Exception during message handling: 'NoneType' object is not iterable

[Attila Fazekas]

q-svc frequently tries to iterate on None Type.

The job can succeed even if this issue happens.

message: "Exception during message handling" AND message:"NoneType" AND message:"object is not iterable" AND filename:"logs/screen-q-svc.txt"

http://logstash.openstack.org/#eyJzZWFyY2giOiJtZXNzYWdlOiBcIkV4Y2VwdGlvbiBkdXJpbmcgbWVzc2FnZSBoYW5kbGluZ1wiIEFORCBtZXNzYWdlOlwiTm9uZVR5cGVcIiBBTkQgbWVzc2FnZTpcIm9iamVjdCBpcyBub3QgaXRlcmFibGVcIiBBTkQgZmlsZW5hbWU6XCJsb2dzL3NjcmVlbi1xLXN2Yy50eHRcIiIsImZpZWxkcyI6W10sIm9mZnNldCI6MCwidGltZWZyYW1lIjoiODY0MDAiLCJncmFwaG1vZGUiOiJjb3VudCIsInRpbWUiOnsidXNlcl9pbnRlcnZhbCI6MH0sInN0YW1wIjoxNDA1NTMzMDE3NzE4LCJtb2RlIjoiIiwiYW5hbHl6ZV9maWVsZCI6IiJ9

 [req-ef892503-3f93-4c68-adeb-17394b66406c ] Exception during message handling: 'NoneType' object is not iterable
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher Traceback (most recent call last):
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 134, in _dispatch_and_reply
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher incoming.message))
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 177, in _dispatch
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher return self._do_dispatch(endpoint, method, ctxt, args)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/usr/local/lib/python2.7/dist-packages/oslo/messaging/rpc/dispatcher.py", line 123, in _do_dispatch
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher result = getattr(endpoint, method)(ctxt, **new_args)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/opt/stack/new/neutron/neutron/db/l3_rpc_base.py", line 63, in sync_routers
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher self._ensure_host_set_on_ports(context, plugin, host, routers)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/opt/stack/new/neutron/neutron/db/l3_rpc_base.py", line 76, in _ensure_host_set_on_ports
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher interface)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/opt/stack/new/neutron/neutron/db/l3_rpc_base.py", line 84, in _ensure_host_set_on_port
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher {'port': {portbindings.HOST_ID: host}})
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/opt/stack/new/neutron/neutron/plugins/ml2/plugin.py", line 870, in update_port
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher need_notify=need_port_update_notify)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher File "/opt/stack/new/neutron/neutron/plugins/ml2/plugin.py", line 302, in _bind_port_if_needed
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher plugin_context, port_id, binding, bind_context)
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher TypeError: 'NoneType' object is not iterable
2014-07-16 17:28:47.782 26480 TRACE oslo.messaging.rpc.dispatcher

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/107475

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/107475
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=a84a8a5d83f545d0c00b7a83ad91b52dc31c1194
Submitter: Jenkins
Branch: master

commit a84a8a5d83f545d0c00b7a83ad91b52dc31c1194
Author: Kevin Benton <email address hidden>
Date: Sun Jul 6 00:00:23 2014 -0700

    Return a tuple of None's instead of one None

    The expected return value of _commit_port_binding is something that
    can be unpacked into two values. This changes the condition where a
    concurrent delete was detected to return a 2-tuple of None's
    instead of a bare None to prevent an iterable error.

    Closes-Bug: #1342880
    Change-Id: I9d3a51eab33819ffda6a65a00c3b5d1006a3577e