InvalidRequestError: Can't attach instance

[Emilien Macchi]

Deploying TripleO undercloud under Pike packaging, Neutron with ML2 OVS plugin.

It fails to create network:

neutron net-create ctlplane --provider:network_type flat --provider:physical_network ctlplane
Request Failed: internal server error while processing your request.

See the trace:
http://logs.openstack.org/64/457264/1/check/gate-tripleo-ci-centos-7-scenario002-multinode-oooq/56c3c3e/logs/undercloud/var/log/neutron/server.log.txt.gz#_2017-04-17_18_56_53_265

[Emilien Macchi (emilienm)]

Note: the client is run here: http://logs.openstack.org/64/457264/1/check/gate-tripleo-ci-centos-7-scenario002-multinode-oooq/56c3c3e/logs/undercloud/home/jenkins/undercloud_install.log.txt.gz#_2017-04-17_18_56_53

[Ihar Hrachyshka (ihar-hrachyshka)]

Triggered by https://review.openstack.org/385178

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/457339

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/457399

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/457399
Committed: https://git.openstack.org/cgit/openstack/neutron/commit/?id=46bc515f82983c510dc4fb014c18e27813ce4d65
Submitter: Jenkins
Branch: master

commit 46bc515f82983c510dc4fb014c18e27813ce4d65
Author: Kevin Benton <email address hidden>
Date: Mon Apr 17 16:50:34 2017 -0700

    Don't load rels on detached objects

    OVO detaches DB objects from the session and then holds onto
    them for the life time of the OVO object. Simultaneously we attach
    a weakref to the object to the session to load relationships for it
    on commit.

    If GC hasn't eliminated this object by the time we try to load
    relationships, we end up trying to load rels for a detached object,
    which implicitly tries to add it back into the session. This fails
    if there is another copy in the session.

    This patch just skips loading detached objects because we don't need
    relationships loaded for them anyway.

    Closes-Bug: #1683469
    Change-Id: Ida3272562edb6608c6bfd7e11267159d6565a0c7

[OpenStack Infra (hudson-openstack)]

Change abandoned by Ihar Hrachyshka (<email address hidden>) on branch: master
Review: https://review.openstack.org/457339

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/neutron 11.0.0.0b2 development milestone.