Python套接字编程中的错误111连接被拒绝
我有两个python脚本:一个server.py和一个worker.py 这应该是这样工作的:Python套接字编程中的错误111连接被拒绝,python,multithreading,sockets,Python,Multithreading,Sockets,我有两个python脚本:一个server.py和一个worker.py 这应该是这样工作的: - server.py listens on 5005 - workers are started and bind to random ports - they send a message to the server with their port nr - server adds the port to its list of known workers - it does this for e
- server.py listens on 5005
- workers are started and bind to random ports
- they send a message to the server with their port nr
- server adds the port to its list of known workers
- it does this for each worker
def handle_join(worker_ip_port):
worker_ip_port = tuple(worker_ip_port)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
print "Trying to connect to {}".format(worker_ip_port)
for i in range(3):
try:
s.connect(("",int(worker_ip_port[1])))
if worker_ip_port not in WORKERS:
WORKERS.append(worker_ip_port)
print '\t\tNew worker added on {}'.format(worker_ip_port)
print '\t\tWORKERS: {}'.format(WORKERS)
s.send('0'+SIGEND)
s.close()
return 0
except Exception as e:
pass
print '\t\tThat port is already in the worker list'
s.send('1'+SIGEND)
s.close()
return 1
我遇到的问题是,在添加第一个worker并启动另一个worker之后,服务器端出现以下错误:
Traceback (most recent call last):
File "/usr/lib/python2.7/multiprocessing/process.py", line 258, in _bootstrap
self.run()
File "/usr/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "server.py", line 42, in listener
if handle_join(data.split(',')[1:]) == 1:
File "server.py", line 122, in handle_join
s.connect(("",int(worker_ip_port[1])))
File "/usr/lib/python2.7/socket.py", line 224, in meth
return getattr(self._sock,name)(*args)
error: [Errno 111] Connection refused
该应用程序已经有了很大的发展,因此我将在这里只包括相关部分:
server.py:
def handle_join(worker_ip_port):
# e.g. worker_ip_port = 127.0.0.1,55256
#
#
worker_ip_port = tuple(worker_ip_port)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
print "Trying to connect to {}".format(worker_ip_port)
s.connect(("",int(worker_ip_port[1])))
if worker_ip_port not in WORKERS:
WORKERS.append(worker_ip_port)
print '\t\tNew worker added on {}'.format(worker_ip_port)
print '\t\tWORKERS: {}'.format(WORKERS)
s.send('0'+SIGEND)
s.close()
return 0
print '\t\tThat port is already in the worker list'
s.send('1'+SIGEND)
s.close()
return 1
worker.py
def read_socket():
# binds socket, keeps listening
# once connection is accepted, loops over the socket buffer until the
# signal for transmission end
# then returns the data
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
s.bind(("",WORKER_PORT))
print "listening on {}".format(WORKER_PORT)
while True:
buffer = ''
data = True
s.listen(0)
conn, addr = s.accept()
print "accepted connection"
while data:
data = conn.recv(BUFFER_SIZE)
# if the SIGNAL for end of packet is found in current packet
# add only up to that part
# close socket
# return data
if data.find(SIGEND) != -1:
buffer += data[:data.rfind(SIGEND)]
conn.close()
s.close()
return buffer
else:
buffer += data
注意:我试过Linux和Windows。
我已经阅读了网站上的所有其他建议,以及我在谷歌上能找到的内容。这些措施似乎都不起作用
已尝试通过telnet连接到第二个工作进程建立的连接:
Trying ::1...
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
据我所知,第二个工人没有从服务器获得任何连接
netstat的输出也很有趣:
tcp 0 0 0.0.0.0:55271 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:5005 127.0.0.1:55271 TIME_WAIT
55271是第二个工作者绑定到的端口;
下面的连接是它用来向服务器发送“我在这里”消息的连接
tcp 0 0 0.0.0.0:55269 0.0.0.0:* LISTEN
tcp 0 0 127.0.0.1:59240 127.0.0.1:55269 TIME_WAIT
tcp 0 0 127.0.0.1:5005 127.0.0.1:55269 TIME_WAIT
在第一个worker(这里是55269)的例子中,我可以看到有两个连接。应该如此。第一个从工作者到服务器,带有“我在这里”。第二个从服务器发送到工作人员,发送确认信息,确认一切正常,并且现在已在其工作人员列表中
我正在使用多处理框架。那会是个问题吗 已解决。在server.py中添加了一个try,如下所示:
- server.py listens on 5005
- workers are started and bind to random ports
- they send a message to the server with their port nr
- server adds the port to its list of known workers
- it does this for each worker
def handle_join(worker_ip_port):
worker_ip_port = tuple(worker_ip_port)
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.setsockopt(socket.SOL_SOCKET, socket.SO_REUSEADDR, 1)
print "Trying to connect to {}".format(worker_ip_port)
for i in range(3):
try:
s.connect(("",int(worker_ip_port[1])))
if worker_ip_port not in WORKERS:
WORKERS.append(worker_ip_port)
print '\t\tNew worker added on {}'.format(worker_ip_port)
print '\t\tWORKERS: {}'.format(WORKERS)
s.send('0'+SIGEND)
s.close()
return 0
except Exception as e:
pass
print '\t\tThat port is already in the worker list'
s.send('1'+SIGEND)
s.close()
return 1
每个
s.accept()
之前的s.listen(0)
在我看来是错误的listen
应该只在套接字上调用一次,而不是在每次accept
之前调用。不是这样。检查下面我的答案。