"Win32 exception occurred releasing IUnknown at..." error using Pylons and WMI
- by Anders
Hi all,
Im using Pylons in combination with WMI module to do some basic system monitoring of a couple of machines, for POSIX based systems everything is simple - for Windows - not so much.
Doing a request to the Pylons server to get current CPU, however it's not working well, or atleast with the WMI module. First i simply did (something) this:
c = wmi.WMI()
for cpu in c.Win32_Processor():
value = cpu.LoadPercentage
However, that gave me an error when accessing this module via Pylons (GET http://ip:port/cpu):
raise x_wmi_uninitialised_thread ("WMI returned a syntax error: you're probably running inside a thread without first calling pythoncom.CoInitialize[Ex]")
x_wmi_uninitialised_thread: <x_wmi: WMI returned a syntax error: you're probably running inside a thread without first calling pythoncom.CoInitialize[Ex] (no underlying exception)>
Looking at http://timgolden.me.uk/python/wmi/tutorial.html, i wrapped the code accordingly to the example under the topic "CoInitialize & CoUninitialize", which makes the code work, but it keeps throwing "Win32 exception occurred releasing IUnknown at..."
And then looking at http://mail.python.org/pipermail/python-win32/2007-August/006237.html and the follow up post, trying to follow that - however pythoncom._GetInterfaceCount() is always 20.
Im guessing this is someway related to Pylons spawning worker threads and crap like that, however im kinda lost here, advice would be nice.
Thanks in advance,
Anders
