IntegrityError: (1062, "Duplicate entry 'usd2-1-timeline.daysba' for key 1")

[usd2]

How to Reproduce

While doing a GET operation on /timeline, Trac issued an internal error.

(please provide additional details here)

Request parameters:

{'changeset': u'on',
 'daysback': u'30',
 'from': u'06/08/2008',
 'update': u'Update'}

System Information

Trac	0.11rc1
Python	2.4.4 (#2, Apr 26 2007, 00:02:45) [GCC 4.1.2 20061115 (prerelease) (Debian 4.1.1-21)]
setuptools	0.6c8
MySQL	server: "5.0.51a-3-log", client: "5.0.51a", thread-safe: 1
MySQLdb	1.2.2
Genshi	0.4.4
Pygments	0.9
Subversion	1.4.4 (r25188)

Python Traceback

Traceback (most recent call last):
  File "/usr/lib/python2.4/site-packages/Trac-0.11rc1-py2.4.egg/trac/web/main.py", line 417, in _dispatch_request
    dispatcher.dispatch(req)
  File "/usr/lib/python2.4/site-packages/Trac-0.11rc1-py2.4.egg/trac/web/main.py", line 222, in dispatch
    req.session.save()
  File "/usr/lib/python2.4/site-packages/Trac-0.11rc1-py2.4.egg/trac/web/session.py", line 93, in save
    "VALUES(%s,%s,%s,%s)", attrs)
  File "/usr/lib/python2.4/site-packages/Trac-0.11rc1-py2.4.egg/trac/db/util.py", line 57, in executemany
    return self.cursor.executemany(sql_escape_percent(sql), args)
  File "/usr/lib/python2.4/site-packages/Trac-0.11rc1-py2.4.egg/trac/db/util.py", line 57, in executemany
    return self.cursor.executemany(sql_escape_percent(sql), args)
  File "/var/lib/python-support/python2.4/MySQLdb/cursors.py", line 218, in executemany
    r = self._query('\n'.join([query[:p], ',\n'.join(q), query[e:]]))
  File "/var/lib/python-support/python2.4/MySQLdb/cursors.py", line 312, in _query
    rowcount = self._do_query(q)
  File "/var/lib/python-support/python2.4/MySQLdb/cursors.py", line 276, in _do_query
    db.query(q)
IntegrityError: (1062, "Duplicate entry 'usd2-1-timeline.daysba' for key 1")

[rdworth]

This error is reproduced by not being logged in. Should not be closed fix until you can run reports and timeline without being logged in to Trac.

[joern.zaefferer]

Created a ticket on Trac's tracker:  http://trac.edgewall.org/ticket/8279

[joern.zaefferer]

They suggest to fix the MySQL bindings (to get thread-safe: 1) or switching to InnoDB tables (we are using MyISAM), ala  http://www.linux.com/feature/46370

[rdworth]

Upgraded to latest stable Trac 0.11.7. Seems to have fixed this issue, finally.