Hi Experts,<br><div class="gmail_quote"><div><br></div><div>After install the Essex release, nova-network.log often shows 'Unable to release <private ip> because vif doesn't exist'. New instance cannot be created due to this issue.</div>

<div><br></div><div>2012-05-23 09:07:43 ERROR nova.network.manager [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Unable to release 192.168.4.36 because vif doesn't exist.
</div><div><br></div><div>Any clues?</div><div>Thanks!</div><div><br></div><div><div>2012-05-23 09:07:42 DEBUG nova.rpc.amqp [-] received {u'_context_roles': [u'anotherrole', u'Member', u'admin'], u'_msg_id': u'e41350f4da46452392877e297d6287eb', u'_context_read_deleted': u'no', u'_context_request_id': u'req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d', u'args': {u'instance_id': 5, u'instance_uuid': u'c063f783-f4fd-4fcb-a2b0-38ccd0f10c50', u'host': u'Essex-233', u'project_id': u'44431b6ced994b0ca70a5bdcd5993b43', u'rxtx_factor': 1.0}, u'_context_auth_token': '<SANITIZED>', u'_context_is_admin': True, u'_context_project_id': u'44431b6ced994b0ca70a5bdcd5993b43', u'_context_timestamp': u'2012-05-23T13:07:42.589802', u'_context_user_id': u'd5783c018aaa4a27b0130e343234b59e', u'method': u'get_instance_nw_info', u'_context_remote_address': u'10.74.25.232'} from (pid=3573) _safe_log /usr/lib/python2.7/dist-packages/nova/rpc/common.py:160</div>

<div>2012-05-23 09:07:42 DEBUG nova.rpc.amqp [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] unpacked context: {'user_id': u'd5783c018aaa4a27b0130e343234b59e', 'roles': [u'anotherrole', u'Member', u'admin'], 'timestamp': '2012-05-23T13:07:42.589802', 'auth_token': '<SANITIZED>', 'remote_address': u'10.74.25.232', 'is_admin': True, 'request_id': u'req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d', 'project_id': u'44431b6ced994b0ca70a5bdcd5993b43', 'read_deleted': u'no'} from (pid=3573) _safe_log /usr/lib/python2.7/dist-packages/nova/rpc/common.py:160</div>

<div>2012-05-23 09:07:42 DEBUG nova.rpc.amqp [-] received {u'_context_roles': [u'anotherrole', u'Member', u'admin'], u'_context_request_id': u'req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d', u'_context_read_deleted': u'yes', u'args': {u'host': u'Essex-232', u'address': u'192.168.4.36'}, u'_context_auth_token': '<SANITIZED>', u'_context_is_admin': True, u'_context_project_id': u'44431b6ced994b0ca70a5bdcd5993b43', u'_context_timestamp': u'2012-05-23T13:07:42.589802', u'_context_user_id': u'd5783c018aaa4a27b0130e343234b59e', u'method': u'deallocate_fixed_ip', u'_context_remote_address': u'10.74.25.232'} from (pid=3573) _safe_log /usr/lib/python2.7/dist-packages/nova/rpc/common.py:160</div>

<div>2012-05-23 09:07:42 DEBUG nova.rpc.amqp [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] unpacked context: {'user_id': u'd5783c018aaa4a27b0130e343234b59e', 'roles': [u'anotherrole', u'Member', u'admin'], 'timestamp': '2012-05-23T13:07:42.589802', 'auth_token': '<SANITIZED>', 'remote_address': u'10.74.25.232', 'is_admin': True, 'request_id': u'req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d', 'project_id': u'44431b6ced994b0ca70a5bdcd5993b43', 'read_deleted': u'yes'} from (pid=3573) _safe_log /usr/lib/python2.7/dist-packages/nova/rpc/common.py:160</div>

<div>2012-05-23 09:07:42 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Attempting to grab semaphore "get_dhcp" for method "_get_dhcp_ip"... from (pid=3573) inner /usr/lib/python2.7/dist-packages/nova/utils.py:927</div>

<div>2012-05-23 09:07:42 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Got semaphore "get_dhcp" for method "_get_dhcp_ip"... from (pid=3573) inner /usr/lib/python2.7/dist-packages/nova/utils.py:931</div>

<div>2012-05-23 09:07:42 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Attempting to grab semaphore "dnsmasq_start" for method "restart_dhcp"... from (pid=3573) inner /usr/lib/python2.7/dist-packages/nova/utils.py:927</div>

<div>2012-05-23 09:07:42 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Got semaphore "dnsmasq_start" for method "restart_dhcp"... from (pid=3573) inner /usr/lib/python2.7/dist-packages/nova/utils.py:931</div>

<div>2012-05-23 09:07:42 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Running cmd (subprocess): cat /proc/3490/cmdline from (pid=3573) execute /usr/lib/python2.7/dist-packages/nova/utils.py:219</div>

<div>2012-05-23 09:07:43 DEBUG nova.utils [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Running cmd (subprocess): sudo nova-rootwrap kill -HUP 3490 from (pid=3573) execute /usr/lib/python2.7/dist-packages/nova/utils.py:219</div>

<div>2012-05-23 09:07:43 ERROR nova.network.manager [req-ee622237-4a08-4d43-bf18-5ae93d7f3b9d d5783c018aaa4a27b0130e343234b59e 44431b6ced994b0ca70a5bdcd5993b43] Unable to release 192.168.4.36 because vif doesn't exist.</div>

<div>2012-05-23 09:08:42 DEBUG nova.manager [-] Running periodic task FlatDHCPManager._publish_service_capabilities from (pid=3573) periodic_tasks /usr/lib/python2.7/dist-packages/nova/manager.py:152</div></div><div><br>
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