phsm commented on issue #8055:
URL: https://github.com/apache/cloudstack/issues/8055#issuecomment-1768270907

   We have tried to reporoduce the bug multiple times under different 
circumstances.
   Unfortunately, there's no reliable reproduce scenario so far. Here are our 
findings:
   - On big Cloudstack platform that had been running for 10 years: we can 
reproduce the issue. It takes 20+ minutes for each routervm instance to even 
appear on the selected hypervisor.
   If a VPC has many tiers, the amount of time for the routervm to appear 
becomes too much. In this case a hypervisor fencing mechanism reports to the 
management server that the VM is missing, and it is turned into "Stopped" state.
   - On a small but old Cloudstack platform: we can also reproduce the issue: 
it takes 20+ minutes for each routervm to start.
   - On smaller platforms, or freshly installed platforms: the issue doesn't 
exist.
   
   We continue our investigation. 


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