Nexus未缓存Maven Central插件 [英] Nexus is not caching maven central plugins

问题描述

我使用Maven 3.0.4和Nexus 2.0.6.我已经将我的settings.xml设置为Nexus指令说明，以使用单个存储库. 当maven尝试运行maven -U clean时，出现以下错误.

Im using Maven 3.0.4 and Nexus 2.0.6. I have set up my settings.xml as the Nexus instruction show for using a single repository. I get the error below when maven tries to run maven -U clean.

[ERROR] Plugin org.apache.maven.plugins:maven-clean-plugin:2.4.1 or one of its d
ependencies could not be resolved: Failed to read artifact descriptor for org.ap
ache.maven.plugins:maven-clean-plugin:jar:2.4.1: Could not find artifact org.apa
che.maven.plugins:maven-clean-plugin:pom:2.4.1 in nexus (http://localhost:8081/n
exus/content/groups/public) -> [Help 1]

如果我从设置中删除了连接镜，然后直接转到maven Central，该命令将起作用. nexus中的Maven回购设置显示它正在使用中，并且位于公共组中(其最后列出).

If I remove the nexus mirror from the settings and go directly to maven central the command works. The settings for the maven repo in nexus show that it is in service and it is in the public group (its listed last).

我没有代理访问互联网.

I am not behind a proxy to access the internet.

这是我的settings.xml

Here is my settings.xml

<?xml version="1.0" encoding="UTF-8"?>
<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0"
      xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
      xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0 http://maven.apache.org/xsd/settings-1.0.0.xsd">
<offline>false</offline>
<mirrors>
    <mirror>
        <!--This sends everything else to /public -->
        <id>nexus</id>
        <mirrorOf>*</mirrorOf>
        <url>http://localhost:8081/nexus/content/groups/public</url>
    </mirror>
</mirrors>
<profiles>
    <profile>
        <id>nexus</id>
        <!--Enable snapshots for the built in central repo to direct -->
        <!--all requests to nexus via the mirror -->
        <repositories>
            <repository>
                <id>central</id>
                <url>http://central</url>
                <releases><enabled>true</enabled></releases>
                <snapshots><enabled>true</enabled></snapshots>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>central</id>
                <url>http://central</url>
                <releases><enabled>true</enabled></releases>
                <snapshots><enabled>true</enabled></snapshots>
            </pluginRepository>
        </pluginRepositories>
    </profile>
    <profile>
        <id>maven-central</id>
        <!--Enable snapshots for the built in central repo to direct -->
        <!--all requests to nexus via the mirror -->
        <repositories>
            <repository>
                <id>central</id>
                <url>http://repo1.maven.org/maven2/</url>
                <releases><enabled>true</enabled></releases>
                <snapshots><enabled>true</enabled></snapshots>
            </repository>
        </repositories>
        <pluginRepositories>
            <pluginRepository>
                <id>central</id>
                <url>http://repo1.maven.org/maven2/</url>
                <releases><enabled>true</enabled></releases>
                <snapshots><enabled>true</enabled></snapshots>
            </pluginRepository>
        </pluginRepositories>
     </profile>
</profiles>
    <activeProfiles>
    <!--make the profile active all the time -->
    <activeProfile>nexus</activeProfile>
</activeProfiles>


</settings>

推荐答案

确保正确配置了Central代理存储库，并且代理的URL为http://repo1.maven.org/maven2/.检查您是否可以在存储库的URL看到缓存的工件，应该为http://localhost:8081/nexus/content/repositories/central/org/apache/maven/plugins/maven-clean-plugin/2.4.0/maven-clean-plugin-2.4.1.pom.

Make sure the Central proxy repository is properly configured, and the proxied URL is http://repo1.maven.org/maven2/. Check that you can see cached artifacts at the repository's URL, should be http://localhost:8081/nexus/content/repositories/central/org/apache/maven/plugins/maven-clean-plugin/2.4.0/maven-clean-plugin-2.4.1.pom.

确保您完全具有中央代理，http://localhost:8081/nexus/content/repositories/central/中是否列出了任何内容.

Make sure you have a Central proxy at all, is there anything listed at http://localhost:8081/nexus/content/repositories/central/.

如果您位于代理后面，则可以在管理-> Nexus 窗格的默认HTTP代理设置(可选)部分下配置代理.

If you're behind a proxy, you can configure the proxy under the Default HTTP Proxy Settings (optional) section in the Administration->Nexus pane.

然后，确保将Public Repositories组存储库配置为将Central存储库包括在其包含的存储库列表中.

Then, make sure the Public Repositories group repository is configured to include the Central repository in its list of included repositories.

如果到目前为止一切正常，请检查日志，也许那里有一条有用的消息.

If everything looks fine so far, check the logs, maybe there's a helpful message in there.

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