Even so, please do look at the CF10 metrics.log, and specifically at the number of requests running (and completed) around the time of these failures, to see if perhaps the problem may be that CF requests are hanging up.
I appreciate that the problems seem to point to IIS/the app pool and specifically the connector, and I do realize that that’s new for CF10.
But I would still (if I were you) want to make sure that there’s no evidence of requests hanging up. It could be that the connector/app pool issue is more the symptom rather than the cause. If you found there to be no interesting evidence in the metrics log, to indicate any issue with the state of CF request processing, then I would understand you then feeling it must be the connector.
That said, it could be that yours is one of the edge cases where some tomcat connector tweaking may be warranted, as discussed in the blog entry pointed to earlier in the thread:
http://blogs.coldfusion.com/post.cfm/tuning-coldfusion-10-iis-connecto r-configuration
But I would understand if you may look at that and wonder what really to do with the info offered. I don’t feel it’s as clear as it could be, but let us know as you learn/try more.
/charlie