Java trace of running logstash instance

log-core.sh

#!/bin/bash
#---
#   take a dump of logstash process before restarting
#---

JSTACK=/usr/bin/jstack
JPS=/usr/bin/jps
APP=logstash
NOW=`date +%s`
OUTFILE=/var/log/logstash/$APP-trace-$NOW

cat >> $OUTFILE <<EOT
#########
# STATS #
#########

EOT
top -b -n1 -H | awk /java/ | sed -r "s/\x1B\[([0-9]{1,2}(;[0-9]{1,2})?)?[m|K]//g" >> $OUTFILE


cat >> $OUTFILE <<EOT

###############
# PIDS IN HEX #
###############

EOT
awk '/^[0-9]/{ printf "0x%x\n", $1 }' $OUTFILE  >> $OUTFILE

cat >> $OUTFILE <<EOT

#########
# STACK #
#########

EOT
PROCESS=`$JPS -l | awk "/$APP/"'{ print $1 }'`
$JSTACK $PROCESS >> $OUTFILE