When installing D2 and launching the tomcat server you can have an error on a missing lib: JSAFE_SecureRandom. Here’s the trace you can have: 2018-01-17 17:32:19 [DEBUG] [localhost-startStop-1] - c.e.c.d.contents.D2FileCleaningTracker : Init D2FileCleaningTracker with /pkgs/dms-tomcat/D2_TOMCAT_HOME/temp/D2FileCleaningTracker_D2.ser 2018-01-17 17:32:20 [ERROR](…)