问题描述

启动瑞吉外卖项目后，在测试采用Redis的功能时报错（页面状态码为500，是服务器端出错）：

Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Request processing failed; nested exception is org.springframework.data.redis.RedisConnectionFailureException: Unable to connect to Redis; nested exception is io.lettuce.core.RedisConnectionException: Unable to connect to localhost:6379] with root cause
java.net.ConnectException: 拒绝连接
at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method) ~[na:1.8.0_171]
at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717) ~[na:1.8.0_171]
at io.netty.channel.socket.nio.NioSocketChannel.doFinishConnect(NioSocketChannel.java:330) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.channel.nio.AbstractNioChannel$AbstractNioUnsafe.finishConnect(AbstractNioChannel.java:334) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:707) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:655) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:581) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:493) ~[netty-transport-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:989) ~[netty-common-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74) ~[netty-common-4.1.63.Final.jar!/:4.1.63.Final]
at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30) ~[netty-common-4.1.63.Final.jar!/:4.1.63.Final]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_171]

分析与解决

我在本地运行了redis-server.exe，由于是直接双击运行的，没有指定配置文件，所以采用了默认配置，而默认配置并不能满足需求。
解决：

1. 由于是远程连接（非localhost），需要修改配置文件redis.windows.conf
   1. 将bind 127.0.0.1注释掉
   2. 将protected-mode yes改为protected-mode no
2. 在redis-server.exe安装目录下，按住shift并鼠标右键，打开命令行窗口
3. 执行.\redis-server.exe .\redis.windows.conf