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HomanA's avatar
HomanA
Copper Contributor
Jun 04, 2025

Stuck on MCC container to be downloaded

Hello everyone, 

I'm new here and I'm wondering if someone could help me.

I'm trying to install MCC but it is "stuck" on Waiting for MCC container to be downloaded (could take up  to 30 minutes) but it takes a few hours before I get this error message: "An operation on a socket could not be performed because the system lacked sufficient buffer space or because a queue was full. (error code: 0x80072747)"

The VM where the WSL runs on is a Windows Server 2022, 16GB RAM, nested virtualization configured, 1 socket, 4 cores, 8 logical processors, 1TB free of space (HD). The server is only dedicated for this role.

I'm also in contact with the support team of Microsoft but we are still not able to figure this out.

Is there a way we can troubleshoot? Is the MCC that is not able to download (via NAT of the VM-host?), are there other things I can check/test?

 

Thank you in advance.

 

5 Replies

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  • Khuongy's avatar
    Khuongy
    Copper Contributor
    Aug 05, 2025

    Hi all,

    We’re experiencing the exact same issue. The process gets stuck at:

    “Waiting for MCC container to be downloaded (could take up to 30 minutes)”

    Installing on Windows Server 2022 with gMSA account.

    We’ve followed the documented steps but have no idea where to go from here. Any help or guidance would be greatly appreciated.

    Thanks!

    • HomanA's avatar
      HomanA
      Copper Contributor
      Aug 06, 2025

      At this moment we are still busy with the team of Microsoft to try to solve this issue. I can already tell you that there is a GA (new installation files), perhaps that will work for you? Microsoft thinks that it has something to do with our proxy. We also tried the installation with a local user instead of a gMSA, but still the same issue. I will  update you once I have more information.

  • HomanA's avatar
    HomanA
    Copper Contributor
    Jun 06, 2025

    Thank you for your reply, much appreciated. In the log file, I can only find "Waiting for MCC to be downloaded" for almost every 10 seconds:
    [06/06/2025 09:19:30]
     Waiting for MCC to be downloaded
    [06/06/2025 09:19:39]
     Waiting for MCC to be downloaded
    [06/06/2025 09:19:48]
     Waiting for MCC to be downloaded
    [06/06/2025 09:19:57]
     Waiting for MCC to be downloaded
    [06/06/2025 09:20:06]
     Waiting for MCC to be downloaded

    The network team didn't find any flow from this device to the internet. But I find it very strange that the IP of the WSL is not the same as for the host. This IP of the WSL is in the 192.168-range while the host is on the 10-range... I also verified the WSL settings, it should use NAT. but it isn't using it...

     

    • bindumadhava's avatar
      bindumadhava
      Brass Contributor
      Aug 06, 2025

      Based on my discussion - MS use a service on Windows called the 'Host Network Service' and when WSL request a NAT network this random IPs are assigned. 

      We have WSL with IP starting from 192.x or 172.x

  • bindumadhava's avatar
    bindumadhava
    Brass Contributor
    Jun 05, 2025

    hi

    Did you have a check on the list of endpoints that need to be whitelisted if your device is behind proxy / firewall

    https://learn.microsoft.com/en-us/windows/deployment/do/delivery-optimization-endpoints

     

    another place is to check is the installation log which can show if the download has started or there was some issue "

    1. WSL_Mcc_Install_FromRegisteredTask_Transcript: This log file records the detailed status that is written during the registered tasks install

    hope this helps. 

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