Spotify/missinglink 插件错误：具有相同键的多个条目：org.apache.logging.log4j.core.util.SystemClock = DeclaredClass答案

【问题标题】：Spotify/missinglink plugin error: Multiple entries with same key: org.apache.logging.log4j.core.util.SystemClock = DeclaredClassSpotify/missinglink 插件错误：具有相同键的多个条目：org.apache.logging.log4j.core.util.SystemClock = DeclaredClass
【发布时间】：2022-01-24 14:29:11
【问题描述】：

几天前我遇到了一个问题，我在 StackOverflow 中记录了解决方案。我希望将它用于其他人。

我正在处理的 maven 项目（java 版本：8）包含 spotify/misinglink 插件，用于检测来自传递依赖的问题。增加库的版本后，我在运行 mvn clean install 时遇到了问题。

以下是简化的pom.xml 文件：

<project...
  <build>
    <plugins>
      <plugin>
        <groupId>com.spotify</groupId>
        <artifactId>missinglink-maven-plugin</artifactId>
        <version>0.1.1</version>>
      <plugin>
    </plugins>
  </build>
 <dependencies>
...
  </dependencies>
</project>

更新 log4j 库并运行 mvn clean install 命令后，我收到以下错误：

Multiple entries with same key: org.apache.logging.log4j.core.util.SystemClock=DeclaredClass{className=org.apache.logging.log4j.core.util.SystemClock, parents=[org.apache.logging.log4j.core.util.Clock, java.lang.Object], methods={MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}=DeclaredMethod{descriptor=MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}, methodCalls=[CalledMethod{owner=java.lang.Object, descriptor=MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}, lineNumber=22}], fieldAccesses=[]}, MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}=DeclaredMethod{descriptor=MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}, methodCalls=[CalledMethod{owner=java.lang.System, descriptor=MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}, lineNumber=30}], fieldAccesses=[]}}, fields=[]} and org.apache.logging.log4j.core.util.SystemClock=DeclaredClass{className=org.apache.logging.log4j.core.util.SystemClock, parents=[org.apache.logging.log4j.core.time.PreciseClock, org.apache.logging.log4j.core.util.Clock, java.lang.Object], methods={MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}=DeclaredMethod{descriptor=MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}, methodCalls=[CalledMethod{owner=java.lang.Object, descriptor=MethodDescriptor{returnType=void, name=<init>, parameterTypes=[]}, lineNumber=28}], fieldAccesses=[]}, MethodDescriptor{returnType=void, name=init, parameterTypes=[org.apache.logging.log4j.core.time.MutableInstant]}=DeclaredMethod{descriptor=MethodDescriptor{returnType=void, name=init, parameterTypes=[org.apache.logging.log4j.core.time.MutableInstant]}, methodCalls=[CalledMethod{owner=java.time.Clock, descriptor=MethodDescriptor{returnType=java.time.Clock, name=systemUTC, parameterTypes=[]}, lineNumber=44}, CalledMethod{owner=java.time.Instant, descriptor=MethodDescriptor{returnType=int, name=getNano, parameterTypes=[]}, lineNumber=45}, CalledMethod{owner=java.time.Clock, descriptor=MethodDescriptor{returnType=java.time.Instant, name=instant, parameterTypes=[]}, lineNumber=44}, CalledMethod{owner=org.apache.logging.log4j.core.time.MutableInstant, descriptor=MethodDescriptor{returnType=void, name=initFromEpochSecond, parameterTypes=[long, int]}, lineNumber=45}, CalledMethod{owner=java.time.Instant, descriptor=MethodDescriptor{returnType=long, name=getEpochSecond, parameterTypes=[]}, lineNumber=45}], fieldAccesses=[]}, MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}=DeclaredMethod{descriptor=MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}, methodCalls=[CalledMethod{owner=java.lang.System, descriptor=MethodDescriptor{returnType=long, name=currentTimeMillis, parameterTypes=[]}, lineNumber=36}], fieldAccesses=[]}}, fields=[]}

错误非常不清楚，我不知道是什么导致了这种行为。我也在 github Link 上评论了这个问题。

【问题讨论】：

标签： java maven

【解决方案1】：

我通过修改缺少的链接插件解决了这个问题，如下所示：

  <build>
    <plugins>
      <plugin>
        <groupId>com.spotify</groupId>
        <artifactId>missinglink-maven-plugin</artifactId>
        <version>0.1.1</version>
        <executions>
          <execution>
            <phase>none</phase>
          </execution>
        </executions>
      </plugin>
      <plugin>
        <groupId>org.apache.felix</groupId>
        <artifactId>maven-bundle-plugin</artifactId>
        <extensions>true</extensions>
      </plugin>
    </plugins>

【讨论】：