The POM for org.jboss.maven.plugins:maven-jdocbook-plugin:jar:2.2.1 is missing, no dependency information available

["이희승 (Trustin Lee)"]

Did you check your ~/.m2/settings.xml if it points to repository.jboss.org?  If not, please check the build instruction in the web site:

    http://www.jboss.org/netty/build