Python Pyro4名称服务器在添加两个以上的远程对象时冻结

Question

假设我要ping来自不同位置的内容，所以我将ping命令行工具包装到python中，并使用pyro4 prc库来调用它。在

我有一个python Pyro4名称服务器

import Pyro4
Pyro4.config.COMPRESSION = True
Pyro4.naming.startNSloop("ipofnameserver")

和简单的ping服务器：

^{pr2}$

只要我只有两个pingserver，一切都可以，但是在我添加第三个名称服务器之后停止响应。当然，每个pingserver都有唯一的名称。在

例如，我想检查服务器的可用性：

ns  = Pyro4.locateNS(host = "nameserverip", port=9090)
names = ns.list().keys()
print names
print ns.list()
for n in names:
    if n == 'Pyro.NameServer': continue
    proxy = Pyro4.Proxy("PYRONAME:"+n)
    try:
        print n, proxy._Proxy__pyroCreateConnection()
    except:
        print "offline"

这适用于两个ping服务器，但是对于三个ping服务器，它只是在等待一些东西。此脚本的回溯以ctrl+C终止：

   ns  = Pyro4.locateNS(host = "nameserverip", port=9090)
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/naming.py", line 319, in locateNS
    proxy.ping()
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/core.py", line 146, in __call__
    return self.__send(self.__name, args, kwargs)
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/core.py", line 250, in _pyroInvoke
    self.__pyroCreateConnection()
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/core.py", line 312, in __pyroCreateConnection
    msgType, flags, seq, data = MessageFactory.getMessage(conn, None)
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/core.py", line 665, in getMessage
    headerdata = connection.recv(cls.HEADERSIZE)
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/socketutil.py", line 323, in recv
    return receiveData(self.sock, size)
  File "/usr/local/lib/python2.7/dist-packages/Pyro4/socketutil.py", line 104, in receiveData
    data=sock.recv(size, socket.MSG_WAITALL)

strace显示了以下内容：

socket(PF_INET, SOCK_STREAM, IPPROTO_IP) = 3 fcntl(3, F_GETFL)
= 0x2 (flags O_RDWR) fcntl(3, F_SETFL, O_RDWR) = 0 connect(3, {sa_family=AF_INET, sin_port=htons(9090), sin_addr=inet_addr("ipofnameserver")}, 16) = 0 setsockopt(3, SOL_SOCKET, SO_KEEPALIVE, [1], 4) = 0 recvfrom(3,

下面的示例也不起作用，因为它无法将名称解析为pyro_uri，因为它只是等待前面示例中类似的内容。这个例子的有趣之处在于它打印fls，它包含所有远程ping服务器的名称。然后添加第四个pingserver，我甚至无法打印注册的pingserver的名称。在

def _ping((host, firing_location)):
    pinger = Pyro4.Proxy("PYRONAME:" + firing_location)
    return pinger.ping(host)

def ping(host):
    ns  = Pyro4.locateNS(host = "178.209.52.240", port=9090)
    names = ns.list().keys()
    fls = []
    for name in names:
        if name == 'Pyro.NameServer': continue
        fls.append(name)
    print fls
    p = Pool(len(fls))
    jobs = p.map(_ping, zip([host]*len(fls), fls) )
    for j in jobs:
        print j.split("/")[-3], "±", j.split("/")[-1][:-1]
    return jobs

我已经挣扎了两天了，不知道我的代码出了什么问题。在