与maven + ant拒绝连接：

Question

我想把Hadoop-24建在窗户上。突然之间，一切都很好：

[INFO] Apache Hadoop HttpFS .............................. FAILURE [8.568s]

关联的错误是：

[ERROR] Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7: run (dist) on project hadoop-hdfs-httpfs: An Ant BuildException has occured: java.net.ConnectException: Connection refused: connect
[ERROR] around Ant part ...<get dest="downloads/apache-tomcat-6.0.36.tar.gz" skipexisting="true" verbose="true" src="http://archive.apache.org/dist/tomcat/tomcat-6/v6.0.36/bin/apache-tomcat-6.0.36.tar.gz"/>... @ 5:182 in C:\hadoop-src\hadoop-hdfs-project\hadoop-hdfs-httpfs\target\antrun\build-main.xml
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (dist) on project hadoop-hdfs-httpfs: An Ant BuildException has occured: java.net.ConnectException: Connection refused: connect
around Ant part ...<get dest="downloads/apache-tomcat-6.0.36.tar.gz" skipexisting="true" verbose="true" src="http://archive.apache.org/dist/tomcat/tomcat-6/v6.0
.36/bin/apache-tomcat-6.0.36.tar.gz"/>... @ 5:182 in C:\hadoop-src\hadoop-hdfs-project\hadoop-hdfs-httpfs\target\antrun\build-main.xml

一切似乎都表明了一个连接错误。然而：

1. 其他软件包都是毫不费力地下载的(通过Maven和Ant)
2. 代理配置良好(参见第一点)
3. 我可以通过firefox下载上述文件。

现在，我通过手动下载文件并将其放置在预期的位置，从而避免了这个问题。不过，我想明白，为何这是不自然的。你们能明白原因吗？

Answer 1

这是由于代理设置。理论上，maven应该检查/.m2下的/.m2文件，但出于某种原因，maven的运行插件没有这样做。因此，您必须在maven命令中指定它，如下所示

mvn package -Dhttp.proxyHost=<your proxy host> -Dhttp.proxyPort=8080