>新人刚弄的新环境，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