背景
公司的一个项目由于HTTPS证书到期，导致小程序、POS不能正常使用。所以百度了下，通过URL检测证书有效期的代码，并自行整合到一个服务中。
代码仓库：[基于SpringBoot + 企业微信 + 钉钉 的通知服务] (https://gitee.com/tec-cloud/tec-notice)，由于码云的仓库策略调整，可能无法正常访问。
问题溯源
spring:
redis:
client-type: lettuce
host: 127.0.0.1
lettuce:
pool:
#最大连接数
max-active: 10
#连接池中最小空闲连接
min-idle: 2
#连接池中最大空闲连接
max-idle: 3
#最大建立连接等待时间。如果超过此时间将接到异常。设为-1表示无限制。
max-wait: 60s
#空闲链接检测线程检测周期毫秒（负值表示不检测）(类型为Duration，添加秒)
time-between-eviction-runs: 60s
#关闭超时时间
shutdown-timeout: 1s
port: 6379
password:
#连接超时时间毫秒(类型为Duration，添加秒)
timeout: 60s
以上是redis的配置，想将配置存储在redis中，所以通过lettuce集成spring-boot-starter-data-redis。
根据依赖传递 spring-boot-starter-data-redis v2.7.0 –> lettuce-core v6.1.8.RELEASE –> commons-pool2 v2.9.0定位到依赖配置，如下：
org.apache.commons
commons-pool2
2.9.0
compile
true
同时，我注意到 optional=true，所以在项目根pom.xml添加本依赖，并移除optional。如下：
org.apache.commons
commons-pool2
2.9.0
compile
启动后，报错：
2022-06-12 16:32:17.716 ERROR 15092 --- [ main] o.s.b.d.LoggingFailureAnalysisReporter :
***************************
APPLICATION FAILED TO START
***************************
Description:
An attempt was made to call a method that does not exist. The attempt was made from the following location:
org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory.getPoolConfig(LettuceConnectionConfiguration.java:185)
The following method did not exist:
org.apache.commons.pool2.impl.GenericObjectPoolConfig.setTimeBetweenEvictionRuns(Ljava/time/Duration;)V
The calling method's class, org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory, was loaded from the following location:
jar:file:/C:/Users/Administrator/.m2/repository/org/springframework/boot/spring-boot-autoconfigure/2.7.0/spring-boot-autoconfigure-2.7.0.jar!/org/springframework/boot/autoconfigure/data/redis/LettuceConnectionConfiguration$PoolBuilderFactory.class
The called method's class, org.apache.commons.pool2.impl.GenericObjectPoolConfig, is available from the following locations:
jar:file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.9.0/commons-pool2-2.9.0.jar!/org/apache/commons/pool2/impl/GenericObjectPoolConfig.class
The called method's class hierarchy was loaded from the following locations:
org.apache.commons.pool2.impl.GenericObjectPoolConfig: file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.9.0/commons-pool2-2.9.0.jar
org.apache.commons.pool2.impl.BaseObjectPoolConfig: file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.9.0/commons-pool2-2.9.0.jar
org.apache.commons.pool2.BaseObject: file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.9.0/commons-pool2-2.9.0.jar
Action:
Correct the classpath of your application so that it contains compatible versions of the classes org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory and org.apache.commons.pool2.impl.GenericObjectPoolConfig
Disconnected from the target VM, address: '127.0.0.1:51044', transport: 'socket'
Process finished with exit code 1
根据日志，确认错误：不存在GenericObjectPoolConfig.setTimeBetweenEvictionRuns方法，启动发生错误，终止并退出。
本着周末不学习就是退步的想法，跟踪了 https://github.com/apache/commons-pool.git和 https://github.com/spring-projects/spring-boot.git对应的版本、TAG及commit history。仅在spring-boot的提交记录中发现一点端倪。
如图：
不过提交时间是在spring-boot v2.7.x的初始化发布日期2022-05-19之前，参考：https://spring.io/projects/spring-boot#support。
最终只要带着这个困惑，翻阅spring-boot、spring-data-redis的closed的Issue，结果被我搜个正着。
https://github.com/spring-projects/spring-data-redis/issues?q=is%3Aissue+is%3Aclosed+GenericObjectPoolConfig
根据其中的讨论，得到有效信息，依赖版本有冲突，删掉了2.9.0： The problem solved by deleting explicit dependency org.apache.commons:commons-pool2:2.9.0. Now it uses commpons-pool2:2.11.1。
见链接：
https://github.com/spring-projects/spring-data-redis/issues/2293#issuecomment-1084310766
马不停蹄地开始试验：
org.apache.commons
commons-pool2
服务正常启动了。
解决方案
版本由spring-boot-dependencies来控制，直接读取即可。当然也可以使用${commons-pool2.version}来明确定义版本。
org.apache.commons
commons-pool2
Original: https://www.cnblogs.com/Candies/p/16368312.html
Author: Candyメ奶糖
Title: 【原创】SpringBoot 2.7.0通过lettuce及commons-pool2 v2.9.0集成Redis踩坑记录
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