Maven全新安装失败，连接超时:连接错误

Question

我在我的项目上尝试了maven的干净安装，每次我得到下面的错误

Maven版本2.2.1 JDK 1.7

​

F:\Wealth>"C:\Program Files\apache-maven-2.2.1\bin\mvn.bat" cl
ean install -U
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building polo
[INFO]    task-segment: [clean, install]
[INFO] ------------------------------------------------------------------------
Downloading: http://maven.apps.com/maven2/org/apache/maven/plugins/maven-cle
an-plugin/2.2/maven-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository nunki (http://maven.apps.com/maven2): Error transferring file: Connection timed out: connect
Downloading: http://maven.apps.com/maven/org.apache.maven.plugins/poms/maven
-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository nunki-legacy (http://maven.apps.com/maven): Error transferring file: Connection timed out: connect
Downloading: http://maven.apps.com/maven2//org/apache/maven/plugins/maven-clean-plugin/2.2/maven-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository central (http://repo1.maven.org/maven2): Error transferring file: Connection timed out: connect
Downloading: http://maven.apps.com/maven2/org/apache/maven/plugins/maven-cle
an-plugin/2.2/maven-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository nunki (http://maven.apps.com/maven2): Error transferring file: Connection timed out: connect
Downloading: http://maven.apps.com/maven/org.apache.maven.plugins/poms/maven
-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository nunki-legacy (http://maven.apps.com/maven): Error transferring file: Connection timed out: connect
Downloading: http://maven.apps.com/maven2//org/apache/maven/plugins/maven-cl
ean-plugin/2.2/maven-clean-plugin-2.2.pom
[WARNING] Unable to get resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' from repository central (http://repo1.maven.org/maven2): Error transferring file: Connection timed out: connect
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] Error building POM (may not be this project's POM).


Project ID: org.apache.maven.plugins:maven-clean-plugin

Reason: POM 'org.apache.maven.plugins:maven-clean-plugin' not found in repository: Unable to download the artifact from any repository

  org.apache.maven.plugins:maven-clean-plugin:pom:2.2

from the specified remote repositories:
  nunki-legacy (http://maven.apps.com/maven),
  central (http://maven.apps.com/maven2/),
  nunki (http://maven.apps.com/maven2)

 for project org.apache.maven.plugins:maven-clean-plugin

​

我检查了settings.xml中的代理设置，我的感觉是这就是问题所在。但是我已经尝试了相同的代理设置来构建其他开源软件项目，并且构建是成功的。但是对于这个项目，我看到了这个错误。

有人能就这个问题给出一个想法吗？

Answer 1

DependencyResolutionException

(来源：)

当Maven无法下载依赖项时，通常会出现此错误。导致此错误的可能原因是：

1. POM缺少托管工件的<repository>的声明。
2. 您配置的存储库需要身份验证，并且Maven无法向服务器提供正确的凭据。在这种情况下，请确保您的${user.home}/.m2/settings.xml包含一个<server>声明，其<id>与要使用的远程存储库的<id>相匹配。远程仓库使用SSL，运行Maven的JVM不信任server.
3. There的证书是一个普遍的网络问题，导致Maven无法访问任何远程仓库，例如，缺少代理configuration.
4. You配置Maven执行严格的校验和验证，下载的文件corrupted.
5. Maven无法将文件保存到本地仓库，请参阅Maven Settings Reference。更多细节参见LocalRepositoryNotAccessibleException。Maven3中的
6. 如果你刚刚有一个失败的下载，并且已经修复了它(例如，通过将jar上传到存储库)，它将缓存失败。要强制刷新，请在命令行中添加-U。

如果出现与网络相关的一般问题，您还可以参考以下文章：

• Configuring a Proxy
• Security and Deployment Settings
• Guide to Remote Repository Access through Authenticated HTTPS

Answer 2

您的远程存储库都有域maven.apps.com，这是您的intranet中的域吗？Nexus是否作为Maven central的镜像运行？

如果没有，您可以尝试临时删除settings.xml，并查看默认设置是否成功。

Answer 3

我遇到了这个问题，maven不能下载任何东西。经过一些谷歌搜索和一些运气，我删除了~/.m2/server.xml文件。这就解决了这个问题。我以前没碰过那个文件，不确定是什么问题。