monit - upstart script for logstash, writing the pid file that deals with the fork -

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i using example upstart script logstash having trouble writing pid file monit use @ /var/run/logstash.pid

when use "echo $$ > /var/run/logstash.pid" writes wrong pid value file, think value before fork. there solution this?

# logstash - agent instance #  description     "logstash agent instance"  start on virtual-filesystems stop on runlevel [06]  # respawn if process exits respawn respawn limit 5 30 limit nofile 65550 65550 expect fork  # need chdir somewhere writable because logstash needs unpack few # temporary files on startup. chdir /home/logstash  script   # runs logstash agent 'logstash' user   echo $$ > /var/run/logstash.pid   su -s /bin/sh -c 'exec "$0" "$@"' logstash -- /usr/bin/java -jar logstash.jar agent -f /etc/logstash/agent.conf --log /var/log/logstash.log &   emit logstash-agent-running end script


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