Under heavy load or when using jQuery's ajax abort function, we see requests build up in IIS to the point where no-one can connect and the entire site hangs, forcing a recycle.
A similar post from 3 years ago had a similar issue with .NET 4.5 and IIS 7.5 but Microsoft have stated this was fixed in 4.5.1 and released a patch for 4.5.
This problem on Windows Server 2012R2 using IIS 8 when trying to use State Server and even more so when using State Server on development machines running Windows 10 and IIS10. The patch cannot be installed on any of these machines as the installer is blocked by the presence of 4.5.1. Changing to In Proc reduces the occurrence of the issue but does not solve it completely.
This dead thread from this year on the IIS forum had a few others with the same issue but with no resolution. I have also tried setting the UploadReadAheadSize to 0 as suggested somewhere else but that did nothing to resolve the problem.
Has anyone else experienced and/or found a solution to this? Any input would be greatly appreciated.
来源：https://stackoverflow.com/questions/39389182/requestacquirestate-hanging-on-net-4-5-1-iis8