Error: "The underlying connection was closed: An unexpected error occurred on a send" in wsyncmgr.log:

SenhorDolas 1,326 Reputation points
2021-07-09T16:13:50.91+00:00

Hiya,

Every time there is a sync between SCCM SUP and WSUS the wsyncmgr.log file fills with a sea of red with this error:.

Generic exception : ImportUpdateFromCatalogSite failed. Arg = f31e2eb3-1b5a-4291-8865-e04517d44761. Error =The underlying connection was closed: An unexpected error occurred on a send.  

113416-seaofred-1.png

Sometimes it completes the sync and sometimes it does not complete and I get an alert:

Alert: Synchronization failure alert for software update point: SMS Site Server (XYZ)  
  
Alert type: Software update synchronization failure  
  
Severity: Critical  
  
Active time (UTC): 02/07/2021 19:04  
  
Condition: Generate an alert if software updates synchronization fails for the Software Update Point role at the SCCM 2012 Madrid (XYZ) site.  
  
Alert Text: Software updates synchronization for the Software Update Point role at the SCCM 2012 Madrid (XYZ) site failed.   
  
Comment:   
  

I have manually run the clean up option in WSUS many times and I also have the SUP Components > WSUS Maintenance options selected:
113431-sup-settings.png

Note that this was a W2K12 server on which we did a W2K16 in-place upgrade... just in case it's a TLS issue...

Thanks for looking into.

M

Microsoft Security | Intune | Configuration Manager | Updates
Microsoft Security | Intune | Configuration Manager | Other
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Answer accepted by question author
  1. SenhorDolas 1,326 Reputation points
    2021-07-13T12:03:26.313+00:00

    This resolved my problem first time:

    https://community.spiceworks.com/topic/2290969-frustrating-wsus-sup-config-manager-w-surface-firmware-setup-fail

    Maybe this will help further googlers.

    @Amandayou-MSFT - Thanks for your help

    1 person found this answer helpful.
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