1. org.elasticsearch.bootstrap.StartupException: java.lang.RuntimeException: can not run elasticsearch as root
解决：切换非root用户
2.Likely root cause: java.nio.file.AccessDeniedException: /usr/local/elasticsearch-6.4.3/config/elasticsearch.keystore
解决 ：权限不够
chown -R esuser:esuser /usr/local/elasticsearch-6.4.3
3.ERROR: [1] bootstrap checks failed
[1]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
max_map_count 提升到262144
解决
vim /etc/sysctl.conf
max_map_count=262145
sysctl -p (重新生效)
来源：oschina
链接：https://my.oschina.net/u/4182459/blog/3188966