We recently upgraded our infrastructure to Windows server 2008 R2 (64 bit), and are now getting intermittent 400 errors on post.
I set up failed request tracing, and have caught a couple of them.
Here are the error details:
ModuleName IsapiModule
Notification 128
HttpStatus 400
HttpReason Bad Request
HttpSubStatus 0
ErrorCode 2147943395
Notification EXECUTE_REQUEST_HANDLER
ErrorCode The I/O operation has been aborted because of either a thread exit or an application request. (0x800703e3)
Any ideas?
It looks like the answer was a bug in our Kemp load balancers. So far we've had nothing but problems with them.