redis连接超时--Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: Failed connecting to host xxxxx:6379

一，在redis开发中遇到下面的错误

Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: Failed connecting to host XXXX:6379
    at redis.clients.jedis.Connection.connect(Connection.java:204)
    at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:100)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:125)
    at redis.clients.jedis.Connection.sendCommand(Connection.java:120)
    at redis.clients.jedis.BinaryClient.multi(BinaryClient.java:523)
    at redis.clients.jedis.BinaryJedis.multi(BinaryJedis.java:1877)
    at com.redis.TestTX.main(TestTX.java:19)
Caused by: java.net.SocketTimeoutException: connect timed out
    at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
    at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:85)
    at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
    at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    at java.net.Socket.connect(Socket.java:589)
    at redis.clients.jedis.Connection.connect(Connection.java:181)
    ... 6 more

二，解决办法

1）修改配置文件

注释掉bind，protected-mode为no

2）查看远程服务器的防火墙状态

systemctl status firewalld

防火墙为开启状态；

3）按照步骤执行一下命令

//查看防火墙状态
firewall-cmd --state

//开放6379端口
firewall-cmd --permanent --add-port=6379/tcp

//查看端口，执行
firewall-cmd --permanent --query-port=6379/tcp

firewall-cmd --permanent --list-ports
//重启防火墙
firewall-cmd --reload

4）重启redis

redis-cli -p 6379 shutdown
redis-server /opt/redis/back_config/redis.conf

注释：back_config是我存放redis.conf的地方，请根据自己的实际情况执行

5）测试一下连接是否成功

Jedis jedis = new Jedis("IP",6379);
System.out.println(jedis.ping());

问题解决。