Analyze the thread usage of a java application and prints the top CPU consuming threads

top-consumers.sh

#!/bin/bash

if [ "$#" -ne 2 ]; then
        echo "usage: sh top-consumers.sh <pid> <number-of-consumers>"
        exit
fi

lowerBound=$(expr "$2" + 1) 

        jstack -l $1 > top-consumers_thread_dump.txt &
        ps --pid $1 -Lo pid,tid,%cpu,time,nlwp,c > top-consumers_thread_usage.txt
wait
cat top-consumers_thread_usage.txt  | sort -k 3 | tail -$lowerBound | head -$2 | awk '{print $2}' | xargs -I {}  echo "obase=16; {}"  | bc | xargs -I pattern grep -i pattern top-consumers_thread_dump.txt

rm top-consumers_thread_usage.txt top-consumers_thread_dump.txt