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Mod_python error: "PythonHandler trac.web.modpython_frontend"

Traceback (most recent call last):

  File "/usr/lib64/python2.4/site-packages/mod_python/apache.py", line 299, in HandlerDispatch
    result = object(req)

  File "/usr/lib/python2.4/site-packages/trac/web/modpython_frontend.py", line 87, in handler
    gateway.run(dispatch_request)

  File "/usr/lib/python2.4/site-packages/trac/web/wsgi.py", line 87, in run
    response = application(self.environ, self._start_response)

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 391, in dispatch_request
    env = _open_environment(env_path, run_once=run_once)

  File "/usr/lib/python2.4/site-packages/trac/web/main.py", line 58, in _open_environment
    env_cache[env_path] = open_environment(env_path)

  File "/usr/lib/python2.4/site-packages/trac/env.py", line 467, in open_environment
    if env.needs_upgrade():

  File "/usr/lib/python2.4/site-packages/trac/env.py", line 352, in needs_upgrade
    db = self.get_db_cnx()

  File "/usr/lib/python2.4/site-packages/trac/env.py", line 214, in get_db_cnx
    return DatabaseManager(self).get_connection()

  File "/usr/lib/python2.4/site-packages/trac/db/api.py", line 76, in get_connection
    return self._cnx_pool.get_cnx(self.timeout or None)

  File "/usr/lib/python2.4/site-packages/trac/db/pool.py", line 101, in get_cnx
    cnx = self._connector.get_connection(**self._kwargs)

  File "/usr/lib/python2.4/site-packages/trac/db/postgres_backend.py", line 40, in get_connection
    return PostgreSQLConnection(path, user, password, host, port, params)

  File "/usr/lib/python2.4/site-packages/trac/db/postgres_backend.py", line 112, in __init__
    cnx = psycopg.connect(' '.join(dsn))

OperationalError: could not connect to server: Connection refused
	Is the server running on host "bd.intercalce.com.br" and accepting
	TCP/IP connections on port 5432?


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