Maven will only download a pom, it won't download the jar

Question

I am new to maven and I am having what I'm sure is a config issue. I have my master pom and a child jar pom. Inside the jar pom I declared this dependency:

<dependency>  
  <groupId>commons-lang</groupId>  
  <artifactId>commons-lang</artifactId>  
  <version>2.4</version>  
</dependency>

However, when I look in my $HOME/.m2/repository dir, only the pom file is there. There is no jar file. Most of the other dependencies have jar files, but not this one. Without this jar, the compile step is failing.

Any ideas about what I am doing wrong?

Answer 1

The commons-lang 2.4 jar is on the Maven repo : http://repo1.maven.org/maven2/commons-lang/commons-lang/2.4/

There are several possibilities to solve your problem:

• you can manually add the jar to your local repository, using the "mvn install:install-file" goal, or directly by putting the jar in the good directory
• you can delete the commons-lang directory in your repository, and lauch Maven again. Sometimes, Maven download fails and a clenup of your local repository can solve the problem

Answer 2

Is it possible that you are behind a proxy server/firewall, which is preventing downloads of "jar" files?