"2015-03-17 12:38:56,605 - root - MainThread - INFO - [<callback_daemon.database.CallBack_Spool object at 0x1f94310>]"
"2015-03-17 12:38:57,025 - root - MainThread - INFO - try_originate : SIP/Voip-Innovations-out/14044905024 : 1000 : a2billing-all-callback"
"2015-03-17 12:38:57,027 - root - MainThread - INFO - CallBack Status : Error"
"2015-03-17 12:38:57,032 - root - MainThread - INFO - [2015/03/17 12:38:57] Placed 1 calls"
"2015-03-17 12:39:02,038 - root - MainThread - INFO - waiting..."
"2015-03-17 12:39:02,040 - root - MainThread - ERROR - stopping with an exception"
Traceback (most recent call last):
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/daemon.py", line 200, in start
    self.run()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/a2b_callback_daemon.py", line 117, in run
    run_action.perform()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/a2b_callback_daemon.py", line 137, in perform
    request_list = self.inst_cb_db.find_callback_request('PENDING', 11124)
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/database.py", line 180, in find_callback_request
    ((self.cc_callback_spool.c.callback_time==None) | (self.cc_callback_spool.c.callback_time < datetime.datetime.now()))
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2408, in all
    return list(self)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2525, in __iter__
    return self._execute_and_instances(context)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2538, in _execute_and_instances
    close_with_result=True)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2529, in _connection_from_session
    **kw)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 881, in connection
    execution_options=execution_options)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 886, in _connection_for_bind
    engine, execution_options)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 312, in _connection_for_bind
    self._assert_active()
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 214, in _assert_active
    % self._rollback_exception
InvalidRequestError: This Session's transaction has been rolled back due to a previous exception during flush. To begin a new transaction with this Session, first issue Session.rollback(). Original exception was: Boolean value of this clause is not defined
"2015-03-17 12:39:02,044 - root - MainThread - INFO - stopped"
Traceback (most recent call last):
  File "./a2b_callback_daemon.py", line 9, in <module>
    load_entry_point('callback-daemon==1.0.prod-r1528', 'console_scripts', 'a2b_callback_daemon')()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/a2b_callback_daemon.py", line 269, in main
    CallBackDaemon().main()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/daemon.py", line 100, in main
    self.start()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/daemon.py", line 200, in start
    self.run()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/a2b_callback_daemon.py", line 117, in run
    run_action.perform()
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/a2b_callback_daemon.py", line 137, in perform
    request_list = self.inst_cb_db.find_callback_request('PENDING', 11124)
  File "/usr/lib/python2.6/site-packages/callback_daemon-1.0.prod_r1528-py2.6.egg/callback_daemon/database.py", line 180, in find_callback_request
    ((self.cc_callback_spool.c.callback_time==None) | (self.cc_callback_spool.c.callback_time < datetime.datetime.now()))
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2408, in all
    return list(self)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2525, in __iter__
    return self._execute_and_instances(context)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2538, in _execute_and_instances
    close_with_result=True)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/query.py", line 2529, in _connection_from_session
    **kw)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 881, in connection
    execution_options=execution_options)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 886, in _connection_for_bind
    engine, execution_options)
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 312, in _connection_for_bind
    self._assert_active()
  File "/usr/lib/python2.6/site-packages/SQLAlchemy-1.0.0b1-py2.6.egg/sqlalchemy/orm/session.py", line 214, in _assert_active
    % self._rollback_exception
sqlalchemy.exc.InvalidRequestError: This Session's transaction has been rolled back due to a previous exception during flush. To begin a new transaction with this Session, first issue Session.rollback(). Original exception was: Boolean value of this clause is not defined