我有一个代码,其中有13个客户端必须连接到服务器。然后服务器根据客户机提供的数据执行一些操作。在角色转换之后-服务器变成客户机,客户机变成服务器来接收数据。
问题是,当尝试进行第一次连接时,也就是当13个客户端尝试连接到服务器时,我一直收到这个错误:[Errno 104] Connection reset by peer
。我尝试了一些解决方法,例如在第二个时间间隔内尝试连接5次,但没有任何效果。
这里是我的代码:
import socket, pickle, numpy as np
import struct
import math
while 1:
HOST = ''
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(13)
adresses = []
ports = []
i = 0
print("receiving...")
while i < 13:
i += 1
#wait to accept a connection - blocking call
conn, addr = s.accept()
print ('Connected with ', addr)
adresses.append(addr[0])
buf = b''
while len(buf) < 4:
buf += conn.recv(4 - len(buf))
length = struct.unpack('>I', buf)[0]
data = b''
l = length
while l > 0:
d = conn.recv(l)
l -= len(d)
data += d
if not data: break
M = np.loads(data)
if i == 1:
L = M[0]
else:
L += M[0]
ports.append(M[1])
conn.close()
s.close()
L /= 993040
packet = pickle.dumps(L)
length = struct.pack('>I', len(packet))
packet = length + packet
print("sending...")
for kl, addr in enumerate(adresses):
HOST = addr
PORT = 50007 + ports[kl]
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.sendall(packet)
s.close()
def connection(centers, kl):
HOST = "192.168.143.XX"
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.settimeout(3600)
try:
s.connect((HOST, PORT)) # HERE IS AN ERROR
s.settimeout(None)
packet = pickle.dumps([centers, kl]) ## ???
length = struct.pack('>I', len(packet))
packet = length + packet
s.sendall(packet) # OR HERE IS AN ERROR
s.close()
except Exception as e:
print(e)
print('error ', kl)
s.close()
return np.zeros(centers.shape)
HOST = ''
PORT = 50007 + kl
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(2)
i = 0
while i < 1:
#wait to accept a connection - blocking call
conn, addr = s.accept()
i += 1
print ('Connected with ', addr)
buf = b''
while len(buf) < 4:
buf += conn.recv(4 - len(buf))
length = struct.unpack('>I', buf)[0]
data = b''
l = length
while l > 0:
d = conn.recv(l)
l -= len(d)
data += d
if not data: break
new_centers = np.loads(data)
conn.close()
s.close()
return new_centers
aa = 0
for k in range(99):
print(k)
centers = some_function(centers)
time.sleep(60)
centers1 = connection(centers, i)
aa = 0
while not (centers1.any()) and aa < 5:
time.sleep(1)
centers1 = connection(centers, i)
aa += 1
centers = centers1
问题是所有13个客户机都必须连接到服务器,否则将无法继续下一次迭代。 我正在使用Python3.4。 请帮忙。
更新:
我添加了线程,但错误仍然存在:
[Errno 104] Connection reset by peer
import socket, pickle, numpy as np
import struct
import math
from multiprocessing.pool import ThreadPool
def clientthread(conn, L):
buf = b''
while len(buf) < 4:
buf += conn.recv(4 - len(buf))
length = struct.unpack('>I', buf)[0]
data = b''
l = length
while l > 0:
d = conn.recv(l)
l -= len(d)
data += d
M = np.loads(data)
return(M)
j = 0
while 1:
HOST = ''
PORT = 50007
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(2)
#print('0')
adresses = []
ports = []
i = 0
print("receiving...")
while i < 13:
i += 1
#wait to accept a connection - blocking call
conn, addr = s.accept()
print ('Connected with ', addr)
adresses.append(addr[0])
pool = ThreadPool(processes=13)
async_result = pool.apply_async(clientthread, (conn, i,))
M = async_result.get()
conn.close()
if i == 1:
L = M[0]
else:
L += M[0]
ports.append(M[1])
s.close()
L /= 993040
packet = pickle.dumps(L)
length = struct.pack('>I', len(packet))
packet = length + packet
for kl, addr in enumerate(adresses):
HOST = addr
PORT = 50007 + ports[kl]
s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((HOST, PORT))
s.sendall(packet)
s.close()
您必须在服务器上使用线程。
有关简单的解释,请参见:http://www.binarytides.com/python-socket-server-code-example/
下面这个简单例子的要点是:
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客户端似乎已连接到服务器,但在尝试发送数据时遇到“
[Errno 104] Connection reset by peer
”异常。Python第一次引发“[Errno 104]Connection reset by peer”异常,然后第二次甚至更多地在客户端出现“[Errno 32]Broken pipe”异常。这可能意味着服务器正在启动并监听端口(否则,您将得到“
[Errno 111] Connection refused" exception on the client side
”。这也意味着服务器在关闭连接之前崩溃,因为如果在客户端发送数据之前在服务器端关闭了连接,则客户端将遇到“[Errno 32] Broken pipe
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