在Quarkus本机中运行的JAX-RS应用程序中使用Jedis池会导致ClassNotFoundException:org.apache.commons.pool2.impl.DefaultEvictionPolicy

问题描述

我试图在以Quarkus纯模式运行的应用程序中使用JedisPool(在JVM模式下可以正常工作).
我已经禁用了池的JMX功能，该功能在纯模式下不可用，例如:

I'm trying to use JedisPool in application run in Quarkus native mode (works fine in JVM mode).
I've already disabled JMX feature of the pool, which is not avaliable in native mode, like this:

  JedisPoolConfig jedisConfiguration = new JedisPoolConfig();
  jedisConfiguration.setJmxEnabled(false);
  jedisPool = new JedisPool(jedisConfiguration, jedisURI);

但是我遇到以下错误:

2020-04-29 17:35:37,724 INFO  [test.StockQuote] (main) java.lang.IllegalArgumentException: Unable to create org.apache.commons.pool2.impl.EvictionPolicy instance of type org.apache.commons.pool2.impl.DefaultEvictionPolicy
    at org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(BaseGenericObjectPool.java:662)
    at org.apache.commons.pool2.impl.BaseGenericObjectPool.setEvictionPolicyClassName(BaseGenericObjectPool.java:687)
    at org.apache.commons.pool2.impl.BaseGenericObjectPool.setConfig(BaseGenericObjectPool.java:235)
    at org.apache.commons.pool2.impl.GenericObjectPool.setConfig(GenericObjectPool.java:302)
    at org.apache.commons.pool2.impl.GenericObjectPool.<init>(GenericObjectPool.java:115)
    at redis.clients.jedis.util.Pool.initPool(Pool.java:45)
    ...
 Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.DefaultEvictionPolicy
    at com.oracle.svm.core.hub.ClassForNameSupport.forName(ClassForNameSupport.java:60)
    at java.lang.Class.forName(DynamicHub.java:1197)

作为一个临时解决方案，我切换为创建直接连接而不是使用池，但仍在寻找使用池的可能性.

as a temporary solution, I switched to create direct connection instead of using pool, but still looking for possibility of using pool.

有什么建议或解决方法吗?

Any suggestions or workarounds?

推荐答案

好吧，我进一步挖掘了一下，并在以下页面上找到了有关Class.forName的更多信息:对基板VM的思考和 Quarkus-编写本机应用程序的提示并通过包含以下内容的reflection-config.json文件找到了解决方案:

Ok, I dug a little more and found this more info about Class.forName on these pages: Reflection on Substrate VM and Quarkus - Tips for writing native applicationsand found a solution via reflection-config.json file which contains:

[
  {
    "name" : "org.apache.commons.pool2.impl.DefaultEvictionPolicy",
    "allDeclaredConstructors" : true,
    "allPublicConstructors" : true,
    "allDeclaredMethods" : true,
    "allPublicMethods" : true,
    "allDeclaredFields" : true,
    "allPublicFields" : true
  }
]

您还需要在application.properties文件中添加以下行:

You need also add following line to your application.properties file:

quarkus.native.additional-build-args =-H:ReflectionConfigurationFiles=reflection-config.json

然后我的应用程序成功运行.

Then my application runs successfully.

这篇关于在Quarkus本机中运行的JAX-RS应用程序中使用Jedis池会导致ClassNotFoundException:org.apache.commons.pool2.impl.DefaultEvictionPolicy的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！