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[Bug 1696410] [NEW] (openstack) server list Unexpected API Error

To: yahoo-eng-team@xxxxxxxxxxxxxxxxxxx
From: qihuagao <1696410@xxxxxxxxxxxxxxxxxx>
Date: Wed, 07 Jun 2017 12:17:59 -0000
Reply-to: Bug 1696410 <1696410@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Public bug reported:

(openstack) server list
Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'sqlalchemy.exc.OperationalError'> (HTTP 500) (Request-ID: req-81cc918b-3ce8-42de-996f-38609e5d058f)

the following is nova-api.log:
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] Unexpected exception in API method
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions Traceback (most recent call last):
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/extensions.py", line 338, in wrapped
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/validation/__init__.py", line 181, in wrapper
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return func(*args, **kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/validation/__init__.py", line 181, in wrapper
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return func(*args, **kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 214, in detail
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     servers = self._get_servers(req, is_detail=True)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 357, in _get_servers
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sort_keys=sort_keys, sort_dirs=sort_dirs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2469, in get_all
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sort_dirs=sort_dirs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2609, in _get_instances_by_filters
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     expected_attrs=fields, sort_keys=sort_keys, sort_dirs=sort_dirs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     result = fn(cls, context, *args, **kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/objects/instance.py", line 1220, in get_by_filters
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     use_slave=use_slave, sort_keys=sort_keys, sort_dirs=sort_dirs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 235, in wrapper
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     with reader_mode.using(context):
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.gen.next()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 944, in _transaction_scope
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     allow_async=self._allow_async) as resource:
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.gen.next()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 558, in _session
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     bind=self.connection, mode=self.mode)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 317, in _create_session
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self._start()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 403, in _start
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     engine_args, maker_args)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 427, in _setup_for_connection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sql_connection=sql_connection, **engine_kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 155, in create_engine
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     test_conn = _test_connection(engine, max_retries, retry_interval)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 331, in _test_connection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return engine.connect()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2018, in connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self._connection_cls(self, **kwargs)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 72, in __init__
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     if connection is not None else engine.raw_connection()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2104, in raw_connection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self.pool.unique_connection, _connection)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2078, in _wrap_pool_connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     e, dialect, self)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1401, in _handle_dbapi_exception_noconnection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     util.raise_from_cause(newraise, exc_info)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     reraise(type(exception), exception, tb=exc_tb)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return fn()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 318, in unique_connection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return _ConnectionFairy._checkout(self)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 713, in _checkout
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     fairy = _ConnectionRecord.checkout(pool)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 480, in checkout
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     rec = pool._do_get()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 1060, in _do_get
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self._dec_overflow()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     compat.reraise(exc_type, exc_value, exc_tb)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 1057, in _do_get
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self._create_connection()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 323, in _create_connection
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return _ConnectionRecord(self)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 449, in __init__
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self.connection = self.__connect()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 607, in __connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     connection = self.__pool._invoke_creator(self)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/strategies.py", line 97, in connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return dialect.connect(*cargs, **cparams)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/default.py", line 385, in connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.dbapi.connect(*cargs, **cparams)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/psycopg2/__init__.py", line 164, in connect
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     conn = _connect(dsn, connection_factory=connection_factory, async=async)
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/eventlet/support/psycopg2_patcher.py", line 46, in eventlet_wait_callback
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     state = conn.poll()
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions OperationalError: (psycopg2.OperationalError) asynchronous connection failed
2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions 
2017-06-07 20:09:05.742 3066 INFO nova.api.openstack.wsgi [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
<class 'sqlalchemy.exc.OperationalError'>
2017-06-07 20:09:05.744 3066 INFO nova.osapi_compute.wsgi.server [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] 192.168.1.112 "GET /v2.1/servers/detail HTTP/1.1" status: 500 len: 572 time: 0.0545859

thank guys for help!

