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WSUS on Windows Server 2016 crashes periodically

August 9, 2017 by Wayne Small 2 Comments

I’ve noticed on Windows Server 2016 with WSUS Server Role installed, that the WSUS console will often go into the “Reset Server Node” screen. I feel that I’ve noticed this more frequently on WSUS 4.0 which runs on Windows Server 2016 than ever before to be honest.  I spent a little time investigating it so I could find a solution.  Here’s what I found.

I found that initially you would see that IIS was requesting a recycle of the WSUSPOOL due to it reaching it’s private bytes memory limit.

image

IIS then attempted to comply with this request, and the default timeout is set to 90 seconds.  For whatever reason however the pool did not properly recycle within that 90 seconds, so it tried again and again with the error message below being logged 3 times in total.

image

Finally after not being able to restart the WSUSPOOL, IIS simply gives up and leaves it in a stopped state and logs the error below.

image

 

Now I do not yet understand why it uses more than the defined limit for Private Memory bytes.  It could be that there’s a memory leak within WSUS, or it could simply be that the limit defined by the development team is set too low.  Below you can see within IIS Manage, under the WSUSPOOL below Application Pools, the setting is set to 1.8GB of RAM.  Given my WSUS server has 8GB RAM, I figure we can allocate more to it should it need it.

image

I’ve now changed this setting for Private Memory Limit to 6GB and restarted the application pool.  Since I’ve made this change, it seems to have settled down a lot and does not appear to crash as often.

Give it a go yourself and see if you see similar results.

image

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Filed Under: Blog Tagged With: Windows Server 2016, WSUS

About The Author

Wayne has been working with Microsoft Server products in the SMB market for over 20 years. He has a passion for technology and been a Microsoft MVP for over 15 years. Read More…

Comments

  1. Simon says

    August 20, 2017 at 9:29 pm

    A little more background:
    KB4034658 (August Update for Server 2016, and Windows 1607) corrupts the WindowsUpdate-Database which leads to recalculation of the whole database on WSUS. This process uses huge ressources as you mentioned. The same is for a new installation of Server 2016(wsus clients). The client shows(or logs) error 0x8024401c.
    After the initial checks (and if wsus didn’t crash during that time) the following checks work fine and use much less ressources.

    Reply
    • Wayne Small says

      August 21, 2017 at 9:49 am

      Thanks Simon. I’ve not heard about that issue. I know I’ve seen this issue in the past prior to the August updates myself. Appreciate the info!
      Wayne

      Reply

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