OperationalError: database is locked

[p.walaszek@…]

How to Reproduce

While doing a POST operation on /query, Trac issued an internal error.

Randomly occuring error.

Request parameters:

{'__FORM_TOKEN': u'005111c14092be81c67003af',
 'add_filter': u'',
 'col': ['id',
         u'summary',
         u'hours',
         u'due_close',
         u'component',
         u'status',
         u'type'],
 'component': u'',
 'component_mode': u'!',
 'due_close': u'',
 'due_close_mode': u'~',
 'group': u'priority',
 'hours': u'',
 'hours_mode': u'~',
 'max': u'100',
 'order': u'due_close',
 'owner': u'fizol',
 'owner_mode': u'',
 'status': [u'assigned', u'new', u'reopened'],
 'update': u'Update'}

User Agent was: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.3) Gecko/2008092816 Iceweasel/3.0.3 (Debian-3.0.3-2)

System Information

Trac	0.11.1
Python	2.4.4 (#1, Apr 15 2008, 23:37:53) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)]
setuptools	0.6c8
SQLite	3.3.8
pysqlite	2.3.2
Genshi	0.5
mod_python	3.2.10
Pygments	0.10
Subversion	1.4.2 (r22196)
jQuery:	1.2.6

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 423, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 197, in dispatch
    resp = chosen_handler.process_request(req)
  File "/usr/lib/python2.4/site-packages/trac/ticket/query.py", line 797, in process_request
    req.redirect(query.get_href(req.href))
  File "/usr/lib/python2.4/site-packages/trac/web/api.py", line 266, in redirect
    self.session.save() # has to be done before the redirect is sent
  File "/usr/lib/python2.4/site-packages/trac/web/session.py", line 97, in save
    (self.sid,))
  File "/usr/lib/python2.4/site-packages/trac/db/util.py", line 50, in execute
    return self.cursor.execute(sql_escape_percent(sql), args)
  File "/usr/lib/python2.4/site-packages/trac/db/sqlite_backend.py", line 58, in execute
    args or [])
  File "/usr/lib/python2.4/site-packages/trac/db/sqlite_backend.py", line 50, in _rollback_on_error
    return function(self, *args, **kwargs)
OperationalError: database is locked

[Emmanuel Blot]

Please re-read the NewTicketGuidelines, especially the section about duplicates.