Hello guys,

As in the title I’m getting HTTP error 500 after upgrading from Ubuntu 14 to 16.

Here is the api_error.log file:

[2017-07-28 21:53:31,837][PID:1176][ERROR][redash] Exception on /login [GET]
Traceback (most recent call last):
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1988, in wsgi_app
    response = self.full_dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1641, in full_dispatch_request
    rv = self.handle_user_exception(e)
  File "/usr/local/lib/python2.7/dist-packages/flask_restful/__init__.py", line 271, in error_router
    return original_handler(e)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1544, in handle_user_exception
    reraise(exc_type, exc_value, tb)
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1639, in full_dispatch_request
    rv = self.dispatch_request()
  File "/usr/local/lib/python2.7/dist-packages/flask/app.py", line 1625, in dispatch_request
    return self.view_functions[rule.endpoint](**req.view_args)
  File "/usr/local/lib/python2.7/dist-packages/flask_limiter/extension.py", line 442, in __inner
    return obj(*a, **k)
  File "/opt/redash/redash.1.0.3.b2850/redash/handlers/authentication.py", line 97, in login
    if current_org == None and not settings.MULTI_ORG:
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 365, in <lambda>
    __eq__ = lambda x, o: x._get_current_object() == o
  File "/usr/local/lib/python2.7/dist-packages/werkzeug/local.py", line 302, in _get_current_object
    return self.__local()
  File "/opt/redash/redash.1.0.3.b2850/redash/authentication/org_resolving.py", line 21, in _get_current_org
    g.org = Organization.get_by_slug(slug)
  File "/opt/redash/redash.1.0.3.b2850/redash/models.py", line 249, in get_by_slug
    return cls.query.filter(cls.slug == slug).first()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2697, in first
    ret = list(self[0:1])
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2489, in __getitem__
    return list(res)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2797, in __iter__
    return self._execute_and_instances(context)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2818, in _execute_and_instances
    close_with_result=True)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2827, in _get_bind_args
    **kw
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/query.py", line 2809, in _connection_from_session
    conn = self.session.connection(**kw)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 966, in connection
    execution_options=execution_options)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 971, in _connection_for_bind
    engine, execution_options)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/orm/session.py", line 403, in _connection_for_bind
    conn = bind.contextual_connect()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2103, in contextual_connect
    self._wrap_pool_connect(self.pool.connect, None),
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2142, in _wrap_pool_connect
    e, dialect, self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1456, in _handle_dbapi_exception_noconnection
    exc_info
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/compat.py", line 202, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 2138, in _wrap_pool_connect
    return fn()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 387, in connect
    return _ConnectionFairy._checkout(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 766, in _checkout
    fairy = _ConnectionRecord.checkout(pool)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 516, in checkout
    rec = pool._do_get()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1138, in _do_get
    self._dec_overflow()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py", line 60, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 1135, in _do_get
    return self._create_connection()
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 333, in _create_connection
    return _ConnectionRecord(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 461, in __init__
    self.__connect(first_connect_check=True)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/pool.py", line 651, in __connect
    connection = pool._invoke_creator(self)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/strategies.py", line 105, in connect
    return dialect.connect(*cargs, **cparams)
  File "/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line 392, in connect
    return self.dbapi.connect(*cargs, **cparams)
  File "/usr/local/lib/python2.7/dist-packages/psycopg2/__init__.py", line 164, in connect
    conn = _connect(dsn, connection_factory=connection_factory, async=async)
OperationalError: (psycopg2.OperationalError) could not connect to server: No such file or directory
	Is the server running locally and accepting
	connections on Unix domain socket "/var/run/postgresql/.s.PGSQL.5432"?

[2017-07-28 21:53:31,842][PID:1176][INFO][metrics] method=GET path=/login endpoint=redash.login status=500 content_type=? content_length=-1 duration=10.77 query_count=0 query_duration=0.00

Any thoughts on what could be happening?

Nevermind… Postgres was not running but I don’t know why.