Python ThreadPool进程挂起

Question

import sys
import os
import urllib3
urllib3.disable_warnings()
from multiprocessing.pool import ThreadPool
import importlib
from time import gmtime, strftime
import shutil



def check(USERINFO):
    try:
        DO SOMETHING
    except:
        pass
    else:
        try:
            DO SOMETHING
        except:
            pass
        else:
            DO SOMETHING

if __name__ == '__main__':
    file = sys.argv[1]
    p = ThreadPool(processes=int(sys.argv[2]),)
    combos = []
    for x in list(set(open(file, 'r').readlines())):
        combos.append(x)
    p.map(check, combos)
    p.close() 
    p.join() 

我有这样的应用程序，简单但有时会因为＆＃34;挂起而导致卡住了＃34; process.This是太简单的脚本没有办法在任何地方使用错误句柄得到任何错误，idk什么问题，但几乎尝试了一切。

编辑：python版本2.7.14