thread.error：無法啓動新的線程

Question

我的服務器有32個CPU和基於Centos6.I 32G內存基於twisted.Now我用這樣的Python代碼測試它寫了一個TCP服務器：

# -*- coding: UTF-8 -*-. 

import socket, optparse, time, os, threading 
from sensor import Sensor 


def strWrapper(sock, data): 
    host, port = sock.getsockname() # local IP_addr 
    str = '%s:%s,%d,%s,%s\r\n' % (host, port, data[0], data[1], data[2]) 
    return str 


def main(threadID, args): 

    options, address = args 
    host, port = address # remote addr 
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
    s.connect(address) 
    print "%d.Connected with %s:%s" % (threadID, host, port) 
    sensor = Sensor(options.typeid) 

    for j in xrange(0, 5000): 
     #sensor.get_data() generate some random number 
     req = strWrapper(s, sensor.get_data())  
     s.send(req) 

    s.close() 


if __name__ == '__main__': 
    start = time.time() 
    args = parse_args() 
    threads = [] 
    for i in xrange(0, 10000): 
     thread = threading.Thread(target=main, args=(i, args)) 
     threads.append(thread) 
    for thr in threads: 
     thr.start() 
    #   thr.join() 
    # end = time.time() 
    # print 'Task runs %0.2f seconds.' % ((end - start)) 

然而，當有684個線程客戶端得到一個錯誤：

... 
680.Connected with 10.10.102.9:10010 
681.Connected with 10.10.102.9:10010 
682.Connected with 10.10.102.9:10010 
683.Connected with 10.10.102.9:10010 
684.Connected with 10.10.102.9:10010 
Traceback (most recent call last): 
    File "client/tcpclient.py", line 85, in <module> 
    thr.start() 
    File "/usr/local/lib/python2.7/threading.py", line 745, in start 
    _start_new_thread(self.__bootstrap,()) 
thread.error: can't start new thread 

怎麼可能我會在租賃10000連接線沒有錯誤？測試代碼有什麼問題？任何人都可以幫助我？提前致謝〜

Answer 1

您可能受限於/proc/sys/kernel/threads-max的值。更多信息here。

無論如何，你不希望只有1000個線程來監視TCP連接。使用異步io。