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redis远程连接超时



     今天在用jedis连接远程的redis时,抛出连接超时异常:connect timed out。具体信息如下:

Exception in thread "main" redis.clients.jedis.exceptions.JedisConnectionException: java.net.SocketTimeoutException: connect timed out
	at redis.clients.jedis.Connection.connect(Connection.java:142)
	at redis.clients.jedis.BinaryClient.connect(BinaryClient.java:75)
	at redis.clients.jedis.Connection.sendCommand(Connection.java:83)
	at redis.clients.jedis.BinaryClient.set(BinaryClient.java:92)
	at redis.clients.jedis.Client.set(Client.java:23)
	at redis.clients.jedis.Jedis.set(Jedis.java:53)
	at com.ado.test.redis.RedisTest.main(RedisTest.java:10)
Caused by: java.net.SocketTimeoutException: connect timed out
	at java.net.PlainSocketImpl.socketConnect(Native Method)
	at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:351)
	at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:213)
	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:200)
	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
	at java.net.Socket.connect(Socket.java:529)
	at redis.clients.jedis.Connection.connect(Connection.java:137)
	... 6 more

    经过确认,排除了几种可能:

    1、服务器地址配置错误。(经确认,配置无误。)

    2、redis连接数量过多。(经确认,没有任何连接在redis服务器上。)

    查看jedis连接源码,也没发现有什么异常,于是怀疑是redis主机的问题。使用telnet命令进行测试,发现也是连接不上。于是怀疑是redis服务器防火墙没关闭。

    查看服务器防火墙状态:

services iptables status


    关闭防火墙:

services iptables stop


    然后再进行连接,这次就很快连接成功了。问题解决。


redis远程连接超时