jun 22 16:20:07 solr_start[1488]: *** [WARN] ***  Your Max Processes Limit is currently 14972.
jun 22 16:20:07 solr_start[1488]: It should be set to 65000 to avoid operational disruption.
jun 22 16:20:07 solr_start[1488]: If you no longer wish to see this warning, set SOLR_ULIMIT_CHECKS to false in your profile or solr.in.sh
jun 22 16:20:09 solr_start[1488]: Warning: Available entropy is low. As a result, use of the UUIDField, SSL, or any other features that require
jun 22 16:20:09 solr_start[1488]: RNG might not work properly. To check for the amount of available entropy, use 'cat /proc/sys/kernel/random/entropy_avail'.
jun 22 16:20:14 solr_start[1488]: [146B blob data]
jun 22 16:20:14 solr_start[1488]: Started Solr server on port 8983 (pid=1579). Happy searching!
jun 22 16:20:15 solr_stop[1680]: Sending stop command to Solr running on port 8983 ... waiting up to 180 seconds to allow Jetty process 1579 to stop gracefully.

[Unit]
Description=Apache SOLR
After=syslog.target network.target remote-fs.target nss-lookup.target systemd-journald-dev-log.socket
Before=multi-user.target
[Service]
User=solr
#PIDFile=/mnt/solrdata/solr-8983.pid
Environment=SOLR_INCLUDE=/opt/solr/bin/solr.in.sh
ExecStart=/opt/solr/bin/solr_start
ExecStop=/opt/solr/bin/solr_stop
#Restart=on-failure
[Install]
WantedBy=multi-user.target​

[solr@xxx ~]# ulimit -n
unlimited
[root@xxx ~]# ulimit -u
unlimited