Springboot+ Redis Could not get a resource since the pool is exhausted] with root cause

问题描述：
SpringBoot + 虚拟机redis

context with path [] threw exception [Request processing failed; nested exception is redis.clients.jedis.exceptions.JedisExhaustedPoolException: Could not get a resource since the pool is exhausted] with root cause

java.util.NoSuchElementException: Timeout waiting for idle object
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:444) ~[commons-pool2-2.8.0.jar:2.8.0]
	at org.apache.commons.pool2.impl.GenericObjectPool.borrowObject(GenericObjectPool.java:354) ~[commons-pool2-2.8.0.jar:2.8.0]
	at redis.clients.jedis.util.Pool.getResource(Pool.java:50) ~[jedis-3.3.0.jar:na]
	at redis.clients.jedis.JedisPool.getResource(JedisPool.java:288) ~[jedis-3.3.0.jar:na]
	at com.example.demo.redis.RedisService.get(RedisService.java:20) ~[classes/:na]
	at com.example.demo.controller.HelloController.redisGet(DemoController.java:69) ~[classes/:na]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_251]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_251]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_251]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_251]
	at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:879) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:793) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:634) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:741) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.7.RELEASE.jar:5.2.7.RELEASE]
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:373) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_251]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_251]
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.36.jar:9.0.36]
	at java.lang.Thread.run(Thread.java:748) [na:1.8.0_251]

原始代码：

spring.redis.port=6379
# Redis服务器连接密码
spring.redis.password=123456
# 连接超时时间（毫秒）
spring.redis.timeout=20000
# 连接池最大连接数（使用负值表示没有限制）
spring.redis.jedis.pool.max-active=5
# 连接池中的最大空闲连接

spring.redis.jedis.pool.max-idle=5
# 连接池中的最小空闲连接
spring.redis.jedis.pool.min-idle=3
# 连接池最大阻塞等待时间（使用负值表示没有限制）
spring.redis.jedis.pool.max-wait=5

package com.example.demo.redis;

import com.alibaba.fastjson.JSON;
import org.apache.ibatis.annotations.Insert;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Service;
import redis.clients.jedis.Jedis;
import redis.clients.jedis.JedisPool;
@Service

public class RedisService {
    @Autowired
    private JedisPool jedisPool;


    public T get(String key,Classclazz){
        Jedis jedis = null;
        try{
            jedis = jedisPool.getResource();
            String str = jedis.get(key);
            T t = sringtoBean(str,clazz);
            return  t;
        }finally {
            returnToPool(jedis);
        }


    }

    private  T sringtoBean(String str,Class clazz) {
        if(str == null|| str.length() <= 0||clazz == null) return  null;
        if(clazz == int.class ||clazz == Integer.class){
            return (T) Integer.valueOf(str);
        }else if(clazz == String.class){
            return (T)str;
        }else if(clazz == long.class || clazz == Long.class){
            return (T)Long.valueOf(str);
        }else {
            return JSON.toJavaObject(JSON.parseObject(str),clazz);
        }
        //还没有加list的方法

    }

    public  boolean exists(String key) {
        Jedis jedis = null;
        try {
            jedis = jedisPool.getResource();
            return jedis.exists(key);
        } finally {
            returnToPool(jedis);
        }
    }


    public boolean set(String key,T value){
        //JedisPool jp = null;
        Jedis jedis = null;
        try{
            jedis = jedisPool.getResource();
            String str = beanToString(value);
            jedis.set(key,str);
            return true;
        }finally {
            returnToPool(jedis);
        }
    }

    private void returnToPool(Jedis jedis) {
        if(jedis != null){
            jedis.close();
        }
    }



    private String beanToString(T value) {
        if(value == null) return null;
        Class clazz = value.getClass();
        if(clazz == int.class ||clazz == Integer.class){
            return ""+value;
        }else if(clazz == String.class){
            return (String) value;
        }else if(clazz == long.class || clazz == Long.class){
            return ""+value;
        }else {
            return JSON.toJSONString(value);

        }
    }
}

package com.example.demo.redis;

import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.context.annotation.Configuration;
import org.springframework.stereotype.Component;


@Component
@Configuration

@ConfigurationProperties(prefix = "spring.redis")
public class  RedisConfig {
    //@Value("${spring.redis.host}")
    private String host;

    //@Value("${spring.redis.port}")
    private int port;

   // @Value("${spring.redis.timeout}")
    private int timeout;

    //@Value("${spring.redis.password}")
    private String password;

    //@Value("${spring.redis.pool.max-active}")
    private int poolMaxTotal;

//    @Value("${spring.redis.pool.min-idle}")
//    private int poolminIdle;

