top.sh

#!/bin/bash
redEcho()
{
    echo -e "\033[1;31m$@\033[0m"
}
pid=`pgrep java`
uuid=`date +%s`_${RANDOM}_$$
jstackFile=/tmp/${uuid}_${pid}

sudo -u tomcat jstack ${pid} > ${jstackFile}

top -b -n1 -d0.01 -H -p ${pid}  | grep tomcat  | sort -k9 -r -n | head -5 | while read threadLine ; do

        threadId=`echo ${threadLine} | awk '{print $1}'`
        threadId0x=`printf %x ${threadId}`
        pcpu=`echo ${threadLine} | awk '{print $9}'`
        user=`echo ${threadLine} | awk '{print $2}'`

        [ ! -f "${jstackFile}" ] &&
        {
            { redEcho "Fail to jstack java process ${pid}"; rm ${jstackFile} ; continue; }
        }

        redEcho "The stack of busy(${pcpu}%) thread(${threadId}/0x${threadId0x}) of java process(${pid} of user(${user}):"
        sed "/nid=0x${threadId0x}/,/^$/p" -n ${jstackFile}
done

rm /tmp/${uuid}_*