Internal Server Error for url: http://10.20.0.2:8000/api/v1/clusters/

Is there any progress in this issue?
Is there some sort of a temporary solution?

@Sergey, can you, please specify ISO, because I can't reproduce this on one of the latest (4910) community builds

[root@fuel ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 4910
cat /etc/fuel_build_number:
 4910
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0

[root@fuel ~]# fuel env
id | status | name | release_id
---+--------+--------+-----------
1 | new | iCloud | 2

[root@fuel ~]# fuel2 env list
+----+--------+--------+------------+
| id | status | name | release_id |
+----+--------+--------+------------+
| 1 | new | iCloud | 2 |
+----+--------+--------+------------+
[root@fuel ~]#

@Vitalii, Just the image of the official website of Mirantis.

[root@fuel ~]# shotgun2 short-report
cat /etc/fuel_build_id:
 495
cat /etc/fuel_build_number:
 495
cat /etc/fuel_release:
 9.0
cat /etc/fuel_openstack_version:
 mitaka-9.0
rpm -qa | egrep 'fuel|astute|network-checker|nailgun|packetary|shotgun':
 fuel-openstack-metadata-9.0.0-1.mos8861.noarch
 rubygem-astute-9.0.0-1.mos774.noarch
 fuel-utils-9.0.0-1.mos8607.noarch
 network-checker-9.0.0-1.mos77.x86_64
 fuel-misc-9.0.0-1.mos8607.noarch
 fuel-setup-9.0.0-1.mos6357.noarch
 shotgun-9.0.0-1.mos90.noarch
 fuel-nailgun-extension-cluster-upgrade-9.1-1.mos81.noarch
 fuelmenu-9.0.0-1.mos275.noarch
 fuel-library9.0-9.0.0-1.mos8606.noarch
 fuel-bootstrap-cli-9.0.0-1.mos291.noarch
 nailgun-mcagents-9.0.0-1.mos774.noarch
 fuel-octane-9.0.0-1.mos1349.noarch
 fuel-release-9.0.0-1.mos6357.noarch
 python-packetary-9.0.0-1.mos154.noarch
 fuel-provisioning-scripts-9.0.0-1.mos8861.noarch
 fuel-agent-9.0.0-1.mos291.noarch
 fuel-ostf-9.0.0-1.mos946.noarch
 fuel-notify-9.0.0-1.mos8607.noarch
 fuel-migrate-9.0.0-1.mos8607.noarch
 python-fuelclient-9.0.0-1.mos356.noarch
 fuel-mirror-9.0.0-1.mos154.noarch
 fuel-9.0.0-1.mos6357.noarch
 fuel-ui-9.0.0-1.mos2814.noarch
 fuel-nailgun-9.0.0-1.mos8861.noarch
[root@fuel ~]#

More info:

==> /var/log/nailgun/app.log <==
2016-12-02 03:28:47.470 ERROR [7fef8f107880] (base) Unexpected exception occured
Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/nailgun/api/v1/handlers/base.py", line 297, in handle_errors
    return func(cls, *args, **kwargs)
  File "<string>", line 2, in GET
  File "/usr/lib/python2.7/site-packages/nailgun/api/v1/handlers/base.py", line 355, in validate
    return func(cls, *args, **kwargs)
  File "<string>", line 2, in GET
  File "/usr/lib/python2.7/site-packages/nailgun/api/v1/handlers/base.py", line 381, in serialize
    resp = func(cls, *args, **kwargs)
  File "/usr/lib/python2.7/site-packages/nailgun/api/v1/handlers/node.py", line 102, in GET
    return self.collection.to_list(nodes)
  File "/usr/lib/python2.7/site-packages/nailgun/objects/base.py", line 424, in to_list
    use_iterable
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/loading.py", line 86, in instances
    util.raise_from_cause(err)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/loading.py", line 71, in instances
    rows = [proc(row) for row in fetch]
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/loading.py", line 428, in _instance
    loaded_instance, populate_existing, populators)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/loading.py", line 497, in _populate_full
    populator(state, dict_, row)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/strategies.py", line 1048, in load_collection_from_subq
    ()
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/strategies.py", line 985, in get
    self._load()
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/strategies.py", line 993, in _load
    lambda x: x[1:]
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/query.py", line 2736, in __iter__
    return self._execute_and_instances(context)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/orm/query.py", line 2751, in _execute_and_instances
    result = conn.execute(querycontext.statement, self._params)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 914, in execute
    return meth(self, multiparams, params)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/sql/elements.py", line 323, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1010, in _execute_clauseelement
    compiled_sql, distilled_params
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1146, in _execute_context
    context)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1341, in _handle_dbapi_exception
    exc_info
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1139, in _execute_context
    co...

Problem was solved by run `nailgun_syncdb`