本文轉載自：http://news.tuxi.com.cn/news/16541999999012402/4020207.html

在應用上telnet埠和ping都沒有問題，為什麼還獲取不到值呢。

先安裝一個redis客戶端進行測試：yum -y install redis

redis-cli -h 192.168.32.12 -p 6887

然後就報錯了：

(error) DENIED Redis is running in protected mode because protected mode is……

後來就檢視配置發現redis.conf 該行也是註釋的：

# requirepass foobared

繼續排查發現和一個引數配置有關係：

連結redis 時只能通過本地localhost (127.0.0.1）這個來連結，而不能用網路ip(192.168..)這個連結，問題然如果用網路ip 連結會報以下的錯誤：

(error) DENIED Redis is running in protected mode because protected mode is enabled, no bind address was specified, no authentication password is requested to clients. In this mode connections are only accepted from the lookback interface. If you want to connect from external computers to Redis you may adopt one of the following solutions: 1) Just disable protected mode sending the command 'CONFIG SET protected-mode no' from the loopback interface by connecting to Redis from the same host the server is running, however MAKE SURE Redis is not publicly accessible from internet if you do so. Use CONFIG REWRITE to make this change permanent. 2) Alternatively you can just disable the protected mode by editing the Redis configuration file, and setting the protected mode option to 'no', and then restarting the server. 3) If you started the server manually just for testing, restart it with the --portected-mode no option. 4) Setup a bind address or an authentication password. NOTE: You only need to do one of the above things in order for the server to start accepting connections from the outside.

是說處於保護模式，只能本地連結，我們需要修改配置檔案../redis.conf

1)開啟配置檔案把下面對應的註釋掉

# bind 127.0.0.1

2)Redis預設不是以守護程序的方式執行，可以通過該配置項修改，使用yes啟用守護程序，設定為no

daemonize no

3)保護模式

protected-mode no

報錯處理：

一、

在對應配置conf檔案中去掉註釋，把yes改為no

#protected-mode yes

protected-mode no

重啟redis（注意有資料時慎重啟）

kill -9 程序號

redis-cli -h 192.168.32.12 -p 6887 shutdown

二、新增認證，設定密碼

# requirepass foobared

requirepass redis123456

驗證

再次用Java程式建立連線池，沒有報錯，且可以對redis server進行資料正常處理。程式報錯日誌不再顯示

問題解決