We are facing a peculiar problem related with IIS.
First let me explain the scenario.
We have hosted a ASP.Net site using .Net 4 on IIS 8 on Windows Server 2012 with SQL Server 2012 as DB.
The Website/Portal is hosted on 4 servers using a hardware load balancer.
Its a simple website asking for information from user and filling a form, upload some documents including photo/image and saved the same in DB as bytearray.
Its working properly, but sometimes, for past few days, we don't know, whether, its related with code or what, IIS App Pool is crashing automatically. We have verified the code and its working properly, but still we are unable to diagnose what/where exactly the problem is.
After restarting the IIS using iisreset or recycling the pool, resets the WebSite and then its working properly.
We have tried using debugdiag, windbg, but unable to diagnose/identify the root cause of the problem causing the crash.
The crash occurs randomly.
In local Development Server, the website is working properly, but on production machines, its causing the problem on random intervals.
Please help and suggest.