We have deployed a web2py app to a client site with the client now doing 
some testing. On an initial load into the app by the first browser and on 
stress load of concurrent users, this error is being thrown. 

<class 'gluon.contrib.pypyodbc.Error'> (u'HY090', u'[HY090] 
[Microsoft][ODBC Driver Manager] Invalid 

A refresh of the browser can get past it in most cases until at some point 
even a refresh will not work. 

Installation is using the ISAPI Option. Recycling the application pool 
clears the error and then it happens if you wait a while. Under load the 
app is very slow. 

I am thinking the error is a trojan caused when the App Pool runs out of 
memory or there is some problem in running under ISAPI. The app itself is 
using the DAL in a conventional way. HY090 is a low level error which was a 
problem reported at one point in pyodbc. It seems to be replicated mostly 
on an initial load. 

Any tips? 

-- 
Resources:
- http://web2py.com
- http://web2py.com/book (Documentation)
- http://github.com/web2py/web2py (Source code)
- https://code.google.com/p/web2py/issues/list (Report Issues)
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