Python Multithreading returns Bad File Descriptor? -

so, making chat server (how original!), , using multithreading handle data sending/recieving, alongside logging , (soon be) server-sided commands. anyhoo.. run server, far. run client, hey! works! relaunch client , ;

exception in thread thread-5: traceback (most recent call last):   file "c:\python27\lib\threading.py", line 810, in __bootstrap_inner     self.run()   file "c:\users\kuro\desktop\pychat\server.py", line 51, in run     s.listen(9999)   file "c:\python27\lib\socket.py", line 224, in meth     return getattr(self._sock,name)(*args)   file "c:\python27\lib\socket.py", line 170, in _dummy     raise error(ebadf, 'bad file descriptor') error: [errno 9] bad file descriptor 

on server, still works. no errors on client, yet. run client again, , happens; [errno 10061] no connection made because target machine actively refused it. no server in/output. here's server code:

import socket import threading import sys import os import time  s = socket.socket(socket.af_inet, socket.sock_stream) ip = raw_input("ip host server on: ") port = 9340 dat = none s.bind((ip,port))  class recvdat(threading.thread):     def __init__(self, tid, tn):         threading.thread.__init__(self)         self.tid = tid         self.tn = tn     def run(self):         global dat, conn         while true:             try:                 dat = conn.recv(1048)             except:                 dat = none                 s.close()                 break             if dat == "/exit" or none:                 s.close()                 break             else:                 print dat                 chtlg.write(dat)                 dat = none   class senddat(threading.thread):     def __init__(self, tid, tn):         threading.thread.__init__(self)         self.tid = tid         self.tn = tn     def run(self):         pass  class acconn(threading.thread):     def __init__(self, tid, tn):         threading.thread.__init__(self)         self.tid = tid         self.tn = tn     def run(self):         global conn, act, actid         s.listen(9999)         conn, addr = s.accept()         rdt = recvdat(2,"rdt")         actid = actid+1         act = acconn(actid,"act")         act.start()         rdt.start()         #print "client connected ip "+addr  cwd = os.getcwd() chtlg = open(cwd+"/chatlog",'a') actid = 0  act = acconn(actid,"act")  act.start()  while true:     time.sleep(2.5)     pass 

yes, very bad excuse of multithreading program, however, incomplete because buried in making client, , don't use classes or multithreading often..

any @ appreciated!