【Azure Redis 缓存】 Python连接Azure Redis, 使用redis.ConnectionPool 出现 "ConnectionResetError: [Errno 104] Connection reset by peer"

技术分享 3年前 (2022-05-12) 0 999+

问题描述

Python连接Azure Redis, 使用redis.ConnectionPool 出现 "ConnectionResetError: [Errno 104] Connection reset by peer" "ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host"

Traceback (most recent call last):   File "C:UsersAppDataLocalProgramsPythonPython310libsite-packagesredisconnection.py", line 748, in read_response     response = self._parser.read_response()   File "C:UsersAppDataLocalProgramsPythonPython310libsite-packagesredisconnection.py", line 318, in read_response     raw = self._buffer.readline()   File "C:UsersAppDataLocalProgramsPythonPython310libsite-packagesredisconnection.py", line 250, in readline     self._read_from_socket()   File "C:UsersAppDataLocalProgramsPythonPython310libsite-packagesredisconnection.py", line 192, in _read_from_socket     data = self._sock.recv(socket_read_size) ConnectionResetError: [WinError 10054] An existing connection was forcibly closed by the remote host  During handling of the above exception, another exception occurred: ... ...

连接出错的Python代码为：

import redis  redis_params = {     'host': 'redis-xxxxxx.redis.cache.chinacloudapi.cn',     'port': 6380,     'db': 1,     'password': 'xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx=',     'timeout': 5000,     'ssl': True }  print('-----Try # 2------: Redis 使用连接池 ')  print('connected to redis by connection pool ...') pool = redis.ConnectionPool( host=redis_params['host'], port=redis_params['port'], db=redis_params['db'], password=redis_params['password'], max_connections=20) conn_pool = redis.Redis(connection_pool=pool, socket_timeout=redis_params['timeout'], ssl=redis_params['ssl'], health_check_interval=30)   conn_pool.set('test03', 'Value 结果显示在此') data = conn_pool.get('test03').decode() print(data)  print('Connection Pool use Successful')

而在不使用 ConnectionPool 的情况下，是能够正常连接的。

print('-----Try # 1------: Redis 没有使用连接池的情况下: ') conn = redis.Redis(host=redis_params['host'], port=redis_params['port'], db=redis_params['db'], password=redis_params['password'], ssl=redis_params['ssl'], socket_timeout=redis_params['timeout']) print('connected to redis') conn.set('test', 'the normal value to set ') print('set done .... ')

问题解答

根据redis.py的源码查看，使用redis.Redis 当ssl为True时，构造函数中为 connection_class参数初始化值为 SSLConnection。而ConnectionPool的构造函数中默认使用的是 connection_class=Connection。

redis.Redis

redis.ConnectionPool

根据以上分析，要解决Python Redis使用Connection Pool连接，只需要在创建Connection Pool对象时候，为Connection_class对象赋值为SSLConnection。

修改后的代码为：

import redis  from redis.connection import SSLConnection  redis_params = {     'host': 'redis-xxxxxx.redis.cache.chinacloudapi.cn',     'port': 6380,     'db': 1,     'password': 'xxxxxxxxxxxxxxxxxxx=',     'timeout': 5000,     'ssl': True }  print('-----Try # 1------: Redis 没有使用连接池的情况下: ') conn = redis.Redis(host=redis_params['host'], port=redis_params['port'], db=redis_params['db'], password=redis_params['password'], ssl=redis_params['ssl'], socket_timeout=redis_params['timeout']) print('connected to redis') conn.set('test', 'the normal value to set ') print('set done .... ')  data = conn.get('test').decode() print(str(data))  print('-----Try # 2------: Redis 使用连接池 ')  print('connected to redis by connection pool ...') pool = redis.ConnectionPool(connection_class= SSLConnection, host=redis_params['host'], port=redis_params['port'], db=redis_params['db'], password=redis_params['password'], max_connections=20) conn_pool = redis.Redis(connection_pool=pool, socket_timeout=redis_params['timeout'], ssl=redis_params['ssl'], health_check_interval=30)   conn_pool.set('test03', 'Value 结果显示在此') data = conn_pool.get('test03').decode() print(data)  print('Connection Pool use Successful')  for i in range(1,10):     conn_pool_1 = redis.Redis(connection_pool=pool, socket_timeout=redis_params['timeout'], ssl=redis_params['ssl'], health_check_interval=30)     conn_pool_1.set('test_test__'+str(i), 'use conn pool to set value.......')     print(conn_pool_1.client)    clist = conn_pool.client_list() for c in clist:     print(c)