nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379

待我称王封你为后i 2023-10-12 14:53 7阅读 0赞

#### 一、错误详细 ####

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'captchaController': Unsatisfied dependency expressed through field 'configService'; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sysConfigServiceImpl': Invocation of init method failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is org.springframework.data.redis.connection.PoolException: Could not get a resource from the pool; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
    	org.springframework.boot.devtools.restart.RestartLauncher.run(RestartLauncher.java:49)
    Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sysConfigServiceImpl': Invocation of init method failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is org.springframework.data.redis.connection.PoolException: Could not get a resource from the pool; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
    	
    Caused by: org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is org.springframework.data.redis.connection.PoolException: Could not get a resource from the pool; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
    	
    Caused by: io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379
    	
    Caused by: io.netty.channel.AbstractChannel$AnnotatedConnectException: Connection refused: no further information: localhost/127.0.0.1:6379
    Caused by: java.net.ConnectException: Connection refused: no further information

#### 二、错误分析 ####

上面截取的是idea控制台启动报错的信息，我截取了部分片段，即每段报错信息的开头，通过报错信息，我们能很直观的看到是因为无法连接Redis而抛出的异常。  
但是我的Redis是用的本地的Redis，而且我的Redis已经开启，那为什么会报错呢。  
![在这里插入图片描述][41199b18b5454bf195937519296d4a5d.png]  
我去看了一下配置文件，我的配置文件里面是给Redis设置了密码的。  
![在这里插入图片描述][ff447616bab94cb4b6349e200af3b908.png]  
但是我的Redis服务端并没有设置密码。通过以下命令查看Redis的密码

confifg get requirepass

![在这里插入图片描述][574cd71fdf144192aefb7c3c8a1926b4.png]  
所以问题找到了，是因为后端配置和Redis配置不一样。

#### 三、问题解决 ####

在项目启动时，我们需要Redis的配置和配置文件里面的配置保持一直。必须保持后端和Redis同时拥有密码或者同时不拥有密码。  
如果Redis没有密码，就需要在配置文件中将password一行删掉。或者在Redis中设置与后端配置文件相同的密码。  
Redis设置密码：在redis-cli命令行中输入

conifg set requirepass 123456
    # 其中123456为你需要设置的密码

![在这里插入图片描述][5bfb2593f4ed40c09bbe4d280f2aa569.png]

[41199b18b5454bf195937519296d4a5d.png]: https://img-blog.csdnimg.cn/41199b18b5454bf195937519296d4a5d.png
[ff447616bab94cb4b6349e200af3b908.png]: https://img-blog.csdnimg.cn/ff447616bab94cb4b6349e200af3b908.png
[574cd71fdf144192aefb7c3c8a1926b4.png]: https://img-blog.csdnimg.cn/574cd71fdf144192aefb7c3c8a1926b4.png
[5bfb2593f4ed40c09bbe4d280f2aa569.png]: https://img-blog.csdnimg.cn/5bfb2593f4ed40c09bbe4d280f2aa569.png