yhu@YuCheng-Hu:~/apache-druid-0.21.1/bin$ ./start-nano-quickstartDruid only officially supports Java 8. Any Java version later than 8 is still experimental. Your current version is: 11.0.11.
[Fri May 28 00:17:16 2021] Command[zk] exited (pid = 3835, exited = 1)[Fri May 28 00:17:16 2021] Command[zk] failed, see logfile for more details: /var/druid/var/sv/zk.log