UDP Socket Invalid Argument exception #29992

2017-01-09 09:01:53,170 - ERROR: Exception catched for address: 10.99.0.153
Traceback (most recent call last):
  File "./server.py", line 56, in <module>
    sock.sendto(bytes('{}'.format(i), "utf-8"), (address, PORT))
OSError: [Errno 22] Invalid argument
Describe the results you expected:

Every packet should be sent with no error
Additional information you deem important (e.g. issue happens only occasionally):

During the same run a node will one time be able to send the packet and the next time fail.
We can see this in the following log:  https://gist.github.com/jocelynthode/dc0ceea7658e6722cb9a5c2f3db5576a
I am currently using Docker 1.12.2 although the problem also happens on Docker 1.12.5. This problem does not seem to appear on a inhouse OpenNebula cluster we use. We can only reproduce this problem on AWS (Either using Ubuntu server 16.04 or Debian stretch).
Here is the UDP class I use to send messages : https://github.com/jocelynthode/EpTOTester/blob/aws-test/projects/EpTOTester/scripts/server.py
Here is the tracker I use : https://github.com/jocelynthode/EpTOTester/blob/aws-test/projects/EpTOTester/tracker/tracker.py
Output of docker version:
Client:
 Version:      1.12.2
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   bb80604
 Built:        Tue Oct 11 18:29:41 2016
 OS/Arch:      linux/amd64
Server:
 Version:      1.12.2
 API version:  1.24
 Go version:   go1.6.3
 Git commit:   bb80604
 Built:        Tue Oct 11 18:29:41 2016
 OS/Arch:      linux/amd64
Output of docker info:
Containers: 0
 Running: 0
 Paused: 0
 Stopped: 0
Images: 3
Server Version: 1.12.2
Storage Driver: aufs
 Root Dir: /var/lib/docker/aufs
 Backing Filesystem: extfs
 Dirs: 18
 Dirperm1 Supported: true
Logging Driver: json-file
Cgroup Driver: cgroupfs
Plugins:
 Volume: local
 Network: host bridge overlay null
Swarm: active
 NodeID: ek9vxftn7noow9gw3bbhb9ue9
 Is Manager: true
 ClusterID: c960n73tqhh9lr45tm0qywac1
 Managers: 1
 Nodes: 5
 Orchestration:
  Task History Retention Limit: 10
 Raft:
  Snapshot Interval: 10000
  Heartbeat Tick: 1
  Election Tick: 3
 Dispatcher:
  Heartbeat Period: 5 seconds
 CA Configuration:
  Expiry Duration: 3 months
 Node Address: 172.31.17.24
Runtimes: runc
Default Runtime: runc
Security Options: apparmor seccomp
Kernel Version: 4.4.0-57-generic
Operating System: Ubuntu 16.04.1 LTS
OSType: linux
Architecture: x86_64
CPUs: 4
Total Memory: 7.303 GiB
Name: ip-172-31-17-24
ID: FE2S:3IMA:UZAP:HOEA:YAOR:3OR4:WILJ:EN3L:A5HR:GI5Q:SKTQ:LYL3
Docker Root Dir: /var/lib/docker
Debug Mode (client): false
Debug Mode (server): false
Registry: https://index.docker.io/v1/
WARNING: No swap limit support
Insecure Registries:
 127.0.0.0/8
Additional environment details (AWS, VirtualBox, physical, etc.):
I'm using 5 EC2 containers of the type c4.xlarge with Ubuntu server 16.04.
I'm using Docker 1.12.2 but the problem is the same with Docker 1.12.5