项目场景：

错误关键描述如下:

Correct the classpath of your application so that it contains a single, compatible version of org.apache.commons.pool2.impl.GenericObjectPoolConfig

问题描述：

下面是错误的详细描述

2021-03-11 10:00:22.145 ERROR 10196 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 

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APPLICATION FAILED TO START
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Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    io.lettuce.core.support.CommonsPool2ConfigConverter.bounded(CommonsPool2ConfigConverter.java:49)

The following method did not exist:

    org.apache.commons.pool2.impl.GenericObjectPoolConfig.getTestOnCreate()Z

The 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-pool2/2.0/commons-pool2-2.0.jar!/org/apache/commons/pool2/impl/GenericObjectPoolConfig.class

The class hierarchy was loaded from the following locations:

    org.apache.commons.pool2.impl.GenericObjectPoolConfig: file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.0/commons-pool2-2.0.jar
    org.apache.commons.pool2.impl.BaseObjectPoolConfig: file:/C:/Users/Administrator/.m2/repository/org/apache/commons/commons-pool2/2.0/commons-pool2-2.0.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of org.apache.commons.pool2.impl.GenericObjectPoolConfig


Process finished with exit code 1

原因分析：

原因是jar版本冲突 ，如springboot starter parent与下面引用的某些启动器或者其他jar版本不一致，导致缓存了多个jar, 而启动时不知道选取哪个版本的jar导致错误

解决方案：

从下图可以看到启动器父版本和子启动器版本不一样,
去除commons-pool2的版本即可