来自Maven Central的ehcache依赖关系出现问题

Question

我正在尝试在具有空.m2 /存储库目录的新笔记本电脑上构建项目。 我收到以下错误：

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，并且这种依赖关系最近没有改变。 该构建最近正在运行。

我不了解有关for project: null:ehcache-web:jar:null它在哪里获取null？

net.sf.ehcache：ehcache-web：2.0.4 pom开始如下...

<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>

net.sf.ehcache：ehcache-web-parent：2.0.4 pom开始如下...

<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">
    <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>

Answer 1

似乎有一个父pom，并且在子pom中定义了存储库（在这种情况下为ehcache-web），maven尝试仅从子pom中定义的存储库中查找父依赖项。精通中央。

在ehcache-web pom中，您有以下内容：

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

但是由于父级不再是快照，并且已被移至Maven中央，因此找不到该父级。 我通过从本地pom文件（〜/ .m2 / repository / net / sf / ehcache / ehcache-ehcache-web / 2.0.4 / ehcache-web-2.0.4.pom）中删除存储库元素来解决此问题。

我还必须删除存储的ehcache-web-parent pom文件，该文件只是重定向。

我在网上发现了很少的有关此信息的信息，但也许这些信息对您有所帮助： https : //issues.sonatype.org/browse/MVNCENTRAL-468 http://jira.codehaus.org/browse/MANTTASKS-246