run solr like daemon - bash

Question

I try to make solr to run as a startup script in /etc/init.d/solr.
This is script that I copypasted from How to start Solr automatically?
#!/bin/sh
# Prerequisites:
# 1. Solr needs to be installed at /usr/local/solr/example
# 2. daemon needs to be installed
# 3. Script needs to be executed by root
# This script will launch Solr in a mode that will automatically respawn if it
# crashes. Output will be sent to /var/log/solr/solr.log. A PID file will be
# created in the standard location.
# Comments to support chkconfig on Red Hat Linux
# chkconfig: 2345 64 36
# Description: A very fast and reliable search engine.
# processname solr
# Source function library.
. /etc/init.d/functions
start () {
echo -n "Starting solr..."
# start daemon
daemon --chdir='/usr/local/solr/example' --command "java -jar start.jar" --respawn --output=/var/log/solr/solr.log --name=solr --verbose
RETVAL=$?
if [ $RETVAL = 0 ]
then
echo "done."
else
echo "failed. See error code for more information."
fi
return $RETVAL
}
stop () {
# stop daemon
echo -n "Stopping solr..."
daemon --stop --name=solr --verbose
RETVAL=$?
if [ $RETVAL = 0 ]
then
echo "done."
else
echo "failed. See error code for more information."
fi
return $RETVAL
}
restart () {
daemon --restart --name=solr --verbose
}
status () {
# report on the status of the daemon
daemon --running --verbose --name=solr
return $?
}
case "$1" in
start)
start
;;
status)
status
;;
stop)
stop
;;
restart)
restart
;;
*)
echo $"Usage: solr {start|status|stop|restart}"
exit 3
;;
esac
exit $RETVAL
I did everything as described in above link. But get an error
service solr start
Starting solr.../etc/init.d/solr: Usage: daemon [+/-nicelevel] {program}
failed. See error code for more information.
reading https://blog.hazrulnizam.com/create-init-script-centos-6/ I don't understand why daemon was written incorrect

Answer 1

This isn't working because the daemon function (from /etc/init.d/functions) has changed since 2010 (when the script was posted) and no longer accepts the same arguments. You will need to rewrite the daemon line to accept the currently supported arguments.
I had a look at the daemon function on a CentOS 6 box, and it looks like you might be able to replace this line:
daemon --chdir='/usr/local/solr/example' --command "java -jar start.jar" --respawn --output=/var/log/solr/solr.log --name=solr --verbose
with just this:
daemon "java -jar /usr/local/solr/example/start.jar"
(assuming that solr is installed in /usr/local/solr/example).