    //@Value("${spring.redis.pool.max-idle}")
    private int poolMaxIdle;

    //@Value("${spring.redis.pool.max-wait}")
    private int poolMaxWait;

    public void setHost(String host) {
        this.host = host;
    }

    public void setPort(int port) {
        this.port = port;
    }

    public void setTimeout(int timeout) {
        this.timeout = timeout;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public void setPoolMaxTotal(int poolMaxTotal) {
        this.poolMaxTotal = poolMaxTotal;
    }

    public void setPoolMaxIdle(int poolMaxIdle) {
        this.poolMaxIdle = poolMaxIdle;
    }

    public void setPoolMaxWait(int poolMaxWait) {
        this.poolMaxWait = poolMaxWait;
    }

    public String getHost() {
        return host;
    }

    public int getPort() {
        return port;
    }

    public int getTimeout() {
        return timeout;
    }

    public String getPassword() {
        return password;
    }

    public int getPoolMaxTotal() {
        return poolMaxTotal;
    }

    public int getPoolMaxIdle() {
        return poolMaxIdle;
    }

    public int getPoolMaxWait() {
        return poolMaxWait;
    }
}

package com.example.demo.redis;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import redis.clients.jedis.JedisPool;
import redis.clients.jedis.JedisPoolConfig;


@Service

public class RedisFactory {
    @Autowired
    RedisConfig redisConfig;

    @Bean
    public JedisPool JedisFactory(){
        JedisPoolConfig poolConfig = new JedisPoolConfig();
//          poolConfig.setMaxTotal(60);
//          poolConfig.setMaxIdle(60);
//          poolConfig.setMinIdle(60);
//          poolConfig.setNumTestsPerEvictionRun(1024);
//          poolConfig.setTimeBetweenEvictionRunsMillis(30000);
//          poolConfig.setMinEvictableIdleTimeMillis(1800000);
//          poolConfig.setSoftMinEvictableIdleTimeMillis(1800000);
//          poolConfig.setMaxWaitMillis(500);
//          poolConfig.setTestOnBorrow(false);
//          poolConfig.setTestWhileIdle(true);
//          poolConfig.setBlockWhenExhausted(false);
//          JedisPool jp = new JedisPool(poolConfig,"192.168.0.123",6379,20000,"123456",0);
//        return jp;

       // JedisPoolConfig poolConfig = new JedisPoolConfig();
        poolConfig.setMaxTotal(redisConfig.getPoolMaxTotal());
        poolConfig.setMaxIdle(redisConfig.getPoolMaxIdle());
        poolConfig.setMaxWaitMillis(redisConfig.getPoolMaxWait() * 1000);
        return new JedisPool(poolConfig,redisConfig.getHost(),redisConfig.getPort(),redisConfig.getTimeout(),redisConfig.getPassword(),0,false);

//        poolConfig.setMaxIdle(redisConfig.getPoolMaxIdle());
//        poolConfig.setMaxTotal(redisConfig.getPoolMaxTotal());
//        poolConfig.setMaxWaitMillis(redisConfig.getPoolMaxWait());
//        poolConfig.setTestOnBorrow(false);
//          JedisPool jp = new JedisPool(poolConfig,"192.168.0.103",6379,20000,"123456",0);
//        return jp;

    }
}

DemoController中

  @Autowired
    RedisService redisService;
    @RequestMapping("/redis/get")
    @ResponseBody
    public Result redisGet(){
        Object op = redisService.get("k1",Object.class);
        return Result.success((String)op);

 

尝试方法：使用StringRedisTemplate template代替连接池，成功。说明配置文件没有写错。           

错误出现在代码 jedis = jedisPool.getResource();提示说为null，最后意识到配置文件中少写了一个参数max-total

ps:没写这个的原因是以为max-total和max-active一样的，只是版本改了改名成了max-active,然鹅发现是我天真了，注意2020年的redIs 默认是spring.redis.XXX，当时以为是配置信息写错了一直将reids.XXX和spring.redis.XXX之间改来改去，其实是不需要修改的，它可以自动识别（就像jdbc一样）。另外因为spring.redis.XXX是原因还修改

@ConfigurationProperties(prefix = "spring.redis")原先是

@ConfigurationProperties(prefix = "redis")

spring.redis.pool-max-total=10

 

最一开始报错发现有root cause的信息，以为是防火墙的问题，然鹅虚拟机上没有安装防火墙，虚拟机上对所有主机6379端口开放，用telnet可以连接，Idea中StringRedisTemplate template（）中也可以成功

还尝试了使用@value注解，无用（因为最关键的maxTotal没有写 ）。最终效果