maven无法解析hadoop项目的依赖项

nwsw7zdq 于 2021-06-02 发布在 Hadoop

关注(0)|答案(2)|浏览(758)

我想从hadoop的书中构建示例项目，但是我得到了“无法解析依赖项错误”。以下是生成过程中的错误：

[INFO] Building Chapter 2: MapReduce 3.0
[INFO] ------------------------------------------------------------------------
[WARNING] The POM for org.apache.hadoop:hadoop-core:jar:0.23.10 is missing, no dependency information available
[WARNING] The POM for org.apache.hadoop:hadoop-test:jar:0.23.10 is missing, no dependency information available
[INFO] ------------------------------------------------------------------------
[INFO] Reactor Summary:
[INFO] 
[INFO] Chapter 2: MapReduce .............................. FAILURE [1.409s]
[INFO] Hadoop: The Definitive Guide, Example Code ........ SKIPPED
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 1.819s
[INFO] Finished at: Wed May 14 12:19:14 EEST 2014
[INFO] Final Memory: 6M/67M
[INFO] ------------------------------------------------------------------------
[ERROR] Failed to execute goal on project ch02: Could not resolve dependencies for project com.hadoopbook:ch02:jar:3.0: The following artifacts could not be resolved: org.apache.hadoop:hadoop-core:jar:0.23.10, org.apache.hadoop:hadoop-test:jar:0.23.10: Failure to find org.apache.hadoop:hadoop-core:jar:0.23.10 in https://repository.apache.org/content/repositories/releases/ was cached in the local repository, resolution will not be reattempted until the update interval of apache.releases has elapsed or updates are forced -> [Help 1]

这是我的pom.xml for ch02项目

<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>com.hadoopbook</groupId>
    <artifactId>hadoop-meta</artifactId>
    <version>3.0</version>
    <relativePath>../hadoop-meta/pom.xml</relativePath>
  </parent>
  <groupId>com.hadoopbook</groupId>
  <artifactId>ch02</artifactId>
  <packaging>jar</packaging>
  <version>3.0</version>
  <name>Chapter 2: MapReduce</name>
  <dependencies>
    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
    </dependency>
    <dependency>
      <groupId>org.hamcrest</groupId>
      <artifactId>hamcrest-all</artifactId>
    </dependency>
  </dependencies>
</project>

你知道我如何用maven构建这个代码吗？问题是什么？谢谢

hadoop Maven mapreduce

来源：https://stackoverflow.com/questions/23651570/maven-could-not-resolve-dependencies-for-hadoop-project

2条答案

按热度按时间

8zzbczxx1#

现在的情况是，maven在远程存储库中找不到它要找的东西。因此，当它接触到apache的maven存储库时，它只是没有找到版本0.23.10 hadoop测试的资源。
尤其是问题中pom文件的第8行 <relativePath>../hadoop-meta/pom.xml</relativePath> 是指导maven看 hadoop-meta/pom.xml . 在第48行到第50行，您将看到hadoop测试库的规范：

<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-test</artifactId>
<version>${hadoop.version}</version>

那个 ${hadoop.version} 是在maven命令中指定的值，即 0.23.10 . 于是maven去了ApacheRepo，寻找hadoop测试v0.23.10，它并不存在。于是Maven摔倒了。
现在，如果您使用了hadoop测试中存在的版本，或者更改了pom文件，使hadoop测试不再是依赖项。

赞(0）回复(0）举报 2021-06-03

uqdfh47h2#

我也遇到了这个问题，原来是因为netbeans在pom.xml文件中添加了一些东西。再次检查自上次成功部署以来未添加任何内容。

赞(0）回复(0）举报 2021-06-03