get_nn_stack.sh

get_nn_stack.sh

$ cat get_nn_stack.sh 
#!/bin/bash
pid=$(ps ax|grep namenode.NameNode|grep -v grep|awk '{print $1}')

topinfo=$(top -H -p $pid -b -n 3|grep -A1 'PID USER'|tail -1|awk '{print $1,$9}')
thread=$(echo $topinfo|awk '{print $1}')
cpu=$(echo $topinfo|awk '{print $2}')
echo $cpu

if [[ $(python -c "print $cpu > 70") = True ]]; then
    echo "thread $thread cpu usage over 70%"
else
    echo "no cpu usage issue"
    exit
fi

nid=$(python -c "print '0x%x' % $thread")
echo $nid

jstack $pid >/tmp/$pid.stack || jstack -F $pid >/tmp/$pid.stack

grep -A30 "nid=$nid" /tmp/$pid.stack
grep -A30 "Thread $thread" /tmp/$pid.stack