JedisConnectionException: Failed connecting to host localhost:6379

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JedisConnectionException: Failed connecting to host localhost:6379

报错原因:没有启动服务,打开服务即可 redis.clients.jedis.exceptions.JedisConnectionException: Exception at redis.clients.jedis.Connection.connect(Connection.java:) at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:) at redis.clients.jedis.Connection.sendCo…

redis.exceptions.ConnectionError: Error 111 connecting to localhost:6379. Connection refused.

$ pip install redis>>> import redis>>> conn = redis.Redis()>>> conn.keys('*')Traceback (most recent call last): File "/home/henry/.local/lib/python3.5/site-packages/redis/connection.py", line 484, in connect sock = sel…

JDBC 连Sql Server 接数据库--The TCP/IP connection to the host localhost, port 1433 has failed

原文:https://blog.csdn.net/qq_39241986/article/details/80848855 这样的错误,你有遇到过吗? The TCP/IP connection to the host localhost, port 1433 has failed. 1 com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host localhost, port 1433 h…

TNS-12545: Connect failed because target host or object does not exist

问题描述 $ lsnrctl startLSNRCTL for Linux: Version 12.1.0.2.0 - Production on 26-JUL-2017 09:53:42Copyright (c) 1991, 2014, Oracle. All rights reserved.Connecting to (DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=mengqf)(PORT=1521)))TNS-12545: Connect failed…

xshell连接不了虚拟机处理方法（错误提示：Connection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(localhost) at 08:47:23.）

一.问题描述:xshell连接不了虚拟机,出现错误提示:Connection closing...Socket close.Connection closed by foreign host.Disconnected from remote host(localhost) at 08:47:23. 二.查找错误原因: 1.登录虚拟机,打开终端,切换到root用户,输入systemctl start sshd.service看能否开启sshd服务,提示开启失败,输入systemctl status…