Maven的问题:maven-干净插件在存储库中找不到。

Question

叹息.

使用maven 2.2.1，它突然无法解析maven-洁净插件。真的，一个构建工具需要一个插件才能“干净”，这有多疯狂呢？

我试着从另一台工作正常的机器同步我的.m2目录，我得到了相同的结果。

taproot:~/$ mvn clean package -DskipTests
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] Building CRM Webapp
[INFO]    task-segment: [clean, package]
[INFO] ------------------------------------------------------------------------
Downloading: http://download.java.net/maven/2/org/apache/maven/plugins/maven-clean-plugin/2.2/maven-clean-plugin-2.2.pom
[INFO] Unable to find resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' in repository maven.java.net (http://download.java.net/maven/2)
Downloading: http://repo1.maven.org/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): Specified destination directory cannot be created: /Users/armhold/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/2.2
Downloading: http://repository.jboss.org/nexus/content/groups/public-jboss//org/apache/maven/plugins/maven-clean-plugin/2.2/maven-clean-plugin-2.2.pom
[INFO] Unable to find resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' in repository public jboss (http://repository.jboss.org/nexus/content/groups/public-jboss/)
Downloading: https://repository.jboss.org/nexus/content/repositories/releases//org/apache/maven/plugins/maven-clean-plugin/2.2/maven-clean-plugin-2.2.pom
[INFO] Unable to find resource 'org.apache.maven.plugins:maven-clean-plugin:pom:2.2' in repository jboss-my-rel (https://repository.jboss.org/nexus/content/repositories/releases/)
Downloading: http://repository.jboss.org/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 JBOSS (http://repository.jboss.org/maven2/): Specified destination directory cannot be created: /Users/armhold/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/2.2
Downloading: http://repo1.maven.org/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): Specified destination directory cannot be created: /Users/armhold/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/2.2
[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:
  jboss-my-rel (https://repository.jboss.org/nexus/content/repositories/releases/),
  central (http://repo1.maven.org/maven2),
  maven.java.net (http://download.java.net/maven/2),
  JBOSS (http://repository.jboss.org/maven2/),
  public jboss (http://repository.jboss.org/nexus/content/groups/public-jboss/)

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

我的pom是这样的：

<repositories>
    <repository>
        <id>public jboss</id>
        <url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
    </repository>

    <repository>
        <id>jboss-my-rel</id>
        <url>https://repository.jboss.org/nexus/content/repositories/releases/</url>
    </repository>

    <repository>
        <id>JBOSS</id>
        <name>JBoss Repository</name>
        <url>http://repository.jboss.org/maven2/</url>
    </repository>

</repositories>

<pluginRepositories>
    <pluginRepository>
        <id>maven.java.net</id>
        <name>Java.net Maven2 Repository</name>
        <url>http://download.java.net/maven/2</url>
    </pluginRepository>
</pluginRepositories>

Answer 1

如果你仔细阅读你的错误，你可以在那里找到答案：

 Specified destination directory cannot be created:
 /Users/armhold/.m2/repository/org/apache/maven/plugins/maven-clean-plugin/2.2

您没有对该目录的写访问权限(或者运行maven进程的用户没有)

Answer 2

同时，我也面临着类似的问题。但是我发现这是代理设置，它用于我们的intranet，我没有将它放入Setting.xml中。放了之后，就变成了爆炸.

    <proxy>
        <id>ABC</id>
        <active>true</active>
        <protocol>http</protocol>
        <username>USER</username>
        <password>Password</password>
        <port>8080</port>
        <host>XXX.net</host>
        <nonProxyHosts>local.net,some.host.com</nonProxyHosts>
    </proxy>

Answer 3

我的猜测是，您有一个配置或网络问题，正在阻止maven访问网络。