initial repro info

README.md

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+```
+$ python --version
+Python 2.7.12
+```
+
+# Setup/run
+```bash
+git clone https://gist.github.com/ab633fb149d7b02e3916c370d57becd2.git ./django-repo
+cd ./django-repo
+# mkvirtualenv django-repo
+pip install django==1.9.4 https://github.com/DataDog/dd-trace-py/archive/v0.5.2.tar.gz
+python manage.py runserver
+```
+
+Open http://localhost:8000/
+
+Will receive the following error:
+
+```
+error sending spans
+Traceback (most recent call last):
+  File "/Users/brettlangdon/.env/django-test/lib/python2.7/site-packages/ddtrace/writer.py", line 127, in _target
+    self.api.send_services(services)
+  File "/Users/brettlangdon/.env/django-test/lib/python2.7/site-packages/ddtrace/api.py", line 65, in send_services
+    response = self._put(self._services, data)
+  File "/Users/brettlangdon/.env/django-test/lib/python2.7/site-packages/ddtrace/api.py", line 78, in _put
+    conn.request("PUT", endpoint, data, self._headers)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1057, in request
+    self._send_request(method, url, body, headers)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1097, in _send_request
+    self.endheaders(body)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 1053, in endheaders
+    self._send_output(message_body)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 897, in _send_output
+    self.send(msg)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 859, in send
+    self.connect()
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py", line 836, in connect
+    self.timeout, self.source_address)
+  File "/usr/local/Cellar/python/2.7.12_2/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py", line 557, in create_connection
+    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
+error: getaddrinfo() argument 2 must be integer or string
+```
+
+Reproducing via Python repl:
+
+```
+$ python
+Python 2.7.12 (default, Oct 11 2016, 15:46:18)
+[GCC 4.2.1 Compatible Apple LLVM 8.0.0 (clang-800.0.38)] on darwin
+Type "help", "copyright", "credits" or "license" for more information.
+>>> from socket import *
+>>> getaddrinfo('127.0.0.1', u'7777', 0, SOCK_STREAM)
+Traceback (most recent call last):
+  File "<stdin>", line 1, in <module>
+socket.error: getaddrinfo() argument 2 must be integer or string
+>>> getaddrinfo('127.0.0.1', '7777', 0, SOCK_STREAM)
+[(2, 1, 6, '', ('127.0.0.1', 7777))]
+>>> getaddrinfo('127.0.0.1', 7777, 0, SOCK_STREAM)
+[(2, 1, 6, '', ('127.0.0.1', 7777))]
+>>>
+```
+
+`getaddrinfo` only allows `str` or `int` for the port number and errors on `unicode`. This is not an issue for Python 3.
+
+Fixing the problem:
+
+```python
+DATADOG_TRACE = {
+    'AGENT_PORT': 7777,
+}
+```

manage.py

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+#!/usr/bin/env python
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
+
+    from django.core.management import execute_from_command_line
+
+    execute_from_command_line(sys.argv)

mysite/__init__.py

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+import logging
+import sys
+
+from ddtrace.writer import log
+
+handler = logging.StreamHandler(sys.stdout)
+log.addHandler(handler)
+log.setLevel(logging.DEBUG)

mysite/settings.py

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+"""
+Django settings for mysite project.
+
+Generated by 'django-admin startproject' using Django 1.9.4.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.9/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/1.9/ref/settings/
+"""
+
+import os
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/1.9/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'jb=3)yo#5kx_w&4i0c3qz6ns02e092f3wnla^*--9h94y4iii+'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'ddtrace.contrib.django',
+]
+
+MIDDLEWARE_CLASSES = [
+    'ddtrace.contrib.django.TraceMiddleware',
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'mysite.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [],
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'mysite.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/1.9/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/1.9/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/1.9/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/1.9/howto/static-files/
+
+STATIC_URL = '/static/'
+
+DATADOG_TRACE = {
+    'DEFAULT_SERVICE': 'my-django-app',
+    'ENABLED': True,
+}

mysite/urls.py

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+"""mysite URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/1.9/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.conf.urls import url, include
+    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
+"""
+from django.conf.urls import url
+from django.contrib import admin
+
+urlpatterns = [
+    url(r'^admin/', admin.site.urls),
+]

mysite/wsgi.py

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+"""
+WSGI config for mysite project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.9/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "mysite.settings")
+
+application = get_wsgi_application()