Java连接Redis时出现“ERR Client sent AUTH, but no password is set”异常的原因及解决办法

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当使用Java连接Redis时遇到'ERR Client sent AUTH, but no password is set'错误，通常是由于Redis服务器未设置密码但客户端尝试认证导致。解决方法包括检查Redis配置文件并设置密码，然后重启Redis服务。" 49074111,4843097,Android自定义View：跟随手指滑动的彩色小球实现,"['Android开发', '自定义View', '图形绘制']

同事刚弄的新环境，Redis 出了个问题，叫我看看。

原因

他给我的报错如下，

我到主机上重新看了下，完整的报错如下：

org.springframework.data.redis.RedisConnectionFailureException: Cannot get Jedis connection; nested exception is redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
        at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:204)
        at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.getConnection(JedisConnectionFactory.java:348)
        at org.springframework.data.redis.core.RedisConnectionUtils.doGetConnection(RedisConnectionUtils.java:129)
        at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:92)
        at org.springframework.data.redis.core.RedisConnectionUtils.getConnection(RedisConnectionUtils.java:79)
        at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:194)
        at org.springframework.data.redis.core.RedisTemplate.execute(RedisTemplate.java:169)
        at org.springframework.data.redis.core.AbstractOperations.execute(AbstractOperations.java:91)
        at org.springframework.data.redis.core.DefaultValueOperations.set(DefaultValueOperations.java:182)
        at com.cmi.mvno.common.redis.RedisCacheUtils.setString(RedisCacheUtils.java:58)
        at com.cmi.mvno.web.filter.xss.XssFilter.doFilter(XssFilter.java:57)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.boot.actuate.trace.WebRequestTraceFilter.doFilterInternal(WebRequestTraceFilter.java:110)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:208)
        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:177)
        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:347)
        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:263)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.web.filter.HttpPutFormContentFilter.doFilterInternal(HttpPutFormContentFilter.java:108)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:81)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at com.ai.ecs.websecurite.filter.DesSecuriteFilter.doRealFilter(DesSecuriteFilter.java:278)
        at com.ai.ecs.websecurite.filter.DesSecuriteFilter.doFilter(DesSecuriteFilter.java:210)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:197)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.springframework.boot.actuate.autoconfigure.MetricsFilter.doFilterInternal(MetricsFilter.java:106)
        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193)
        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166)
        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:199)
        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478)
        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342)
        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:803)
        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868)
        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1459)
        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
        at java.lang.Thread.run(Thread.java:748)
Caused by: redis.clients.jedis.exceptions.JedisConnectionException: Could not get a resource from the pool
        at redis.clients.util.Pool.getResource(Pool.java:53)
        at redis.clients.jedis.JedisPool.getResource(JedisPool.java:226)
        at redis.clients.jedis.JedisPool.getResource(JedisPool.java:16)
        at org.springframework.data.redis.connection.jedis.JedisConnectionFactory.fetchJedisConnector(JedisConnectionFactory.java:194)
        ... 62 common frames omitted
Caused by: redis.clients.jedis.exceptions.JedisDataException: ERR Client sent AUTH, but no password is set
        at redis.clients.jedis.Protocol.processError(Protocol.java:127)
        at redis.clients.jedis.Protocol.process(Protocol.java:161)
        at redis.clients.jedis.Protocol.read(Protocol.java:215)
        at redis.clients.jedis.Connection.readProtocolWithCheckingBroken(Connection.java:340)
        at redis.clients.jedis.Connection.getStatusCodeReply(Connection.java:239)
        at redis.clients.jedis.BinaryJedis.auth(BinaryJedis.java:2139)
        at redis.clients.jedis.JedisFactory.makeObject(JedisFactory.java:108)
        at org.apache.commons.pool2.impl.GenericObjectPool.create(GenericObjectPool.java:888)
        at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:432)
        at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:361)
        at redis.clients.util.Pool.getResource(Pool.java:49)
        ... 65 common frames omitted

他可能只注意到 “Could not get a resource from the pool” 的报错，没有注意到下面还有一句 “ERR Client sent AUTH, but no password is set”

这个报错的原因是 Redis 服务器没有设置密码，但客户端向其发送了AUTH（authentication，身份验证）请求。

然后我到 Redis 主机看了下他的配置文件，

果然是没有设置的。

解决

知道了问题的原因，解决的办法就简单了呗。
对症下药，修改 Redis 的配置，设置上密码，重启 Redis 就行了。

 requirepass 要设置的密码

扩展

Redis 重启方法：

/usr/local/redis/bin/redis-server stop
/usr/local/redis/bin/redis-server start
/usr/local/redis/bin/redis-server restart

/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf

重启出现以下报错时：
Fatal error, can’t open config file ‘restart’

ps -ef|grep redis

kill -9 进程号

在重新配置一下

/usr/local/redis/bin/redis-server /usr/local/redis/etc/redis.conf

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