I've recently been trying to get the Bit Rate Throttling IIS.NET module to work with my SharePoint 2010 web application. It was working briefly for me in the past, but I've tried enabling it in three different environments recently and in each case the w3wp
process for the SharePoint 2010 web application crashes as soon as I hit a page. It will serve a page or two once the w3wp starts up and then it will crash again. I've seen this problem
mentioned on the IIS.NET forums but I've not seen any possible solutions. I'm posting the issue here since this could be an issue specific to SharePoint 2010 web applications.
This is a WCM site with Output, Object and BLOB caching all enabled. Note that the problem occurs before I access any content that would be throttled by the module. These are the tests I've run:
Test 1: BLOB Cache off, Bit Rate Throttling installed but disabled
Works fine.
Test 2: BLOB Cache on, Bit Rate Throttling installed but disabled
Works fine.
Test 3: BLOB Cache on, Bit Rate Throttling installed and enabled
Faulting application name: w3wp.exe, version: 7.5.7600.16385, time stamp: 0x4a5bd0eb
Faulting module name: bitratemodule.dll, version: 7.1.625.10, time stamp: 0x4aca8535
Exception code: 0xc0000005
Fault offset: 0x0000000000007669
Faulting process id: 0x2140
Faulting application start time: 0x01cb2cd16410dafa
Faulting application path: c:\windows\system32\inetsrv\w3wp.exe
Faulting module path: C:\Program Files\IIS\Media\bitratemodule.dll
Report Id: e3004397-98c4-11df-91ae-00155d06ab22
And…
Fault bucket , type 0
Event Name: APPCRASH
Response: Not available
Cab Id: 0
Problem signature:
P1: w3wp.exe
P2: 7.5.7600.16385
P3: 4a5bd0eb
P4: bitratemodule.dll
P5: 7.1.625.10
P6: 4aca8535
P7: c0000005
P8: 0000000000007669
P9:
P10:
Attached files:
These files may be available here:
Analysis symbol:
Rechecking for solution: 0
Report Id: e3004397-98c4-11df-91ae-00155d06ab22
Report Status: 0
Test 4: BLOB Cache off, Bit Rate Throttling installed and enabled
Works fine.
Test 5: BLOB Cache on, Bit Rate Throttling installed and re-enabled
Breaks again, as in step 3.
Test 6: BLOB Cache on, Bit Rate Throttling disabled
Works fine.
As I say, I've tried this in three SharePoint 2010 environments, from single-server w/local SQL to a four server farm + SQL. Each SharePoint server is running Windows Server 2008 R2 and SQL 2008 R2. I've also tried it in two different domains/forests.
The only thing that looks remotely interesting to me is that the module is version 7.1.xxx and I'm using IIS 7.5, but the IIS.NET site suggests that it works with IIS 7.x.
At one point I believe I fixed it by enabling/disabling BLOB caching (thus steps 4-6) but I've been unable to repeat that fix. Any ideas?
