We help IT Professionals succeed at work.
Get Started

Sudden Error on IIS

Last Modified: 2021-04-12
Hi EE,

Lodged one our IIS webservers today to check on an issue and I got the following error message:

Unable to connect to the database.
The error message returned was:
Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use and max pool size was reached.

Then I restarted the IIS Server

Now, this error message appears.

Runtime Error
Description: An exception occurred while processing your request. Additionally, another exception occurred while executing the custom error page for the first exception. The request has been terminated.

I rebooted the server entirely at this point but the issue still persists.

No updates have applied to the server recently. How would I go about troubleshooting this any assistance is appreciated.

Running windows server 2016 IIS v10.

Thank you.
Watch Question
Most Valuable Expert 2013
This problem has been solved!
Unlock 1 Answer and 13 Comments.
See Answer
Why Experts Exchange?

Experts Exchange always has the answer, or at the least points me in the correct direction! It is like having another employee that is extremely experienced.

Jim Murphy
Programmer at Smart IT Solutions

When asked, what has been your best career decision?

Deciding to stick with EE.

Mohamed Asif
Technical Department Head

Being involved with EE helped me to grow personally and professionally.

Carl Webster
CTP, Sr Infrastructure Consultant
Ask ANY Question

Connect with Certified Experts to gain insight and support on specific technology challenges including:

  • Troubleshooting
  • Research
  • Professional Opinions
Did You Know?

We've partnered with two important charities to provide clean water and computer science education to those who need it most. READ MORE