Hi, I'm running Zope 2.7.5-1, python 2.3.5-2 and experience that during the runnig of my own functional tests (sandboxed) after a few tests the program locks up (CTRL-C does not work, CTRL-Z yes). I can reproduce the issue with the following test: --- from Testing import ZopeTestCase ZopeTestCase.utils.setupCoreSessions(ZopeTestCase.Zope.app()) class TestSessionBug(ZopeTestCase.Functional, ZopeTestCase.ZopeTestCase): ''' This locks up in the start of test07! The checkpoint is never reached. ''' def afterSetUp(self): print 'Checkpoint' request = self.app.REQUEST sdm = self.app.session_data_manager request.set('SESSION', sdm.getSessionData()) self.sessipn = request.SESSION def test_01(self): pass def test_02(self): pass def test_03(self): pass def test_04(self): pass def test_05(self): pass def test_06(self): pass def test_07(self): pass def test_08(self): pass def test_09(self): pass def test_10(self): pass def test_11(self): pass def test_suite(): from unittest import TestSuite, makeSuite suite = TestSuite() suite.addTest(makeSuite(TestSessionBug)) return suite -- The setup of the sessions in the above code triggers the problem but it might not be its direct reason. Even without this it happens in some of my test methods. The lockup is very deterministic and it does not seem to have much to do with the test methods themselves, that is, if I just run the test method where it broke, it does not occur. What am I missing? Can someone reproduce this? -- Balazs REE