Trac detected an internal error:
('Berkeley DB error for filesystem /home/svn/proj2/db while opening environment:\nPermission denied', 160029)
If you think this really should work and you can reproduce it. Then you should consider to report this problem to the Trac team.
Go to http://trac.edgewall.com/ and create a new ticket where you describe the problem, how to reproduce it. Don't forget to include the python traceback found below.
TracGuide — The Trac User and Administration Guide
Python traceback
Traceback (most recent call last):
File "/usr/lib/python2.3/site-packages/trac/web/cgi_frontend.py", line 131, in run
dispatch_request(req.path_info, req, env)
File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 139, in dispatch_request
dispatcher.dispatch(req)
File "/usr/lib/python2.3/site-packages/trac/web/main.py", line 107, in dispatch
resp = chosen_handler.process_request(req)
File "/usr/lib/python2.3/site-packages/trac/versioncontrol/web_ui/browser.py", line 89, in process_request
repos = self.env.get_repository(req.authname)
File "/usr/lib/python2.3/site-packages/trac/env.py", line 162, in get_repository
repos = SubversionRepository(repos_dir, authz, self.log)
File "/usr/lib/python2.3/site-packages/trac/versioncontrol/svn_fs.py", line 195, in __init__
self.repos = repos.svn_repos_open(self.path, self.pool())
SubversionException: ('Berkeley DB error for filesystem /home/svn/proj2/db while opening environment:\nPermission denied', 1600
See #1349.
Your best bet is to convert from BDB to FSFS.