Hi,

I'm frequently coming across a problem with the transaction. A typical
traceback is included below.

Relevant section of paste.ini:

[pipeline:main]
pipeline =
    responselogger
    browserid
    deliverance
    beaker
    egg:repoze.tm2#tm
    who
    myapp

I don't call session.commit() anywhere in my code. And on refresh the
error disappears (usually the first refresh, sometimes on second or
third refresh).

Has anyone else come across this problem and if so what was the
solution or source of the problem?

Thanks in advance,
Darryl Cousins

Traceback (most recent call last):
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/Paste-1.7.2-py2.6.egg/paste/httpserver.py",
line 1062, in process_request_in_thread
    self.finish_request(request, client_address)
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/SocketServer.py",
line 320, in finish_request
    self.RequestHandlerClass(request, client_address, self)
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/SocketServer.py",
line 615, in __init__
    self.handle()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/Paste-1.7.2-py2.6.egg/paste/httpserver.py",
line 436, in handle
    BaseHTTPRequestHandler.handle(self)
  File 
"/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/BaseHTTPServer.py",
line 329, in handle
    self.handle_one_request()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/Paste-1.7.2-py2.6.egg/paste/httpserver.py",
line 431, in handle_one_request
    self.wsgi_execute()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/Paste-1.7.2-py2.6.egg/paste/httpserver.py",
line 287, in wsgi_execute
    self.wsgi_start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/repoze.debug-0.7-py2.6.egg/repoze/debug/responselogger.py",
line 59, in __call__
    app_iter = self.application(environ, replace_start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/repoze.browserid-0.2-py2.6.egg/repoze/browserid/middleware.py",
line 92, in __call__
    return self.app(environ, start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/parts/svneggs/deliverance/deliverance/security.py",
line 89, in replacement_app
    return app(environ, start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/parts/svneggs/deliverance/deliverance/middleware.py",
line 87, in __call__
    resp = req.get_response(self.app)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/WebOb-0.9.8-py2.6.egg/webob/request.py",
line 919, in get_response
    application, catch_exc_info=False)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/WebOb-0.9.8-py2.6.egg/webob/request.py",
line 887, in call_application
    app_iter = application(self.environ, start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/Beaker-1.5.1-py2.6.egg/beaker/middleware.py",
line 152, in __call__
    return self.wrap_app(environ, session_start_response)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/repoze.tm2-1.0a5-py2.6.egg/repoze/tm/__init__.py",
line 47, in __call__
    self.commit()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/repoze.tm2-1.0a5-py2.6.egg/repoze/tm/__init__.py",
line 52, in commit
    t.commit()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/transaction-1.0.0-py2.6.egg/transaction/_transaction.py",
line 322, in commit
    self._commitResources()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/transaction-1.0.0-py2.6.egg/transaction/_transaction.py",
line 419, in _commitResources
    rm.tpc_vote(self)
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/zope.sqlalchemy-0.4-py2.6.egg/zope/sqlalchemy/datamanager.py",
line 77, in tpc_vote
    self.tx.commit()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/SQLAlchemy-0.6beta1-py2.6.egg/sqlalchemy/orm/session.py",
line 366, in commit
    self._assert_is_open()
  File 
"/Users/darrylcousins/vortex/buildout/vortex/eggs/SQLAlchemy-0.6beta1-py2.6.egg/sqlalchemy/orm/session.py",
line 242, in _assert_is_open
    raise sa_exc.InvalidRequestError(error_msg)
InvalidRequestError: The transaction is closed
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