If you are using the deploy:deploy-file goal and encounter this error:
"Error deploying artifact: Unsupported Protocol: 'ftp': Cannot find wagon which supports the requested protocol: ftp"
Then you need to place the appropriate wagon provider in your %M2_HOME%/lib. In this case the provider needed is ftp, so we have to place the wagon-ftp jar in the lib directory of your Maven 2 installation.
As an alternative to placing the wagon provider into the Maven distribution, you can also create a dummy POM that declares the required wagon as an <extension> inside the current directory.
If the error description is something like this:
"Error deploying artifact: Unsupported Protocol: 'ftp': Cannot find wagon which supports the requested protocol: ftp org/apache/commons/net/ftp/FTP"
Then you need to place the commons-net jar in %M2_HOME%/lib.
Yes, you can skip deployment of individual modules by configuring the Deploy Plugin as follows:
maven-deploy-plugin X.Y true