Django and LogDNA, server seems to be getting stuck

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Hey LogDNA,

It could be my configuration but when trying to use LogDNA and Django, the server seems to get stuck. Here's some cursory information:

```python
import logging
from logdna import LogDNAHandler

LOGGING = {
'version': 1,
'disable_existing_loggers': False,
'formatters': {
'verbose': {
'format': "[%(asctime)s] %(levelname)s [%(name)s:%(lineno)s]" +
"%(message)s",
'datefmt': "%d/%b/%Y %H:%M:%S"
},
'color': {
'()': 'colorlog.ColoredFormatter',
'format': '%(log_color)s%(asctime)s %(levelname)-8s %(name)s %(module)s %(pathname)s:%(lineno)s%(reset)s \n\r\t %(message)s',
'datefmt': "%d/%b/%Y %H:%M:%S",
'log_colors': {
'DEBUG': 'cyan',
'INFO': 'green',
'WARNING': 'yellow',
'ERROR': 'red',
'CRITICAL': 'red,bg_white',
}
}
},
'filters': {
'require_debug_true': {
'()': 'django.utils.log.RequireDebugTrue',
},
},

'handlers': {
'console': {
'level': 'DEBUG',
'filters': ['require_debug_true'],
'class': 'logging.StreamHandler',
'formatter': 'color'
},
'logdna': {
'level': logging.DEBUG,
'class': 'logdna.LogDNAHandler',
'key': "my_secret_key",
'options': {
# 'app': '',
# 'env': "alpha",
'index_meta': True,
},
},
},

'loggers': {
'': {
'level': logging.DEBUG,
'handlers': ['logdna'],
'propagate': True,
},
}
}
```
I am using the above example for Django logging using LogDNA. But when I'm running a Django server, it's getting stuck. For reference I'm using this as a [guide](https://github.com/logdna/python).

Start by reproducing the reported hang with the Django LOGGING configuration in the issue and compare it with the linked LogDNA Python guide. Identify whether the LogDNAHandler configuration causes the server to stop responding, then document a confirmed cause and a verifiable resolution.

Written by the indexing model from the issue text.