Scenario risk is using "default" connection on a cluster

[Daniele Viganò]

This bug is very similar to https://bugs.launchpad.net/oq-engine/+bug/1167776

Running a scenario risk calculation will fail with this error:

[2013-04-11 15:30:27,264 #4 marley.openquake.org CRITICAL PoolWorker-63/5924 root] Error occurred in task: 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"?

[2013-04-11 15:30:27,265 #4 marley.openquake.org ERROR PoolWorker-63/5924 root] 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"?
Traceback (most recent call last):
  File "/usr/local/stow/openquake/oq-engine/openquake/engine/utils/tasks.py", line 183, in wrapped
    task_func(*args, **kwargs)
  File "/usr/local/stow/openquake/oq-engine/openquake/engine/utils/stats.py", line 253, in wrapper
    result = func(*args, **kwargs)
  File "/usr/local/stow/openquake/oq-engine/openquake/engine/calculators/risk/scenario/core.py", line 61, in scenario
    with EnginePerformanceMonitor('hazard_getter', job_id, scenario):
  File "/usr/local/stow/openquake/oq-engine/openquake/engine/performance.py", line 148, in __init__
    pg_pid = connection.cursor().connection.get_backend_pid()
  File "/usr/lib/python2.7/dist-packages/django/db/backends/__init__.py", line 252, in cursor
    cursor = util.CursorWrapper(self._cursor(), self)
  File "/usr/lib/python2.7/dist-packages/django/db/backends/postgresql_psycopg2/base.py", line 140, in _cursor
    self.connection = Database.connect(**conn_params)
  File "/usr/lib/python2.7/dist-packages/psycopg2/__init__.py", line 179, in connect
    connection_factory=connection_factory, async=async)
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"?

The files that are causing the issue are:
openquake/engine/tools/import_gmf_scenario.py
openquake/engine/performance.py

[Daniele Viganò (daniele-vigano)]

Fixed in pull request https://github.com/gem/oq-engine/pull/1130