** Affects: nova
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1696410

Title:
  (openstack) server list Unexpected API Error

Status in OpenStack Compute (nova):
  New

Bug description:
  (openstack) server list
  Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'sqlalchemy.exc.OperationalError'> (HTTP 500) (Request-ID: req-81cc918b-3ce8-42de-996f-38609e5d058f)

  the following is nova-api.log:
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] Unexpected exception in API method
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions Traceback (most recent call last):
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/extensions.py", line 338, in wrapped
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return f(*args, **kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/validation/__init__.py", line 181, in wrapper
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return func(*args, **kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/validation/__init__.py", line 181, in wrapper
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return func(*args, **kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 214, in detail
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     servers = self._get_servers(req, is_detail=True)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/api/openstack/compute/servers.py", line 357, in _get_servers
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sort_keys=sort_keys, sort_dirs=sort_dirs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2469, in get_all
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sort_dirs=sort_dirs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/compute/api.py", line 2609, in _get_instances_by_filters
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     expected_attrs=fields, sort_keys=sort_keys, sort_dirs=sort_dirs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_versionedobjects/base.py", line 184, in wrapper
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     result = fn(cls, context, *args, **kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/objects/instance.py", line 1220, in get_by_filters
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     use_slave=use_slave, sort_keys=sort_keys, sort_dirs=sort_dirs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/nova/db/sqlalchemy/api.py", line 235, in wrapper
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     with reader_mode.using(context):
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.gen.next()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 944, in _transaction_scope
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     allow_async=self._allow_async) as resource:
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/contextlib.py", line 17, in __enter__
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.gen.next()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 558, in _session
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     bind=self.connection, mode=self.mode)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 317, in _create_session
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self._start()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 403, in _start
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     engine_args, maker_args)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/enginefacade.py", line 427, in _setup_for_connection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     sql_connection=sql_connection, **engine_kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 155, in create_engine
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     test_conn = _test_connection(engine, max_retries, retry_interval)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/oslo_db/sqlalchemy/engines.py", line 331, in _test_connection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return engine.connect()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2018, in connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self._connection_cls(self, **kwargs)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 72, in __init__
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     if connection is not None else engine.raw_connection()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2104, in raw_connection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self.pool.unique_connection, _connection)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2078, in _wrap_pool_connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     e, dialect, self)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 1401, in _handle_dbapi_exception_noconnection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     util.raise_from_cause(newraise, exc_info)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/compat.py", line 200, in raise_from_cause
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     reraise(type(exception), exception, tb=exc_tb)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/base.py", line 2074, in _wrap_pool_connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return fn()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 318, in unique_connection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return _ConnectionFairy._checkout(self)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 713, in _checkout
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     fairy = _ConnectionRecord.checkout(pool)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 480, in checkout
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     rec = pool._do_get()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 1060, in _do_get
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self._dec_overflow()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     compat.reraise(exc_type, exc_value, exc_tb)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 1057, in _do_get
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self._create_connection()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 323, in _create_connection
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return _ConnectionRecord(self)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 449, in __init__
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     self.connection = self.__connect()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/pool.py", line 607, in __connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     connection = self.__pool._invoke_creator(self)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/strategies.py", line 97, in connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return dialect.connect(*cargs, **cparams)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/sqlalchemy/engine/default.py", line 385, in connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     return self.dbapi.connect(*cargs, **cparams)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib64/python2.7/site-packages/psycopg2/__init__.py", line 164, in connect
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     conn = _connect(dsn, connection_factory=connection_factory, async=async)
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions   File "/usr/lib/python2.7/site-packages/eventlet/support/psycopg2_patcher.py", line 46, in eventlet_wait_callback
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions     state = conn.poll()
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions OperationalError: (psycopg2.OperationalError) asynchronous connection failed
  2017-06-07 20:09:05.739 3066 ERROR nova.api.openstack.extensions 
  2017-06-07 20:09:05.742 3066 INFO nova.api.openstack.wsgi [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] HTTP exception thrown: Unexpected API Error. Please report this at http://bugs.launchpad.net/nova/ and attach the Nova API log if possible.
  <class 'sqlalchemy.exc.OperationalError'>
  2017-06-07 20:09:05.744 3066 INFO nova.osapi_compute.wsgi.server [req-4ac89295-a118-4259-98c8-415cf5da26ba 7ae91d7b6e334c55bee81317b7aae048 78a9778adb624324a46970407072b6b7 - default default] 192.168.1.112 "GET /v2.1/servers/detail HTTP/1.1" status: 500 len: 572 time: 0.0545859

  thank guys for help!

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Follow ups

[Bug 1696410] Re: (openstack) server list Unexpected API Error
From: Launchpad Bug Tracker, 2017-08-08