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Resolution: Workaround to Error: 2912 No more thread can be create in the system (0x800700A4) in SCVMM

I posting a Workaround for a issue I found and notice that other people running into. So far I not seen or found a root cause or a fix. But this work around is the best I have discovered and better than rebooting the Hyper V host to resolve the issue.

Link to the Article on Tech Net:
URL: https://social.technet.microsoft.com/forums/en-US/virtualmachinemanager/thread/ac48fd59-3de9-4191-8466-25bedee3f5b1

Workaround:
Though I have not found the root cause, but I did find something of a workaround that quickly brings the Hyper V host back to a functional state.

When I see the error of :

Error (2912)
An internal error has occurred trying to contact an agent on the servername.___domain.com server.
(No more threads can be created in the system (0x800700A4))
Recommended Action
Ensure the agent is installed and running. Ensure the WS-Management service is installed and running, then restart the agent.

I go to Services and Restart the "Windows Management Instrumentation" Service. Restarting this services also restarts the following services: (if they are on your server)

  • Hyper V Virtual Machine Management
  • Virtual Machine Manager Agent
  • Hyper-V Image Management Service
  • Hyper-V Networking Management Service
  • IP Helper
  • EMC PowerPath Service 5.1.2
  • SMS Agent Host

Due to the type of services that are also restarted when doing this, and if the Hyper V host is in production. I would suggest doing this with caution and sending a user awareness notification for the temporary outage. Though the outage is small depending on how long it takes for certain services to start.

Because the Hyper-V Image Management Service is restarted. Users will not be able remote control a virtual machine or may be kicked off the VM remote control session. And if you are doing this while TS into the Hyper V host server, you may lose TS connectivity momentarily.

 

 

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