Apache connection times out with New Relic active

[mattdeboard]

Our web servers have Nginx reverse proxying Apache serving our Django app. We are also running New Relic's Python agent with the required changes to our WSGI module:

import os, sys

import newrelic.agent
newrelic.agent.initialize('/path/to/project/newrelic.ini')

PROJECT_DIR = os.path.join(os.path.dirname(os.path.abspath(__file__)),"../")
PROJECT_DIR_PARENT = os.path.join(PROJECT_DIR, "../")
if PROJECT_DIR not in sys.path:
    sys.path.append(PROJECT_DIR)
if PROJECT_DIR_PARENT not in sys.path:
    sys.path.append(PROJECT_DIR_PARENT)

os.environ['CELERY_LOADER'] = 'django'
os.environ['DJANGO_SETTINGS_MODULE'] = 'projectname.settings'

import django.core.handlers.wsgi
application = django.core.handlers.wsgi.WSGIHandler()
application = newrelic.agent.wsgi_application()(application)

We've tried upgrading our current old-style Sentry installation to the Raven/Sentry paradigm, but Nginx reports a 504 (timeout) error when trying to proxy to Apache. However, if I comment out the New Relic-related lines in my WSGI module, it connects beautifully.

[mattdeboard]

I'll tentatively close this issue pending testing of a possible solution from New Relic.