Started calculate disk usage of build Finished Calculation of disk usage of build in 0 seconds Started calculate disk usage of workspace Finished Calculation of disk usage of workspace in 0 seconds [INFO] ------------------------------------------------------------------------ [INFO] Reactor Summary: [INFO] [INFO] citizens-parent ................................... SUCCESS [3.951s] [INFO] citizens-main ..................................... SUCCESS [2:16.437s] [INFO] citizens-v1_10_R1 ................................. SUCCESS [44.858s] [INFO] citizens-v1_11_R1 ................................. SUCCESS [1:12.271s] [INFO] citizens-v1_12_R1 ................................. FAILURE [4.897s] [INFO] citizens .......................................... SKIPPED [INFO] ------------------------------------------------------------------------ [INFO] BUILD FAILURE [INFO] ------------------------------------------------------------------------ [INFO] Total time: 4:28.110s [INFO] Finished at: Fri Jun 02 12:39:47 GMT 2017 [INFO] Final Memory: 45M/238M [INFO] ------------------------------------------------------------------------ [ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:2.3.2:compile (default-compile) on project citizens-v1_12_R1: Compilation failure [ERROR] /var/lib/jenkins/jobs/Citizens2/workspace/v1_12_R1/src/main/java/net/citizensnpcs/nms/v1_12_R1/util/PlayerPathfinderAbstract.java:[13,61] error: diamond operator is not supported in -source 1.6 [ERROR] -> [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/MojoFailureException [ERROR] [ERROR] After correcting the problems, you can resume the build with the command [ERROR] mvn <goals> -rf :citizens-v1_12_R1 Started Build failed before it gets to this module Started calculate disk usage of build Finished Calculation of disk usage of build in 0 seconds Started calculate disk usage of workspace Finished Calculation of disk usage of workspace in 0 seconds Finished: NOT_BUILT