Can't Open file Text file busy

[kweigold@…]

Every once in a while our trac will lock up when accesing a changeset. The following traceback is what we are seeing. Each time a change set is accessed a diffrent revision is listed as locked. After about a half an hour it will be usable again. This issue begin after upgrading to trac .10

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 356, in dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 224, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/changeset.py", line 255, in process_request
    diff_args, diff_options)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/changeset.py", line 501, in _render_html
    diffs = _content_changes(old_node, new_node)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/changeset.py", line 452, in _content_changes
    old_content = mview.to_unicode(old_content, old_node.content_type)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 299, in <lambda>
    content_type = property(lambda x: x.get_content_type())
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/svn_fs.py", line 614, in get_content_type
    return self._get_prop(core.SVN_PROP_MIME_TYPE)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/svn_fs.py", line 622, in _get_prop
    return fs.node_prop(self.root, self._scoped_svn_path, name, self.pool())
  File "/usr/lib/python2.4/site-packages/libsvn/fs.py", line 380, in svn_fs_node_prop
    return apply(_fs.svn_fs_node_prop, args)
SubversionException: ("Can't open file '/mnt/svn/repo/db/revs/37158': Text file busy", 26)

[Christian Boos]

Is the '/mnt/svn/repo/db/revs/37158' mounted over NFS?

And what is the backend used by your repository, bdb or fsfs?

[anonymous]

Replying to cboos:

No… it's using CIFS (aka SMB).

The back end is using fsfs.

[kweigold@…]

I was looking around in the code when this was discovered. I was thinking that it had something to do with the new ability to diff branches and diffrent revisions.

[Christian Boos]

Well, in ​http://subversion.tigris.org/faq.html#nfs, there's a mention of a locking problem that happened in a working copy accessed through Samba, so this kind of things can happen.

I don't think there's anything special to do in Trac here, the code is simply trying to access a file that should have been properly locked and apparently is not, due to the deficiencies of the underlying shared filesystem.

You try to setup a mirror using svnsync.

I'm setting this as wontfix, as besides providing support for remote repositories (see #493), I don't see what we could do.