I'm building a Django server for data collection. However, the program 
seems not capable when the sensing network expands. As time goes on, the 
program doesn't even enter the code piece and report broken pipe/connection 
reset by peer/too many open files errors:

Exception happened during processing of request from ('172.58.139.243', 
30713)Traceback (most recent call last):
  File "/usr/lib/python2.7/SocketServer.py", line 593, in process_request_thread
  File "/usr/lib/python2.7/SocketServer.py", line 334, in finish_request
  File "/usr/lib/python2.7/dist-packages/django/core/servers/basehttp.py", line 
126, in __init__
  File "/usr/lib/python2.7/SocketServer.py", line 651, in __init__
  File "/usr/lib/python2.7/SocketServer.py", line 710, in finish
  File "/usr/lib/python2.7/socket.py", line 279, in close
  File "/usr/lib/python2.7/socket.py", line 303, in flush
error: [Errno 32] Broken pipe
[08/Dec/2016 17:46:47] "POST /Update_Data/ HTTP/1.1" 500 39484Traceback (most 
recent call last):
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 86, in run
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 128, in finish_response
  File "/usr/lib/python2.7/wsgiref/handlers.py", line 217, in write
  File "/usr/lib/python2.7/socket.py", line 324, in write
  File "/usr/lib/python2.7/socket.py", line 303, in flush
error: [Errno 104] Connection reset by peer
File "/usr/lib/python2.7/random.py", line 810, in randomOSError: [Errno 24] Too 
many open files

I checked the open files and it seems like the socket files are never 
closed. The list is full of items like the followings:

python    30404 30522     ubuntu  732u     IPv4 2437194784      0t0        TCP 
192.168.100.2:9003->172.58.137.113:18538 (ESTABLISHED)
python    30404 30522     ubuntu  733u     IPv4 2437194788      0t0        TCP 
192.168.100.2:9003->172.58.137.113:55661 (ESTABLISHED)
python    30404 30522     ubuntu  734u     IPv4 2437194792      0t0        TCP 
192.168.100.2:9003->172.58.137.113:42461 (ESTABLISHED)
python    30404 30522     ubuntu  735u     IPv4 2437194793      0t0        TCP 
192.168.100.2:9003->172.58.137.113:40438 (ESTABLISHED)
python    30404 30522     ubuntu  736u     IPv4 2437194797      0t0        TCP 
192.168.100.2:9003->172.58.137.113:52998 (ESTABLISHED)

Any ideas? Let me know if you need any further information.

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