[1]: max file descriptors [4096] for elasticsearch process is too low, increase to at least [65535]
vi /etc/security/limits.conf
www soft nofile 65535
www hard nofile 65535

[2]: max virtual memory areas vm.max_map_count [65530] is too low, increase to at least [262144]
vi  /etc/sysctl.conf
vm.max_map_count=262144

sysctl -p
cat /proc/sys/vm/max_map_count

//关闭IPV6 
vi /etc/sysctl.conf
配置，增加  
net.ipv6.conf.all.disable_ipv6=1

vi /etc/sysconfig/network
配置，增加 
NETWORKING_IPV6=no

vi /etc/sysconfig/network-scripts/ifcfg-eno16777736，确保IPV6INIT=no

systemctl disable ip6tables.service
sysctl -p
iptables -F