java - apache在创建JedisConfig对象时在运行时公共(public)ClassNotFoundException

Question

我正在为minecraft spigot 1.14.2构建一个插件，它可以访问redis缓存。我正在使用绝地武士客户端访问缓存。
每当我试图创建JedisPool时，都会发生以下错误：

[00:26:09] [Server thread/ERROR]: Could not load 'plugins/test.jar' in folder 'plugins'
org.bukkit.plugin.InvalidPluginException: java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:139) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.plugin.SimplePluginManager.loadPlugin(SimplePluginManager.java:334) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.plugin.SimplePluginManager.loadPlugins(SimplePluginManager.java:253) [spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.craftbukkit.v1_14_R1.CraftServer.loadPlugins(CraftServer.java:350) [spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at net.minecraft.server.v1_14_R1.DedicatedServer.init(DedicatedServer.java:202) [spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at net.minecraft.server.v1_14_R1.MinecraftServer.run(MinecraftServer.java:775) [spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at java.lang.Thread.run(Thread.java:834) [?:?]
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/pool2/impl/GenericObjectPoolConfig
    at java.lang.Class.forName0(Native Method) ~[?:?]
    at java.lang.Class.forName(Class.java:398) ~[?:?]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:59) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    ... 6 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.pool2.impl.GenericObjectPoolConfig
    at java.net.URLClassLoader.findClass(URLClassLoader.java:471) ~[?:?]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:135) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.plugin.java.PluginClassLoader.findClass(PluginClassLoader.java:81) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:588) ~[?:?]
    at java.lang.ClassLoader.loadClass(ClassLoader.java:521) ~[?:?]
    at java.lang.Class.forName0(Native Method) ~[?:?]
    at java.lang.Class.forName(Class.java:398) ~[?:?]
    at org.bukkit.plugin.java.PluginClassLoader.<init>(PluginClassLoader.java:59) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    at org.bukkit.plugin.java.JavaPluginLoader.loadPlugin(JavaPluginLoader.java:135) ~[spigot-1.14.4.jar:git-Spigot-798ea6a-b2bcde8]
    ... 6 more

我的 Test.java：

package pkg;

import redis.clients.jedis.*;

import org.bukkit.plugin.java.JavaPlugin;

public class Test extends JavaPlugin{

    @Override
    public void onEnable(){
        JedisPool cachePool = new JedisPool(new JedisPoolConfig(), "127.0.0.1", 6379);
        try (Jedis j = cachePool.getResource() ) {
            j.set("foo", "bar");
        }
        cachePool.close();
    }

    @Override
    public void onDisable(){}
}

因为这看起来像一个依赖性问题，我还将在这里包括我的 build.gradle：

apply plugin:'java'

sourceCompatibility = '1.11'
targetCompatibility = '1.11'

repositories {
    mavenCentral()

    maven {
        url 'https://oss.sonatype.org/content/repositories/snapshots'
    }

    maven {
        url "https://hub.spigotmc.org/nexus/content/repositories/snapshots"
    }
}

dependencies {
    compile "redis.clients:jedis:3.1.0"
    compile "org.spigotmc:spigot-api:1.14.2-R0.1-SNAPSHOT"
}

processResources {
    from "src/plugin.yml"
}

这发生在新安装的插口服务器上。此外，这个问题仅限于在插件中创建 JedisPool的实例。我可以编写一个外部项目，这个项目没有spiget作为依赖项，创建一个 JedisPool很好。是什么导致了这个问题？如果还有什么我可以提供的信息，请告诉我。

Answer 1

在依赖项中添加Apache Commons Pool。
例如。

dependencies {
    compile "redis.clients:jedis:3.1.0"
    compile "org.apache.commons:commons-pool2:2.6.2"
    compile "org.spigotmc:spigot-api:1.14.2-R0.1-SNAPSHOT"
}