The fact the instance went into error state on unshelve is not likely related to the tenant doing the unshelve, but rather the instance probably failed to spawn on the compute node during unshelve. Check your nova-conductor, nova-scheduler and/or nova-compute logs for errors.
The fact the instance went into error state on unshelve is not likely related to the tenant doing the unshelve, but rather the instance probably failed to spawn on the compute node during unshelve. Check your nova-conductor, nova-scheduler and/or nova-compute logs for errors.