On LVS hosts with RunCommand monitors configured, stopping pybal causes the following unhandled exception to be logged several times:
Feb 09 16:19:00 lvs1012 pybal[2034]: File "/usr/lib/python2.7/dist-packages/pybal/monitors/runcommand.py", line 123, in stop Feb 09 16:19:00 lvs1012 pybal[2034]: if self.checkCall and self.checkCall.active(): Feb 09 16:19:00 lvs1012 pybal[2034]: exceptions.AttributeError: 'RunCommandMonitoringProtocol' object has no attribute 'checkCall'