I am unable to run maven2

Question

I am not able to run Maven 2.1. I get following Error while running:

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naresh@HYRDSRVIHUB01:~/.m2> mvn  archetype:create -DarchetypeGroupId=org.apache.maven.archetypes -DgroupId=com.mycompany.app -DartifactId=my-app
[INFO] Scanning for projects...
[INFO] Searching repository for plugin with prefix: 'archetype'.
[INFO] org.apache.maven.plugins: checking for updates from central
[WARNING] repository metadata for: 'org.apache.maven.plugins' could not be retrieved from repository: central due to an error: Error transferring file: Connection refused
[INFO] Repository 'central' will be blacklisted
[INFO] ------------------------------------------------------------------------
[ERROR] BUILD ERROR
[INFO] ------------------------------------------------------------------------
[INFO] The plugin 'org.apache.maven.plugins:maven-archetype-plugin' does not exist or no valid version could be found
[INFO] ------------------------------------------------------------------------
[INFO] For more information, run Maven with the -e switch
[INFO] ------------------------------------------------------------------------
[INFO] Total time: < 1 second
[INFO] Finished at: Thu Jul 22 17:59:02 IST 2010
[INFO] Final Memory: 3M/240M
[INFO] ------------------------------------------------------------------------

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Help me to get rid of it.

Answer 1

Your running maven, the issue is either with your connection it seems to be getting rejected by the maven repo:

[WARNING] repository metadata for: 'org.apache.maven.plugins' could not be retrieved from repository: central due to an error: Error transferring file: Connection refused

Answer 2

As already pointed out, you are running Maven. However, depending on what you're asking Maven to do, Maven might have to download libraries from a remote repository: plugins, dependencies, etc that are then stored in your local repository and downloading libraries from a remote repository requires a connection.

If you start using Maven with an empty local repository, this is something you can't avoid and you'll have to let Maven download what it needs first.

Sure, you can run Maven offline (using the -o or --offline command line optionsbut this will work only if you already have the required stuff in your local repository.

Oh, and by the way, I'm not sure it's really wise to create a project under your ~/.m2 directory. You should run archetype:create from another location, e.g. ~/Projects.