WSUS: Error: Connection Error

Question

I am running WSUS services on Windows 2008 R2 Standard. Since 3-4 weeks I am getting below error and memory utilization is high too. Can you please help me to solve this, Let me know if I need to share more information on this.

Answer 1

Similar has been reported to be caused by the Windows 10 1607 updates, so it's possible that the 1709 Fall Creators Update might cause this too. Here's short version of the similarities & solution:

The symptoms include

• High memory in the w3wp.exe process hosting the WsusPool – customers have reported memory usage approach 24GB

Cause

These updates have large metadata payloads for the dependent (child) packages because they roll up a large number of binaries. Windows 10, versions 1507 (Windows 10 RTM) and 1511 updates can also cause this, though to a lesser extent. Windows 10, version 1703 is still recent enough that the metadata is not that large yet (but will continue to grow).

Solution

A WSUS update is now available that includes improvements for update metadata processing. This update should be applied to all WSUS servers in your environment.

• Windows Server 2016 (KB4039396).
• Windows Server 2012 R2 (KB4039871)
• Windows Server 2012 (KB4039873)
• WSUS 3.0 SP2 (KB4039929)

On your Windows Server 2008 R2 you should already have WSUS 3.0 SP2 installed; check whether KB4039929 is already installed and install if needed. If this didn't help you could...

Increase the ASP.NET timeout. This shortened version omits making the backups:

1. \Program Files\Update Services\WebServices\ClientWebService\Web.Config

2. Modify httpRunTime by adding an executionTimeout attribute:

   <httpRuntime maxRequestLength="4096" executionTimeout="3600" />
   

3. From an elevated command prompt, run IISReset to restart IIS.