0.10.3 broken against head of trac-monotone

[ssamuel@…]

Running trac 0.10.3 against the head of trac monotone available on venge.net (is this the right place to get it?) Immediately get the following error when clicking on browse source:

Traceback (most recent call last):

File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 387, in dispatch_request

dispatcher.dispatch(req)

File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 237, in dispatch

resp = chosen_handler.process_request(req)

File "/usr/lib/python2.4/site-packages/trac/versioncontrol/web_ui/browser.py", line 100, in process_request

rev_or_latest = rev or repos.youngest_rev

File "/usr/lib/python2.4/site-packages/trac/versioncontrol/api.py", line 189, in <lambda>

youngest_rev = property(lambda x: x.get_youngest_rev())

File "/usr/lib/python2.4/site-packages/TracMonotone-0.0.2-py2.4.egg/tracvc/mtn/backend.py", line 170, in get_youngest_rev

return leaves[dates[-1]]

IndexError: list index out of range

[Thomas Moschny]

This is most likely a configuration problem. If your webserver uses multiple processes to serve your trac instance, you must use the bsddb3 caching backend. The dbmshelve backend cannot be used in multi-process environment.

[ssamuel@…]

Replying to moschny: I'm running tracd, so I don't think this applies (only one process). I tried adding the dbmshelve backend as suggested, but still got the same error.

[Thomas Moschny]

Please try the latest version from venge.net (sorry, no downloads here yet) and flush (i.e. remove) the cache before running it. Also, make sure that tracd can write to the cache dir.

Did you properly set the path to the monotone binary in your trac.conf? The path must be absolute.

And, does your database to be served contain revisions at all? I think TracMtn misbehaves in the case of an empty database.

The error message you gave indicates that the output of 'mtn -d your.db automate leaves' was empty (and this output is not cached), so maybe you should try that command by hand.

[ssamuel@…]

After upgrading to 0.32 everything looks good. Marking as invalid. Thanks for your help.