idea连接云服务器上的redis报错Failed to connect to any host resolved for DNS name.已解决

idea连接腾讯云服务器报错【已解决】

错误如下所示

	at redis.clients.jedis.DefaultJedisSocketFactory.connectToFirstSuccessfulHost(DefaultJedisSocketFactory.java:63)
	at redis.clients.jedis.DefaultJedisSocketFactory.createSocket(DefaultJedisSocketFactory.java:87)
	at redis.clients.jedis.Connection.connect(Connection.java:180)
	at redis.clients.jedis.Connection.sendCommand(Connection.java:152)
	at redis.clients.jedis.Connection.executeCommand(Connection.java:121)
	at redis.clients.jedis.Jedis.keys(Jedis.java:5009)
	at com.wyp168.jedis.JedisDemo01.testJedis(JedisDemo01.java:22)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:498)
	at org.testng.internal.invokers.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:135)
	at org.testng.internal.invokers.TestInvoker.invokeMethod(TestInvoker.java:673)
	at org.testng.internal.invokers.TestInvoker.invokeTestMethod(TestInvoker.java:220)
	at org.testng.internal.invokers.MethodRunner.runInSequence(MethodRunner.java:50)
	at org.testng.internal.invokers.TestInvoker$MethodInvocationAgent.invoke(TestInvoker.java:945)
	at org.testng.internal.invokers.TestInvoker.invokeTestMethods(TestInvoker.java:193)
	at org.testng.internal.invokers.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:146)
	at org.testng.internal.invokers.TestMethodWorker.run(TestMethodWorker.java:128)
	at java.util.ArrayList.forEach(ArrayList.java:1259)
	at org.testng.TestRunner.privateRun(TestRunner.java:808)
	at org.testng.TestRunner.run(TestRunner.java:603)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:429)
	at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:423)
	at org.testng.SuiteRunner.privateRun(SuiteRunner.java:383)
	at org.testng.SuiteRunner.run(SuiteRunner.java:326)
	at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52)
	at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:95)
	at org.testng.TestNG.runSuitesSequentially(TestNG.java:1249)
	at org.testng.TestNG.runSuitesLocally(TestNG.java:1169)
	at org.testng.TestNG.runSuites(TestNG.java:1092)
	at org.testng.TestNG.run(TestNG.java:1060)
	at com.intellij.rt.testng.IDEARemoteTestNG.run(IDEARemoteTestNG.java:66)
	at com.intellij.rt.testng.RemoteTestNGStarter.main(RemoteTestNGStarter.java:109)
	Suppressed: java.net.ConnectException: Connection refused (Connection refused)
		at java.net.PlainSocketImpl.socketConnect(Native Method)
		at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
		at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
		at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
		at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
		at java.net.Socket.connect(Socket.java:613)
		at redis.clients.jedis.DefaultJedisSocketFactory.connectToFirstSuccessfulHost(DefaultJedisSocketFactory.java:73)
		... 33 more

错误分析

1. redis关闭了远程连接，需要在redis.conf中修改
2. 防火墙拦截了6379端口，需要放行端口
3. 如果是阿里云服务器需要配置安全组(在阿里服务器控制台中配置)
4. 如果是腾讯云服务器则需要在腾讯云服务器上开放端口，远程主机才能进行访问

解决方法

修改redis.conf中的配置文件

输入以下命令

vim /etc/redis.conf

在一般模式下输入以下命令【搜索】

/bind 127.0.0.1

找到上述图片高亮部分，并注释该行
再在一般模式下输入以下命令

/protected-mode

将上图高亮部分的yes改为no（关闭保护模式）

更改防火墙配置，放行6379端口

输入以下命令，放行6379端口，并重启防火墙

firewall-cmd --zone=public --add-port=6379/tcp --permanent
systemctl restart firewalld

注意：一定要重启防火墙，不然不会生效
重启防火墙之后重启redis，输入如下命令

1.先通过 ps -ef | grep redis 命令查询redis的进程号
2.执行 kill -9 pid 停止redis进程
3.执行redis-server /etc/redis.conf 命令，以守护模式开启redis服务

到这里，问题就解决了，我们就可以通过idea来远程操作腾讯云服务器上的redis了。

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