A little "pseudo java profiler" for the *NIX command line. Checks the top 10 cpu consuming java threads and prints for each of these the current thread stack. If threads are really really shortlived it can happen that we won't catch them with jstack.

pseudo_java_profiler.sh

#!/bin/bash

if [ "$#" -ne 1 ]; then
    echo "Usage: $0 jps-filter-grep-expr"
    exit 1
fi

jps_filter=$1

# extract the PID of the java process
java_app_pid=$(jps -lvm | grep ${jps_filter} | awk '{print $1}')

# get 10 top consuming threads
top_consuming_threads=$(top -n1 -H -p ${java_app_pid} | \
	egrep java | egrep -o '^[^0-9]*[0-9]+ ' | \
	sed -r 's/[^0-9]+//g' | head)

temp_file=$(mktemp)

# create jstack_output
jstack ${java_app_pid} > ${temp_file}

# print for every thread the current stack trace
for thread in ${top_consuming_threads}; do
        echo "Stack trace for Thread '${thread}':"
        printf -v thread_hex "%x" $thread
        grep -A10 "nid=0x${thread_hex}" ${temp_file}
        echo
done;

rm ${temp_file}