Troubleshoot high CPU usage in Java

Troubleshoot high CPU usage in Java

THE top Command finds that a process occupies 100% of the CPU.

Use the ps command to determine which process is faulty.

View the CPU usage list of the thread.

# Ps-mp PID-o THREAD, tid, time

Find the thread with the highest CPU usage, view TID, and convert it to hexadecimal format

# Printf "% x \ n" TID

View the stack information.

# Jstack PID | grep hexadecimal TID-A 60

The error is reported because the user running the tomcat process is tomcat, and the current user is the root user to view the stack information.

Switch to tomcat to execute the command

# Sudo-u tomcat jstack 32072 | grep 1541-A 60 # sudo-u tomcat jstack-J-d64-m 32072

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