[INFO] ------------------------------------------------------------------------ [ERROR] Plugin org.jacoco:jacoco-maven-plugin:0.8.1 or one of its dependencies could not be resolved: Failed to read artifact descriptor for org.jacoco:jacoco-maven-plugin:jar:0.8.1: Could not transfer artifact org.jacoco:jacoco-maven-plugin:pom:0.8.1 from/to se-nexus (https://nexus.se.rwth-aachen.de/content/groups/public): sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target -> [Help 1] [ERROR] [ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch. [ERROR] Re-run Maven using the -X switch to enable full debug logging. [ERROR] [ERROR] For more information about the errors and possible solutions, please read the following articles: [ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/PluginResolutionException ERROR: Job failed: exit code 1