The reason why Java consumes a lot of CPU resources in CentOS __centos

1, using the top command to find the PID of the Java process, I found here the PID is 16871.

2, after you locate the process, locate the specific thread or code, first display the list of threads, and sort by the CPU-intensive thread:
PS-MP 16871-o Thread,tid,time | Sort-rn

The results appear as follows:
User%cpu PRI SCNT wchan user SYSTEM TID time
Root 90.5 19––––9521 01:16:48
Root 90.1 19––––9522 01:02:16

Found the most time-consuming thread 9521, CPU time for 1 hours.

Converts the required thread ID to a 16-in-system format:
printf "%xn" 9521
2531

Finally, use the JVM command to print the thread's stack information:
Jstack 16871 |grep 2531-a 30

This will find the code that occupies the JAVA,CPU resource, and then you have to analyze the reason for the execution of the code.