Wanted to post something here; just in case some one has some ideas. I have a case open with technical support, but we're still waiting on resolution at this point.
SQL 2012 (Hosted on Windows 2012 - Seperate System)
The On-Access scanner for MSMS 3.0 is either crashing or timing out when users are requesting content. This content can be web pages, pictures, documents, scripts, etc... The content it crashes on is inconsistant--meaning it's completely random--some time it works and sometimes it doesn't. The result to the end user depends on which files the scanner crashes on--if it's a picture, they get a "red X"; if it's a master page or *.css file, the page is completely hosed. Using a fiddler trace, the HTTP header for the requested/failed content contains a 409 Conflict Header.
When the issue is experienced, the SharePoint WFE logs an event 8330: "Failed to scan file /_catalogs/masterpage/<someTypeOfFile.xxx> due to scanner crashed."
The ULS logs at the same time log a number of events that point to a scanner crash, timeout, or both. Some examples are as follows:
There is also a unhandled exception / stack trace that references the STS2VsapiX64.dll. I'm not including it at this point since it is a lengthly trace...
My feeling on the matter is that it has something to do with a timeout setting for the on-access scanner, but I don't see any way to modify that. The only timeout setting I see is the one in SharePoint CA/Anti Virus Settings that defaults to 300 seconds. The ULS logs above are referenced time periods in milliseconds, so that setting doesn't seem to apply here.
Any help / insight that you guys may have would be greatly appreciated. If/when I get a possitive resolution I share here to make sure everyone can benefit.
Thanks in advance!
Sorry this has been so long since you've posted this, but did you ever find any answer to this issue.
We're having exactly the same issue right now.
Make sure you are running MSMS 3.5 with latest available HF\Patch - check with Support\Website\ePO software Manager on latest avialable.
Check also Sharepoint Central Admin - Security - AntiVirus - Timeout & Threads - can set up to 999 timeout - and 10 for threads. (only for MSMS 3.5)