Java Maven Central的ehcache依赖项存在问题

我正在尝试在一台新笔记本电脑上构建一个项目，该笔记本电脑的.m2/repository目录为空。我得到以下错误：

BUILD FAILED
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:635: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1437: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1372: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1315: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1318: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1375: The following error occurred while executing this line:
/home/awills/Dropbox/Jasig/portal/uPortal/build.xml:1227: Unable to resolve artifact: Unable to get dependency information: Unable to read the metadata file for artifact 'net.sf.ehcache:ehcache-web:jar': Cannot find parent: net.sf.ehcache:ehcache-web-parent for project: null:ehcache-web:jar:null for project null:ehcache-web:jar:null
  net.sf.ehcache:ehcache-web:jar:2.0.4

from the specified remote repositories:
  central (http://repo1.maven.org/maven2),
  sonatype-nexus-snapshots (https://oss.sonatype.org/content/repositories/snapshots),
  apache-snapshots (http://repository.apache.org/snapshots)

Path to dependency: 
    1) org.jasig.portal:uportal-war:war:4.1.0-SNAPSHOT
    2) org.jasig.resourceserver:resource-server-utils:jar:1.0.38

该项目已经成熟，这种依赖关系最近没有改变。该构建最近正在运行

我不理解project:null:ehcache web:jar:null的

部分——它从哪里得到null

net.sf.ehcache:ehcache web:2.0.4 pom的开头如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>net.sf.ehcache</groupId>
    <artifactId>ehcache-web-parent</artifactId>
    <version>2.0.4</version>
  </parent>
  <name>Ehcache Web Filters</name>
  <artifactId>ehcache-web</artifactId>
  <packaging>jar</packaging>
  <description><![CDATA[Web caching filters.]]> </description>

  <licenses>
    <license>
      <name>The Apache Software License, Version 2.0</name>
      <url>http://ehcache.org/license.html</url>
    </license>
  </licenses>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <properties>
        <forgeTags>Integration Module</forgeTags>
        <Bundle-RequiredExecutionEnvironment>J2SE-1.5</Bundle-RequiredExecutionEnvironment>
    </properties>

    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>net.sf.ehcache</groupId>
        <artifactId>ehcache-parent</artifactId>
        <version>2.3</version>
    </parent>
    <name>Ehcache Web Filters Parent</name>
    <artifactId>ehcache-web-parent</artifactId>
    <packaging>pom</packaging>
    <version>2.0.4</version>
    <description>parent pom for web module</description>


4.0.0
net.sf.ehcache
ehcache web父对象
2.0.4
Ehcache网络过滤器
ehcache网络
罐子
Apache软件许可证，版本2.0
http://ehcache.org/license.html

而net.sf.ehcache:ehcache-web-parent:2.0.4 pom的开头如下

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <parent>
    <groupId>net.sf.ehcache</groupId>
    <artifactId>ehcache-web-parent</artifactId>
    <version>2.0.4</version>
  </parent>
  <name>Ehcache Web Filters</name>
  <artifactId>ehcache-web</artifactId>
  <packaging>jar</packaging>
  <description><![CDATA[Web caching filters.]]> </description>

  <licenses>
    <license>
      <name>The Apache Software License, Version 2.0</name>
      <url>http://ehcache.org/license.html</url>
    </license>
  </licenses>

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
    <properties>
        <forgeTags>Integration Module</forgeTags>
        <Bundle-RequiredExecutionEnvironment>J2SE-1.5</Bundle-RequiredExecutionEnvironment>
    </properties>

    <modelVersion>4.0.0</modelVersion>
    <parent>
        <groupId>net.sf.ehcache</groupId>
        <artifactId>ehcache-parent</artifactId>
        <version>2.3</version>
    </parent>
    <name>Ehcache Web Filters Parent</name>
    <artifactId>ehcache-web-parent</artifactId>
    <packaging>pom</packaging>
    <version>2.0.4</version>
    <description>parent pom for web module</description>


集成模块
J2SE-1.5
4.0.0
net.sf.ehcache
ehcache父级
2.3
Ehcache Web筛选器父级
ehcache web父对象
聚甲醛
2.0.4
web模块的父pom
似乎当存在父pom，并且在子pom中定义了存储库（在本例中为ehcache web）时，maven仅尝试从子pom中定义的存储库中查找父依赖项，而根本不在maven central中查找

在ehcache web pom中，您有：

<repositories>
  <repository>
    <id>sourceforge-snapshots</id>
    <name>Sourceforge Snapshot Repository</name>
    <url>http://oss.sonatype.org/content/repositories/sourceforge-snapshots</url>
  </repository>
</repositories>


sourceforge快照
Sourceforge快照存储库
http://oss.sonatype.org/content/repositories/sourceforge-snapshots

但由于父级不再是快照，并且已移动到maven central，因此找不到它。我通过简单地从本地pom文件（~/.m2/repository/net/sf/ehcache/ehcache-web/2.0.4/ehcache-web-2.0.4.pom）中删除repositories元素来解决这个问题

我还必须删除存储的ehcache web父pom文件，这只是一个重定向

我在网上发现有关这方面的信息少得出奇，但也许这些信息会有所帮助：