[Bugs] #4974 Sugar UNSP: OperationalError: database is locked

[Sugar Labs Bugs]

#4974: OperationalError: database is locked
---------------------------------------------+--------------------------
       Reporter:  amanshahi                  |       Owner:
           Type:  defect                     |      Status:  new
       Priority:  Unspecified by Maintainer  |   Milestone:  Unspecified
      Component:  Sugar                      |     Version:  Unspecified
       Severity:  Unspecified                |    Keywords:
Distribution/OS:  Unspecified                |  Bug Status:  Unconfirmed
---------------------------------------------+--------------------------
 ==== How to Reproduce ====

 While doing a GET operation on `/prefs/userinterface`, Trac issued an
 internal error.

 ''(please provide additional details here)''

 Request parameters:
 {{{
 {'panel_id': u'userinterface'}
 }}}

 User agent: `Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:41.0)
 Gecko/20100101 Firefox/41.0`

 ==== System Information ====
 ''System information not available''

 ==== Enabled Plugins ====
 ''Plugin information not available''

 ==== Python Traceback ====
 {{{
 Traceback (most recent call last):
   File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 554, in
 _dispatch_request
     dispatcher.dispatch(req)
   File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 212, in
 dispatch
     self._pre_process_request(req, chosen_handler)
   File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 375, in
 _pre_process_request
     chosen_handler = filter_.pre_process_request(req, chosen_handler)
   File "/usr/local/lib/python2.7/site-packages/acct_mgr/register.py", line
 479, in pre_process_request
     if not req.session.authenticated:
   File "build/bdist.linux-x86_64/egg/trac/web/api.py", line 355, in
 __getattr__
     value = self.callbacks[name](self)
   File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 302, in
 _get_session
     return Session(self.env, req)
   File "build/bdist.linux-x86_64/egg/trac/web/session.py", line 205, in
 __init__
     if req.authname == 'anonymous':
   File "build/bdist.linux-x86_64/egg/trac/web/api.py", line 355, in
 __getattr__
     value = self.callbacks[name](self)
   File "build/bdist.linux-x86_64/egg/trac/web/main.py", line 161, in
 authenticate
     authname = authenticator.authenticate(req)
   File "/usr/local/lib/python2.7/site-packages/acct_mgr/util.py", line 82,
 in wrap
     return func(self, *args, **kwds)
   File "/usr/local/lib/python2.7/site-packages/acct_mgr/web_ui.py", line
 374, in authenticate
     return auth.LoginModule.authenticate(self, req)
   File "build/bdist.linux-x86_64/egg/trac/web/auth.py", line 91, in
 authenticate
     req.incookie['trac_auth'])
   File "/usr/local/lib/python2.7/site-packages/acct_mgr/web_ui.py", line
 448, in _get_name_for_cookie
     name = auth.LoginModule._get_name_for_cookie(self, req, cookie)
   File "build/bdist.linux-x86_64/egg/trac/web/auth.py", line 244, in
 _get_name_for_cookie
     name = self._cookie_to_name(req, cookie)
   File "build/bdist.linux-x86_64/egg/trac/web/auth.py", line 240, in
 _cookie_to_name
     for name, in self.env.db_query(sql, args):
   File "build/bdist.linux-x86_64/egg/trac/db/api.py", line 124, in execute
     return db.execute(query, params)
   File "build/bdist.linux-x86_64/egg/trac/db/util.py", line 128, in
 execute
     cursor.execute(query, params if params is not None else [])
   File "build/bdist.linux-x86_64/egg/trac/db/util.py", line 72, in execute
     return self.cursor.execute(sql_escape_percent(sql), args)
   File "build/bdist.linux-x86_64/egg/trac/db/sqlite_backend.py", line 82,
 in execute
     result = PyFormatCursor.execute(self, *args)
   File "build/bdist.linux-x86_64/egg/trac/db/sqlite_backend.py", line 60,
 in execute
     args or [])
   File "build/bdist.linux-x86_64/egg/trac/db/sqlite_backend.py", line 52,
 in _rollback_on_error
     return function(self, *args, **kwargs)
 OperationalError: database is locked
 }}}

--
Ticket URL: <https://bugs.sugarlabs.org/ticket/4974>
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