I use openstack cloud plugin to provision agents, several days ago I found that it cannot create new agents. After I click "provision via OpenStack Cloud Plugin " button, it shows "provisioning started" and then nothing happened. the number of agents is not at maximum.  No new instance is created on openstack host. And there are no error message from jenkins log. please check from attachment. 

the openstack host works fine and I can create new instances manually using same template that used in openstack cloud plugin.