遇到Maven 3在尝试下载依赖时因网络问题而标记依赖不可用，并阻止后续构建命令执行的问题？只需运行带有-U选项的命令即可解决。即使描述适用于快照版本，似乎在遇到发布版本时也能修复错误。
[url]http://blog.mycila.com/2010/09/maven-3-resolution-will-not-be.html[/url]
[quote]
This is often a false positive. Imagine you have a connection issue lasting only 5 seconds when Maven 3 tries to download a dependency, it will mark this dependency as unavailable for a delay. And thus will prevent you from replaying the build command even if the network issue is fixed.
Just run the command with the -U option. Even if its description applies to snapshots, it seems to also fix the error if it occurred on a release.
Example: mvn -U clean package
[/quote]
[quote]
This is often a false positive. Imagine you have a connection issue lasting only 5 seconds when Maven 3 tries to download a dependency, it will mark this dependency as unavailable for a delay. And thus will prevent you from replaying the build command even if the network issue is fixed.
Just run the command with the -U option. Even if its description applies to snapshots, it seems to also fix the error if it occurred on a release.
Example: mvn -U clean package
[/quote]
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