Threads stuck at 100% CPU utilization in HashMap during JSF saveState()

Question

We have an issue in our production environment, 4 Threads is at 100% CPU Usage from the HTOP command. To further investigate the issue I generated a Thread dump in order to

Answer 1

after long analysis my issue is resolved.

as we are using jsf 2.1.7 version , UI repeat implemented using hashmap in 2.1.7 version. hence when we use the nested ui repeat cpu is high. i have replaced ui repeat with JSTL for each now the application is working.

other way also you can use, you need to change the JSF 2.2.4 OR LATER VERSION.