TracError messages are not displayed in browser

[Oleg Pudeyev <oleg@…>]

Tried this with fastcgi and tracd.

In browser I get:

Traceback (most recent call last):
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/api.py", line 440, in send_error
    data, 'text/html')
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/chrome.py", line 827, in render_template
    message = req.session.pop('chrome.%s.%d' % (type_, i))
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/api.py", line 216, in __getattr__
    value = self.callbacks[name](self)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/main.py", line 300, in _get_session
    return Session(self.env, req)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/session.py", line 198, in __init__
    self.get_session(sid)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/session.py", line 219, in get_session
    super(Session, self).get_session(sid, authenticated)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/web/session.py", line 61, in get_session
    db = self.env.get_db_cnx()
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/env.py", line 328, in get_db_cnx
    return get_read_db(self)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/db/api.py", line 90, in get_read_db
    return _transaction_local.db or DatabaseManager(env).get_connection()
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/db/api.py", line 152, in get_connection
    return self._cnx_pool.get_cnx(self.timeout or None)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/db/pool.py", line 226, in get_cnx
    return _backend.get_cnx(self._connector, self._kwargs, timeout)
  File "/usr/local/lib/python2.7/site-packages/Trac-0.12.2-py2.7.egg/trac/db/pool.py", line 146, in get_cnx
    raise TimeoutError(errmsg)
TimeoutError: Unable to get database connection within 0 seconds. (TracError(<babel.support.LazyProxy object at 0x2987e5f4>,))

In trac-admin the TracError has the actual description displayed (in my case, incorrect permissions for db/sqlite.db - see #10720).

[Jun Omae]

This issue has been fixed in Trac 0.12.3, [10552] for #9916. The following is shown in browser.

Traceback (most recent call last):
  File "/home/jun66j5/src/trac/edgewall/github/trac/web/api.py", line 446, in send_error
    data, 'text/html')
...
  File "/home/jun66j5/src/trac/edgewall/github/trac/db/pool.py", line 154, in get_cnx
    raise TimeoutError(errmsg)
TimeoutError: Unable to get database connection within 0 seconds. (TracError: The user jun66j5 requires read _and_ write permissions to the database file /home/jun66j5/var/trac/0.12-stable/db/trac.db and the directory it is located in.)

BTW, we can improve logging the original exception with traceback if log is available. 5719d9d/jomae.git. Thoughts?

[Christian Boos]

Yes, however on %r would read better than while %r operation ("Exception caught on close" for example)

[Jun Omae]

Thanks you for the comments. Applied the change in [11062].

The original issue is a duplicate of #9916.