Jedis远程连接Redis服务器报错（connect time out）解决方案

前言

通过redis的java客户端Jedis远程连接redis服务器报错，错误信息如下：

redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
at redis.clients.util.Pool.getResource(Pool.java:40)
at com.firstelite.util.RedisClient.<init>(RedisClient.java:27)
at com.firstelite.util.Test.main(Test.java:7)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out
at redis.clients.jedis.Connection.connect(Connection.java:137)
at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:65)
at redis.clients.jedis.BinaryJedis.connect(BinaryJedis.java:1706)
at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:28)
at org.apache.commons.pool.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:1188)
at redis.clients.util.Pool.getResource(Pool.java:38)
... 2 more
Caused by: java.net.SocketTimeoutException: connect timed out
at java.net.DualStackPlainSocketImpl.waitForConnect(Native Method)
at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:75)
at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:337)
at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:198)
at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:157)
at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:391)
at java.net.Socket.connect(Socket.java:579)
at redis.clients.jedis.Connection.connect(Connection.java:132)
... 7 more

很明显连接超时，经过错误排查发现是安装Redis的CentOS的防火墙没有关闭，所以关闭防火墙即可。

Close Firewall

在CentOS 7中默认使用firewall做为防火墙，下面是启动&关闭防火墙的命令：

// 启动firewall
systemctl start firewalld.service
// 关闭firewall
systemctl stop firewalld.service

我们输入第二个关闭命令即可，再次运行Java程序即可正常远程调用Redis。

总结

简单记录一下解决方案，仅供参考，The End。