We don't have debug logging in dogstatsd as it can potentially receive a huge amount of data and logging the incoming udp packets will kill cpu/disk. Sometimes we need to see that data though when trying to debug dogstatsd submission, so here is a hacky way to do it.
To apply it:
cd /
curl https://gist.github.com/clofresh/7883109/raw/75718cf42179d2199643daeea47fcec387e42281/dogstatsd_debug.py.patch | sudo patch -p 0
sudo service datadog-agent restart