AttributeError: 'tuple' object has no attribute 'cursor'

[anonymous]

How to Reproduce

While doing a GET operation on /, Trac issued an internal error. (please provide additional details here)

== Visiting (firefox) virtualbox.org ==

Request parameters:

{}

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:14.0) Gecko/20100101 Firefox/14.0.1

System Information

System information not available

== Precise pangolin ==

Enabled Plugins

Plugin information not available

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 513, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 200, in dispatch
    chosen_handler)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 346, in _pre_process_request
    chosen_handler = filter_.pre_process_request(req, chosen_handler)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 330, in pre_process_request
    repo = self.get_repository(reponame)
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 503, in get_repository
    repoinfo = self.get_all_repositories().get(reponame, {})
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 571, in get_all_repositories
    for reponame, info in provider.get_repositories() or []:
  File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 113, in get_repositories
    cursor = db.cursor()
  File "/usr/lib/python2.4/site-packages/trac/db/util.py", line 102, in __getattr__
    return getattr(self.cnx, name)
AttributeError: 'tuple' object has no attribute 'cursor'

[Christian Boos]

… which in turn looks like a duplicate of #9640.

In particular, do you have any plugin enabled and does the problem goes away when you disable some plugins? (ticket:9640#comment:6)

Otherwise, looking at the code in tags/trac-0.12.2/trac/db/pool.py@#L77​, it's really hard to imagine how we could end up with the (op, cnx) tuple staying in the _active dict…

If the problem is reproducible and you're willing to add a few log.debug("tid=%d key=%r _active=%r cnx=%r", tid, key, self._active, cnx) statements (or similar) in the get_cnx() method linked to above, that would be highly appreciated!

[Christian Boos]

(if no update in 3 months, will be closed as duplicate)