03-08-2019, 02:26 PM
IIS can and sometimes does recycle application pools. It could be that your application pool is set to recycle on a timer, based on memory usage, inactivity or other. I can't say for sure, but it sound a lot like it might be this.
You can google, but here is some basic info:
https://docs.microsoft.com/en-us/iis/con...recycling/
Also check the IIS event log for events near a time you see this happen, or events related to the app pool that your ISAPI runs in.
You can google, but here is some basic info:
https://docs.microsoft.com/en-us/iis/con...recycling/
Also check the IIS event log for events near a time you see this happen, or events related to the app pool that your ISAPI runs in.