<div dir="ltr"><div class="gmail_default" style="font-size:small">Hi all,</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">Recently, I am getting this error message below suddenly.</div><div class="gmail_default" style="font-size:small"><br></div><div class="gmail_default" style="font-size:small">=====================================================================================================</div><div class="gmail_default" style=""><div class="gmail_default" style="">==> /var/log/nova/nova-compute.log <==</div><div class="gmail_default" style="">2016-06-30 09:49:04.051 23236 ERROR nova.compute.resource_tracker [req-0094be09-63e8-4674-b7dd-f12ee9aa6e21 - - - - -] Migration for instance 1ac7a8ef-f14f-40cc-a06d-f028ce9beaef refers to another host's instance!</div><div class="gmail_default" style="">Traceback (most recent call last):</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/conductor/manager.py", line 85, in _object_dispatch</div><div class="gmail_default" style="">    return getattr(target, method)(*args, **kwargs)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/oslo_versionedobjects/base.py", line 181, in wrapper</div><div class="gmail_default" style="">    result = fn(cls, context, *args, **kwargs)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 399, in get_by_uuid</div><div class="gmail_default" style="">    use_slave=use_slave)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 285, in wrapper</div><div class="gmail_default" style="">    return f(*args, **kwargs)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/objects/instance.py", line 391, in _db_instance_get_by_uuid</div><div class="gmail_default" style="">    columns_to_join=columns_to_join)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/api.py", line 696, in instance_get_by_uuid</div><div class="gmail_default" style="">    return IMPL.instance_get_by_uuid(context, uuid, columns_to_join)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 229, in wrapper</div><div class="gmail_default" style="">    return f(*args, **kwargs)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 330, in wrapped</div><div class="gmail_default" style="">    return f(context, *args, **kwargs)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 1964, in instance_get_by_uuid</div><div class="gmail_default" style="">    columns_to_join=columns_to_join)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">  File "/usr/lib/python2.7/dist-packages/nova/db/sqlalchemy/api.py", line 1973, in _instance_get_by_uuid</div><div class="gmail_default" style="">    raise exception.InstanceNotFound(instance_id=uuid)</div><div class="gmail_default" style=""><br></div><div class="gmail_default" style="">InstanceNotFound: Instance 1ac7a8ef-f14f-40cc-a06d-f028ce9beaef could not be found.</div><div class="gmail_default" style=""> _update_usage_from_migrations /usr/lib/python2.7/dist-packages/nova/compute/resource_tracker.py:840</div><div style="font-size:small"><br></div><div style="font-size:small">=====================================================================================================<br></div><div style="font-size:small"><br></div><div style="font-size:small">It says that that instance could not be found and as it says, that instance had been deleted when I checked it on the database as follow.</div><div style=""><div style="font-size:small"><br></div><div style="font-size:small">MariaDB [nova]> select deleted_at,uuid from instances where uuid = '1ac7a8ef-f14f-40cc-a06d-f028ce9beaef';                                                                    </div><div style="font-size:small">+---------------------+--------------------------------------+</div><div style="font-size:small">| deleted_at          | uuid                                 |</div><div style="font-size:small">+---------------------+--------------------------------------+</div><div style="font-size:small">| 2016-06-28 01:38:18 | 1ac7a8ef-f14f-40cc-a06d-f028ce9beaef |</div><div style="font-size:small">+---------------------+--------------------------------------+</div><div style="font-size:small">1 row in set (0.01 sec)</div><div style="font-size:small"><br></div><div style="font-size:small">Could somebody explain me why it happens and how to fix it?</div><div style="font-size:small"><br></div><div style="font-size:small">This is what I am working on.</div><div style="font-size:small"><br></div><div style=""><div style="">dpkg -l | grep nova-compute</div><div style="">ii  nova-compute                         2:13.0.0-0ubuntu2                   all          OpenStack Compute - compute node base</div><div style="">ii  nova-compute-kvm                     2:13.0.0-0ubuntu2                   all          OpenStack Compute - compute node (KVM)</div><div style="">ii  nova-compute-libvirt                 2:13.0.0-0ubuntu2                   all          OpenStack Compute - compute node libvirt support</div></div><div style="font-size:small"><br></div><div style="font-size:small"><div>dpkg -l | grep nova</div><div>ii  nova-api                         2:13.0.0-0ubuntu2                     all          OpenStack Compute - API frontend</div><div>ii  nova-common                      2:13.0.0-0ubuntu2                     all          OpenStack Compute - common files</div><div>ii  nova-conductor                   2:13.0.0-0ubuntu2                     all          OpenStack Compute - conductor service</div><div>ii  nova-consoleauth                 2:13.0.0-0ubuntu2                     all          OpenStack Compute - Console Authenticator</div><div>ii  nova-novncproxy                  2:13.0.0-0ubuntu2                     all          OpenStack Compute - NoVNC proxy</div><div>ii  nova-scheduler                   2:13.0.0-0ubuntu2                     all          OpenStack Compute - virtual machine scheduler</div><div>ii  python-nova                      2:13.0.0-0ubuntu2                     all          OpenStack Compute Python libraries</div><div><br></div><div><br></div><div>Dongwon</div></div></div></div></div>