I see a lot of unfinished connections from attribute services:
$ sudo /usr/sbin/lsof -c jsvc -a -i TCP
[...]
jsvc 16364 tomcat 234u IPv6 20371631 TCP
ipcc-ar5.dkrz.de:39577->pcmdi3.llnl.gov:https (CLOSE_WAIT)
jsvc 16364 tomcat 235u IPv6 19310867 TCP
ipcc-ar5.dkrz.de:40920->pcmdi3.llnl.gov:https (CLOSE_WAIT)
jsvc 16364 tomcat 236u IPv6 19829677 TCP
ipcc-ar5.dkrz.de:46352->jpl-esg.jpl.nasa.gov:https (ESTABLISHED)
jsvc 16364 tomcat 237u IPv6 19628312 TCP
ipcc-ar5.dkrz.de:40645->pcmdi7.llnl.gov:https (CLOSE_WAIT)
jsvc 16364 tomcat 238u IPv6 71198 TCP *:8009 (LISTEN)
jsvc 16364 tomcat 240u IPv6 19303015 TCP
ipcc-ar5.dkrz.de:38545->pcmdi3.llnl.gov:https (CLOSE_WAIT)
jsvc 16364 tomcat 241u IPv6 18971810 TCP
ipcc-ar5.dkrz.de:52066->jpl-esg.jpl.nasa.gov:http (ESTABLISHED)
jsvc 16364 tomcat 242u IPv6 78412 TCP
ipcc-ar5.dkrz.de:39598->drought.badc.rl.ac.uk:https (CLOSE_WAIT)
jsvc 16364 tomcat 243u IPv6 19894013 TCP
ipcc-ar5.dkrz.de:41562->pcmdi7.llnl.gov:https (CLOSE_WAIT)
jsvc 16364 tomcat 244u IPv6 20302153 TCP