Maven Pom.xml issue

Question

I'm trying to make a spring mvc project using maven and getting following error in pom.xml:

CoreException: Could not calculate build plan: Plugin org.apache.maven.plugins:maven-compiler-plugin:2.3.2 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.apache.maven.plugins:maven-compiler-plugin:jar:2.3.2: ArtifactResolutionException: Failure to transfer org.apache.maven.plugins:maven-compiler-plugin:pom:2.3.2 from http:// repo.maven.apache.org/maven2 was cached in the local repository, resolution will not be reattempted until the update interval of central has elapsed or updates are forced. Original error: Could not transfer artifact org.apache.maven.plugins:maven-compiler-plugin:pom:2.3.2 from/to central (http:// repo.maven.apache.org/maven2): Connection refused: no further information to http://repo.maven.apache.org/maven2/org/apache/maven/plugins/maven-compiler-plugin/2.3.2/maven-compiler-plugin-2.3.2.pom

Is it related to proxy or firewall? What can I do to fix it?

Solution

Sounds like you need to set up a maven proxy in your settings.xml.

Have a look (for example) in your web browser and see how it is set up.

From the documentation on Configuring a proxy:

<proxy>
  <active>true</active>
  <protocol>http</protocol>
  <host>proxy.somewhere.com</host>
  <port>8080</port>
  <username>proxyuser</username>
  <password>somepassword</password>
  <nonProxyHosts>www.google.com|*.somewhere.com</nonProxyHosts>
</proxy>

Comments

[Felix]

I also had to update my Eclipse preferences to ensure Maven used the settings.xml file (see this answer).