removed the bzr-svn cache. It didn't seem to make a difference. The repository and cache are available at <http://twistedmatrix.com/~exarkun/broken-buildbot-bzr-state.tar.bz2>. Please let me know when you have them so I don't have to keep hosting the file indefinitely.

[Jelmer Vernooij (jelmer)]

I've got the tarball, thanks.