DuplicatedSourceException when I use "mvn -f" and there is symbolics links

I use jenkins for CI. When jenkins launches something like mvn -B -f /cis/jenkins/jobs/develplugin/workspace/pom.xml clean sonar:sonar package javadoc:javadoc org.sonar.api.resources.DuplicatedSourceException occurs.
The reason seems to be that we have a link under "/cis/jenkins/jobs", pointing to a directory called "/jrepos", and sonar-pom.xml fills with the following entry: "<sonar.sources>,/cis/jenkins/jobs/develplugin/workspace/src/main/java,/jrepos/develplugin/workspace/src/main/java,/jrepos/develplugin/work
space/src/main/resources</sonar.sources>", I mean, two entries are duplicated and DuplicatedSourceException is raised.