Comment 38 for bug 1341420

The issues was reproduced at ironic-multinode job http://logs.openstack.org/75/427675/11/check/gate-tempest-dsvm-ironic-ipa-wholedisk-agent_ipmitool-tinyipa-multinode-ubuntu-xenial-nv/a66f08f/logs

several instances were scheduled to the same ironic node.

http://logs.openstack.org/75/427675/11/check/gate-tempest-dsvm-ironic-ipa-wholedisk-agent_ipmitool-tinyipa-multinode-ubuntu-xenial-nv/a66f08f/logs/screen-n-sch.txt.gz#_2017-02-03_18_46_35_112

2017-02-03 18:46:35.112 21443 DEBUG nova.scheduler.filter_scheduler [req-f8358730-fc5a-4f56-959c-af8742c8c3c2 tempest-ServersTestJSON-264305795 tempest-ServersTestJSON-264305795] Selected host: WeighedHost [host: (ubuntu-xenial-2-node-osic-cloud1-s3500-7106433, e85b2653-5563-4742-b23f-7ceb15b2032f) ram: 384MB disk: 10240MB io_ops: 0 instances: 0, weight: 2.0] _schedule /opt/stack/new/nova/nova/scheduler/filter_scheduler.py:127

http://logs.openstack.org/75/427675/11/check/gate-tempest-dsvm-ironic-ipa-wholedisk-agent_ipmitool-tinyipa-multinode-ubuntu-xenial-nv/a66f08f/logs/screen-n-sch.txt.gz#_2017-02-03_18_46_35_204

2017-02-03 18:46:35.204 21443 DEBUG nova.scheduler.filter_scheduler [req-3ff28238-f02b-4914-9ee1-dc07a15f6c9d tempest-ServerActionsTestJSON-1934209030 tempest-ServerActionsTestJSON-1934209030] Selected host: WeighedHost [host: (ubuntu-xenial-2-node-osic-cloud1-s3500-7106433, e85b2653-5563-4742-b23f-7ceb15b2032f) ram: 384MB disk: 10240MB io_ops: 0 instances: 0, weight: 2.0] _schedule /opt/stack/new/nova/nova/scheduler/filter_scheduler.py:127
2017-02-03 18:46:35.204 21443 DEBUG oslo_concurrency.lockutils [req-3ff28238-f02b-4914-9ee1-dc07a15f6c9d tempest-ServerActionsTestJSON-1934209030 tempest-ServerActionsTestJSON-1934209030] Lock "(u'ubuntu-xenial-2-node-osic-cloud1-s3500-7106433', u'e85b2653-5563-4742-b23f-7ceb15b2032f')" acquired by "nova.scheduler.host_manager._locked" :: waited 0.000s inner /usr/local/lib/python2.7/dist-packages/oslo_concurrency/lockutils.py:270