The root cause of the problem is the background method update_available_resources. This one takes a global lock and during that time all instances being booted are waiting on the lock to be released.
Patch for review - https://review.opendev.org/682242
The root cause of the problem is the background method update_ available_ resources. This one takes a global lock and during that time all instances being booted are waiting on the lock to be released. /review. opendev. org/682242
Patch for review - https:/