High CPU (old fashion)

A good old way to identify high CPU threads.

• identify WLS PID : jps -v. (or lsof -i @IP:port)
• take Thread Dumps: kill -3 <PID>,  jstack -l <PID>, jcmd <PID> Thread.print
• top -H -b -p <PID>
• identify child process from %CPU column
• convert those PID to Hex (ie: 3141): printf "%x " 3141
• search those Hex to Thread dump: nid=0xc45