Today I stumbled upon a very slow site generation with mvn site. To be honest I didn’t really bother about having a look into tho log messages at first. But these messages should have made me conscious that something was going wrong:
[ERROR] Unable to determine if resource batik:batik-util:jar:1.6-1:compile exists in https://repository.jboss.org/nexus/content/groups/public/
[ERROR] Unable to determine if resource com.google.appengine:appengine-api-stubs:jar:1.4.3:test exists in https://repository.jboss.org/nexus/content/groups/public/
The message is quite clear, one of the report plugins (namely the dependency report plugin) tries to determine if resources are located within a given repository. If that repository doesn’t exist anyomore or is just terribly slow, your site build will be as well.
Thanks to Andy I figured out that I can easily swith that part off by providing an extra parameter to mvn site -Ddependency.locations.enabled=false.
Enjoy your faster site build, and do check your repository configurations regualary!
What is coming to myhead 
Thanks, it works very well.
I’ve googled some while to get the proper solution for “Unable to determine if resource …” problem and your solution is the best I think.
I find that adding false into of POM file also works.
Thanks – helped me! POM version would be (now XML-encoded!):
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-project-info-reports-plugin</artifactId>
<version>2.4</version>
<configuration>
<dependencyDetailsEnabled>false</dependencyDetailsEnabled>
<dependencyLocationsEnabled>false</dependencyLocationsEnabled>
</configuration>
</plugin>
Thanks!
You’re welcome Marcin.