Maven快照版本未从Nexus加载

Question

我们有一个Sonatype Nexus在我们的环境中运行，它配置了另一个Nexus作为代理存储库。当我们消耗我们的依赖时，我们向我们的关系索取它们。直到昨天我在我们的项目中添加了一个新的依赖项。

Maven似乎没有正确解析部署的快照版本。在maven日志中，我可以看到它正在下载maven-metadata.xml，但是当它试图下载包含二进制文件的zip文件时，它没有用当前的快照版本替换-snapshot

> mvn -f My.Product.dependencies.xml process-resources -DConfiguration=AnyConfig -U -X

[DEBUG] Could not find metadata com.company.team:My.New.Dependency:2.2-SNAPSHOT/maven-metadata.xml in local (d:\Maven\repositories)
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://buildserver:8082/nexus/content/groups/company
Downloading: http://buildserver:8082/nexus/content/groups/company/com/company/team/My.New.Dependency/2.2-SNAPSHOT/maven-metadata.xml
Downloaded: http://buildserver:8082/nexus/content/groups/company/com/company/team/My.New.Dependency/2.2-SNAPSHOT/maven-metadata.xml (850 B at 13.2 KB/sec)
[DEBUG] Reading resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\resolver-status.properties
[DEBUG] Writing resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\resolver-status.properties
[DEBUG] Could not find metadata com.company.team:My.New.Dependency:2.2-SNAPSHOT/maven-metadata.xml in local (d:\Maven\repositories)
[DEBUG] Using connector WagonRepositoryConnector with priority 0 for http://buildserver:8082/nexus/content/groups/company
Downloading: http://buildserver:8082/nexus/content/groups/company/com/company/team/My.New.Dependency/2.2-SNAPSHOT/maven-metadata.xml
Downloaded: http://buildserver:8082/nexus/content/groups/company/com/company/team/My.New.Dependency/2.2-SNAPSHOT/maven-metadata.xml (850 B at 55.3 KB/sec)
[DEBUG] Reading resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\resolver-status.properties
[DEBUG] Writing resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\resolver-status.properties
...
Downloading: http://buildserver:8082/nexus/content/groups/company/com/company/team/My.New.Dependency/2.2-SNAPSHOT/My.New.Dependency-2.2-SNAPSHOT-vs2010-40-AnyCpu-Release.zip
[DEBUG] Reading resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\My.New.Dependency-2.2-SNAPSHOT-vs2010-40-AnyCpu-Release.zip.lastUpdated
[DEBUG] Writing resolution tracking file d:\Maven\repositories\com\company\team\My.New.Dependency\2.2-SNAPSHOT\My.New.Dependency-2.2-SNAPSHOT-vs2010-40-AnyCpu-Release.zip.lastUpdated
[INFO] ------------------------------------------------------------------------
...
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO]
[INFO] My.Client.App  FAILURE [1.922s]
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 3.687s
[INFO] Finished at: Thu Oct 13 09:54:24 CEST 2016
[INFO] Final Memory: 9M/177M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project My.Client.App: Could not resolve dependencies for project com.company.team2:My.Client.App:pom:7.0-SNAPSHOT: The following artifacts could not be resolved: com.company.team:My.New.Dependency:zip:vs2010-40-AnyCpu-Release:2.2-SNAPSHOT: Could not find artifact com.company.team:My.New.Dependency:zip:vs2010-40-AnyCpu-Release:2.2-SNAPSHOT in company (http://buildserver:8082/nexus/content/groups/company) -> [Help 1]

maven-metadata.xml正确地包含快照版本信息：

<?xml version="1.0" encoding="UTF-8"?>
<metadata modelVersion="1.1.0">
  <groupId>com.company.team</groupId>
  <artifactId>My.New.Dependency</artifactId>
  <version>2.2-SNAPSHOT</version>
  <versioning>
    <snapshot>
      <timestamp>20161011.235855</timestamp>
      <buildNumber>102</buildNumber>
    </snapshot>
    <lastUpdated>20161011235855</lastUpdated>
    <snapshotVersions>
      <snapshotVersion>
        <extension>pom</extension>
        <value>2.2-20161011.235855-102</value>
        <updated>20161011235855</updated>
      </snapshotVersion>
      <snapshotVersion>
        <classifier>vs2010-40-AnyCPU-Release</classifier>
        <extension>zip</extension>
        <value>2.2-20161011.235855-102</value>
        <updated>20161011235855</updated>
      </snapshotVersion>
    </snapshotVersions>
  </versioning>
</metadata>

当我检查下载资料的文件夹的目录列表时，2.2-20161011.235855-102版本就在那里：

来自同一存储库的所有其他依赖项都工作得非常好，只是新引入的依赖项没有下载。Maven没有像对所有其他依赖项那样用实际的快照版本号替换-snapshot,这让我抓狂。我还尝试了Nexus UI中的“过期缓存”和“更新索引”选项，但没有帮助。是什么原因导致Maven从实际版本号回落到-快照？也没有日志条目可以解释这一点。

Answer 1

在尝试了100万件事情并将其他依赖项的配置与新的依赖项进行了比较之后，我终于发现了问题：工件ID（分类器）是区分大小写的。在我的客户端POM文件中，我引用的是vs2010-40-anycpu-release，但部署的是vs2010-40-anycpu-release（注意大写AnyCPU)。

在日志文件中，您可以看到它试图下载一个带有小写anycpu的文件。我把它改成大写后，它起作用了。