完整的警告信息：
*** [WARN] *** Your open file limit is currently 1024. It should be set to 65000 to avoid operational disruption. If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh *** [WARN] *** Your Max Processes Limit is currently 30515. It should be set to 65000 to avoid operational disruption. If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh
方法1：
ulimit -Sn 65535 ulimit -Hn 65535 ulimit -Su 65535 ulimit -Hu 65535
方法2：
编辑limits.conf文件：
sudo vim /etc/security/limits.conf
1.针对Your open file limit is currently 1024，增加hard nofile和soft nofile的配置
2.针对Your Max Processes Limit is currently 47448，增加hard nproc和soft nproc的配置
1和2合起来就是在limits.conf文件追加4行：
* hard nofile 65535 * soft nofile 65535 * hard nproc 65535 * soft nproc 65535