I just restarted Mailman and got two tracebacks at exactly the same time, from two different processes (the PID number is logged too). Could Mailman be unqueuing from the pipeline queue in parallel processes ? Could that cause the SQLite lock ? For reference, the two tracebacks in the log : Dec 18 05:05:38 2012 (31146) Uncaught runner archive exception: database is locked Dec 18 05:05:38 2012 (31146) Traceback (most recent call last): File "/srv/dev/mailman/mailman3/mailman/src/mailman/core/runner.py", line 138, in _one_iteration self._process_one_file(msg, msgdata) File "/srv/dev/mailman/mailman3/mailman/src/mailman/core/runner.py", line 194, in _process_one_file else getUtility(IListManager).get(unicode(listname))) File "/srv/dev/mailman/mailman3/mailman/src/mailman/database/transaction.py", line 78, in wrapper return function(args[0], config.db.store, *args[1:], **kws) File "/srv/dev/mailman/mailman3/mailman/src/mailman/model/listmanager.py", line 69, in get return store.find(MailingList, MailingList._list_id == list_id).one() File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/store.py", line 1142, in one result = self._store._connection.execute(select) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 238, in execute raw_cursor = self.raw_execute(statement, params) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/databases/sqlite.py", line 154, in raw_execute return Connection.raw_execute(self, statement, params) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 322, in raw_execute self._check_disconnect(raw_cursor.execute, *args) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 371, in _check_disconnect return function(*args, **kwargs) OperationalError: database is locked Dec 18 05:05:38 2012 (31146) SHUNTING: 1355828738.0138969+0a282d3d40cc1528e1d41b992b070b492449a641 Dec 18 11:05:38 2012 (31144) Uncaught runner digest exception: database is locked Dec 18 11:05:38 2012 (31144) Traceback (most recent call last): File "/srv/dev/mailman/mailman3/mailman/src/mailman/core/runner.py", line 138, in _one_iteration self._process_one_file(msg, msgdata) File "/srv/dev/mailman/mailman3/mailman/src/mailman/core/runner.py", line 222, in _process_one_file keepqueued = self._dispose(mlist, msg, msgdata) File "/srv/dev/mailman/mailman3/mailman/src/mailman/runners/digest.py", line 373, in _dispose for address, delivery_mode in mlist.last_digest_recipients: File "/srv/dev/mailman/mailman3/mailman/src/mailman/model/mailinglist.py", line 347, in last_digest_recipients results.remove() File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/store.py", line 1183, in remove Delete(self._where, self._find_spec.default_cls_info.table)) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 238, in execute raw_cursor = self.raw_execute(statement, params) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/databases/sqlite.py", line 154, in raw_execute return Connection.raw_execute(self, statement, params) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 322, in raw_execute self._check_disconnect(raw_cursor.execute, *args) File "/srv/dev/mailman/lib/python2.6/site-packages/storm-0.19-py2.6-linux-x86_64.egg/storm/database.py", line 371, in _check_disconnect return function(*args, **kwargs) OperationalError: database is locked Dec 18 11:05:38 2012 (31144) SHUNTING: 1355828738.035006+8f81ee5185d05d54c65181474667db62072a6756 About 7 messages have been unqueued from the pipeline queue before the locking error happened. -- You received this bug notification because you are a member of Mailman Coders, which is subscribed to GNU Mailman. https://bugs.launchpad.net/bugs/1091586 Title: Frequent OperationalError: database is locked with sqlite To manage notifications about this bug go to: https://bugs.launchpad.net/mailman/+bug/1091586/+subscriptions