Nexus找不到Maven Central中的工件

Question

我有一个带有组类型存储库的Nexus服务器，其中包含Maven Center。我可以在Maven Center[1]中看到org.codehaus.mojo:cobertura-maven-plugin:2.5.1工件（包括pom和jar)，但是当我试图使用Maven下载这个工件时，它说：

Downloading: https://example.com/nexus/content/groups/all/org/codehaus/mojo/cobertura-maven-plugin/2.5.1/cobertura-maven-plugin-2.5.1.pom
[WARNING] The POM for org.codehaus.mojo:cobertura-maven-plugin:jar:2.5.1 is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 14.523s
[INFO] Finished at: Wed May 16 16:31:24 EEST 2012
[INFO] Final Memory: 18M/219M
[INFO] ------------------------------------------------------------------------
[INFO] [16:31:24.647] Execute org.codehaus.mojo:cobertura-maven-plugin:2.5.1:cobertura done: 3978 ms
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] example project 1 ................................. FAILURE [10.077s]
[INFO] example project 2 ................................. SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 14.804s
[INFO] Finished at: Wed May 16 16:31:24 EEST 2012
[INFO] Final Memory: 17M/218M
[INFO] ------------------------------------------------------------------------
[ERROR] Plugin org.codehaus.mojo:cobertura-maven-plugin:2.5.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.codehaus.mojo:cobertura-maven-plugin:jar:2.5.1: Could not find artifact org.codehaus.mojo:cobertura-maven-plugin:pom:2.5.1 in example.com (https://example.com/nexus/content/groups/all) -> [Help 1]
[ERROR] Failed to execute goal org.codehaus.mojo:sonar-maven-plugin:2.0:sonar (default-cli) on project example project 1: Can not execute Sonar: Unable to execute maven plugin: Exception during execution of org.codehaus.mojo:cobertura-maven-plugin:2.5.1:cobertura -> [Help 2]

你知道为什么它不能下载工件吗？

UPD：是的，我在settings.xml中设置了镜像，是的，存储库是“在服务中”，只使用反向代理。

Answer 1

必须使settings.xml指向您定义的“all”组。此外，您必须覆盖存储库和pluginRepository的“central”（参见http://www.sonatype.com/books/nexus-book/reference/maven-sect-single-group.html)，并确保central是所有组的一部分。

一旦这一切都很好，请再次尝试您的项目，强制使用-u进行更新。

mvn -U clean install