Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig

SpringBoot添加redis坐标启动报错，目前最新版坐标如下：

<!-- springboot集成redis -->
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-redis</artifactId>
    <version>2.2.5.RELEASE</version>
</dependency>

控制台报错如下：

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled.
2020-03-16 15:24:54.481 ERROR 9351 --- [           main] o.s.boot.SpringApplication               : Application run failed
Caused by: org.springframework.beans.BeanInstantiationException: Failed to instantiate [org.springframework.data.redis.connection.lettuce.LettuceConnectionFactory]: Factory method 'redisConnectionFactory' threw exception; nested exception is java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:185) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	at org.springframework.beans.factory.support.ConstructorResolver.instantiate(ConstructorResolver.java:651) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	... 59 common frames omitted
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
	at org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration$LettucePoolingClientConfigurationBuilder.<init>(LettucePoolingClientConfiguration.java:94) ~[spring-data-redis-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.data.redis.connection.lettuce.LettucePoolingClientConfiguration.builder(LettucePoolingClientConfiguration.java:51) ~[spring-data-redis-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration$PoolBuilderFactory.createBuilder(LettuceConnectionConfiguration.java:136) ~[spring-boot-autoconfigure-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.createBuilder(LettuceConnectionConfiguration.java:100) ~[spring-boot-autoconfigure-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.getLettuceClientConfiguration(LettuceConnectionConfiguration.java:86) ~[spring-boot-autoconfigure-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at org.springframework.boot.autoconfigure.data.redis.LettuceConnectionConfiguration.redisConnectionFactory(LettuceConnectionConfiguration.java:68) ~[spring-boot-autoconfigure-2.2.5.RELEASE.jar:2.2.5.RELEASE]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_241]
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_241]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_241]
	at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_241]
	at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:154) ~[spring-beans-5.2.4.RELEASE.jar:5.2.4.RELEASE]
	... 60 common frames omitted
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig
	at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_241]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_241]
	at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355) ~[na:1.8.0_241]
	at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_241]
	... 71 common frames omitted

解决办法：

导入最新的commons-pool2坐标

<dependency>
    <groupId>org.apache.commons</groupId>
    <artifactId>commons-pool2</artifactId>
    <version>2.8.0</version>
</dependency>

最后

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