python os fork 监听socket问题

[很水的长毛怪兽]

main.py

import os, socket, sys
from worker import Worker

print os.getpid(), 'process start'

sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
sock.setblocking(0)
sock.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
sock.bind(("127.0.0.1", 5000))
sock.listen(10)

for i in range(3):

    w = Worker(i, os.getpid(), sock)
    pid = os.fork()
    if pid != 0:
        continue

    try:
        w.run()
    except SystemExit:
        raise
    except:
        sys.exit(-1)

import time

time.sleep(20)
print 'end!'

woker.py

import errno
import os
import select
import socket


class Worker(object):
    def __init__(self, workerid, ppid, socket):
        self.id = workerid
        self.ppid = ppid
        self.socket = socket
        self.socket.setblocking(0)
        self.address = self.socket.getsockname()
        self.timeout = 10
        self.alive = True

    def run(self):
        while self.alive:
            nr = 0
            while self.alive:
                try:
                    client, addr = self.socket.accept()
                    msg = client.recv(1024)
                    print msg.decode(), os.getpid()
                    print '--------------'
                    nr += 1
                except socket.error, e:
                    if e[0] in (errno.EAGAIN, errno.ECONNABORTED):
                        print 'socket.error', os.getpid()
                        break  # Uh oh!

                    raise
                if nr == 0: break

            while self.alive:
                try:
                    ret = select.select([self.socket], [], [],
                                        self.timeout)
                    if ret[0]:
                        break
                except select.error, e:
                    if e[0] == errno.EINTR:
                        print 'select error', os.getpid()
                        break
                    raise

这样子，所有进程都不能accpet到client端的连接。
都会进入 ‘socket.error’ 那个exception里面

求解。。

[屎克螂]

因为你设置了非阻塞sock.setblocking(0)

[很水的长毛怪兽]

引用 1 楼 uiuiy1 的回复:

因为你设置了非阻塞sock.setblocking(0)

为什么设置了阻塞就会那样呢？