ES启动报错最大进程数太少

[--16T18::,][INFO ][o.e.b.BootstrapChecks ] [node-] bound or publishing to a non-loopback address, enforcing bootstrap checks
[--16T18::,][ERROR][o.e.b.Bootstrap ] [node-] node validation exception
[] bootstrap checks failed
[]: max number of threads [] ]

[--17T19::,][ERROR][o.e.b.Bootstrap ] [node-] node validation exception
[] bootstrap checks failed
[]: max ] ]

最大进程数为1024是太少了，最少要增加到4096，但是生产中建议调大些，我们生产中使用的值是655350

解决方法：

vim /etc/security/limits.conf   #增加如下四行

elasticsearch soft nproc
elasticsearch hard nproc 

elasticsearch soft nofile
elasticsearch hard nofile 

退出终端，重新进入，重启ES